This is Minneapolis–St. Paul's heating and cooling page, built from Minneapolis–St. Paul's own numbers: Census housing figures, the metro's ZIP codes and its NOAA climate record. TempReach USA routes your call to an independent local HVAC technician; the homework below is here so you know your home's likely problems before you ever make it.
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The median Minneapolis–St. Paul home was built in 1980; 49.5% of the stock predates 1980, and the pattern this metro's own data ranks first is the refrigerant transition reaching older systems. TempReach USA is a referral service, not an HVAC company: one call connects you with an independent local HVAC technician serving your ZIP code.
Start with the raw material: 3,693,351 people, 1,530,451 housing units, and a housing stock whose middle home was built in 1980. That single date organises everything on this page. On one side of it stand the older districts — 26.4% of homes predate 1960, 49.5% predate 1980 — heated and cooled by systems renewed in pieces for decades, in homes across Anoka, Carver, Chisago, Dakota, Hennepin, Isanti, Le Sueur, Mille Lacs, Ramsey, Scott, Sherburne, Washington, Wright, Pierce, St. Croix. On the other side, the 23.2% built since 2000 run matched modern equipment, and fail in the newer ways. A Minneapolis–St. Paul technician reads a home's build year the way a doctor reads a chart: it predicts, before a single panel is opened, which systems deserve suspicion first.
Stand in one of Minneapolis–St. Paul's older neighbourhoods and you are standing in its HVAC's back catalogue. The homes there — part of the 757,573 built before 1980 across this metro — went up when a furnace was built to serve for a generation and central cooling was still spreading street by street. That generation has now elapsed several times over. What it leaves behind is not universal failure but universal exposure: every duct joint, igniter and condenser coil in those districts is operating past the horizon its makers planned for, in Anoka County and beyond, and the failures arrive in the order the parts tire.
The newer side of Minneapolis–St. Paul — the 23.2% of homes built since 2000, concentrated around growing communities like Minneapolis — runs on matched modern systems that age more gracefully but fail in their own ways: heat pumps and condensers worked hard by 702 cooling degree days of hot-season demand, control boards and sensors wearing out in houses that all reach the same age at the same time. One metro, two equipment generations, and the sections below take them in the order this metro's data ranks them.
One more record sits over the whole metro, and it is the one the equipment itself keeps: the weather's. MPLS CRYSTAL AP, MN US logs 30.71 inches of precipitation in an average year and swings between 12.1 days at 90 degrees or more and 154.9 nights at or below freezing. Heating systems ride that swing in their run hours; cooling systems ride it in their cycle counts; ducts ride it in the attics, expanding and contracting between the seasons. Cross the swing with the housing ages above and the selection of problems further down this page stops looking like a list and starts looking like an arithmetic result.
The metro's building eras on one side, its weather record on the other — and its heating and cooling where the two meet.
Lay the eras side by side instead: 26.4% pre-1960 (404,039 homes), 23.1% from 1960-1979 (353,534), 27.2% from 1980-1999 (416,283), and 23.2% since 2000 (355,065). No single era tells the story — the proportions among them do, and those proportions are different in every metro this site covers.
This metro's stock was mostly built in HVAC's transitional decades, 1980 to 1999, and it shows a particular failure calendar: not the deep-design sagas of the old metros, but the wear-out wave of everything installed in those years arriving together — capacitors, igniters, control boards, the first of the modern systems ageing into their verdicts. Minneapolis–St. Paul's HVAC story for the next decade is largely written: it is the story of that installed base reaching its limits neighbourhood by neighbourhood.
Behind the leading era sits the founding stock: 404,039 homes from before 1960, 26.4% of the metro. Second place in the table does not mean second place in the workload — those homes carry the oldest system designs in Minneapolis–St. Paul, and a disproportionate share of its serious HVAC begins on their streets, in Minneapolis's first districts and the suburbs that followed them.
A profile needs its climate column, and Minneapolis–St. Paul's comes from MPLS CRYSTAL AP, MN US: an average year of 45.8 degrees, built from extremes at both ends. The heating load (7,654 degree days) and the cooling load (702) together set the system's working life; the precipitation total (30.71 inches) sets the moisture the cooling half must remove; the freeze count (154.9 nights) sets the stakes of every heating failure. Four numbers — and most of the metro's HVAC behaviour follows from them.
That is the whole method of this page in one section: era shares from the Census, loads from NOAA, and a problem list that is simply where the two overlap most in Minneapolis–St. Paul. The services and guidance that follow are ordered by the same profile — local first, generic last.
Selected and ranked from this metro's housing-age profile and climate record — not copied from another city's page.
There is a paperwork side to the transition that touches Minneapolis–St. Paul homes quietly. Refrigerant work is regulated work: recovery, handling and record-keeping rules apply to whoever services a system, and the newest refrigerants — mildly flammable by classification — arrive with their own sensors, labeling and code provisions that installers must follow. For the homeowner the visible part is small: a nameplate with a different designation, a technician explaining why a charge is measured and documented as it is, an installation that includes leak-detection provisions the older system never had. The invisible part matters more over time: as the newest generation becomes the metro's standard, parts, training and service practice consolidate around it, and the older generations become the specialty work. Owning an older-generation system is not a fault — but its service ecosystem is, year by year, becoming a smaller room.
A transition-aware service visit has a recognizable order. First, identification: the nameplate's refrigerant, model and year, stated aloud so the household and technician share the fact. Second, the leak question, taken seriously — a system low on charge has a leak until proven otherwise, and recharging without finding it is buying the same refrigerant twice on an installment plan. Third, the condition audit around the failure: compressor health, coil condition, electrical wear, because the decision the household faces is about the whole machine, not the one part that stopped. Fourth, the comparison itself, presented as what it is — the repair path with its realistic horizon, the replacement path with its — so the choice is made on the machine's merits and the household's plans for the home. In Minneapolis–St. Paul that conversation, held in a calm season, is unhurried and genuinely optional-feeling; held in a heat wave, the same facts arrive wearing a deadline.
Housing arithmetic shows the exposure: with 49.5% of Minneapolis–St. Paul's homes built before 1980 and equipment replaced in long cycles ever since, a substantial share of the metro's systems belong to refrigerant generations the market has already succeeded. The nameplates say so, one address at a time.
There is a pattern to which furnaces fail in a cold snap: it is the ones that were already negotiating. The unit that locked out twice in December and recovered, the one whose blower grew loud in the season's first month, the one heating an the 1980s home whose ductwork was never generous — the snap does not create their problems, it schedules them simultaneously. In Minneapolis–St. Paul a hard cold week therefore reads like a census of deferred maintenance, street by street. The households absent from that census share a habit rather than a budget: their furnaces were looked at before the season turned, by someone who treats an igniter's resistance reading and a flame sensor's condition as the forecasts they are.
Judge a furnace by its coldest week, not its kindest. In its coldest week a Minneapolis–St. Paul furnace shows its true condition: whether it lights first time every time, whether it holds the house through the night without the temperature sagging, whether its sounds are the sounds it made when it was younger. MPLS CRYSTAL AP, MN US's record — 154.9 freezing nights in an average year — makes the examination annual and unsparing. Households that come through it without drama have usually done one unglamorous thing: they treated the autumn symptoms as the season's advance copy. A furnace rarely fails without having filed its intentions first, in a slower start, a louder cycle, a room that stopped keeping up. The winter merely publishes what the furnace had already written.
The timing testifies. Furnace failures in Minneapolis–St. Paul concentrate in the coldest stretches of the 154.9 freezing nights MPLS CRYSTAL AP, MN US records — the failures follow the load curve, which is the signature of wear meeting demand rather than chance meeting a machine.
The freeze changes the meaning of symptoms. A furnace that lockouts and recovers in October is a nuisance; the same behavior with the temperature falling through the twenties outside is a system announcing that it may not be present for the coldest hours. In Minneapolis–St. Paul, experienced households read winter heating symptoms against the forecast rather than the calendar: intermittent operation ahead of a cold snap is a reason to act that day, because the snap will test the system at exactly the load where its weakness lives, and it will do so at the hour when every other weak system in the metro is being tested too. The queue forms in the cold, all at once, for reasons that were visible in the mild weather before it. The freeze-risk pattern is therefore partly a story about timing — the gap between when a system files its intentions and when the weather collects on them.
The physics of the risk run on a simple clock. A house loses heat through its envelope at a rate set by the temperature difference across it; in a hard freeze that difference is the widest of the year, so the indoor temperature of an unheated house falls fastest exactly when the consequences of falling are gravest. The fall is uneven: rooms over unheated spaces and against the wind cool first, wall cavities housing pipes cool faster than the rooms they serve, and a pipe can reach freezing beside a room that still feels merely chilly. That unevenness is the trap in a household's intuition — the thermostat's reading is the house's average story, while the pipes live in its coldest footnotes. In Minneapolis–St. Paul the margin between a cold night and a damaging one is often a single night's depth of freeze against a house whose heat failed that morning, which is why the response sequence treats hours as the unit of value.
The housing detail completes the case: with a median build year of 1980, much of Minneapolis–St. Paul's stock routes water through exterior walls, crawl spaces and additions — placements that are unremarkable in October and decisive in a January freeze with the heat off. The risk is built in; only its management is optional.
Duct loss hides inside other complaints. It presents as an air conditioner that cannot keep up in July — because the supply run through the attic is delivering air that picked up heat the whole way there. It presents as dust that returns days after cleaning, drawn in through return leaks in the crawl space. It presents as a furnace that heats the basement ceiling handsomely and the bedrooms modestly. In Minneapolis–St. Paul, where many homes route their ducts outside the conditioned envelope by design of their era, these presentations are common enough to have a standing place in a technician's first questions. Separating duct loss from equipment weakness takes measurement rather than opinion — pressures and temperatures at the registers compared with those at the unit — and the separation matters, because the remedies are entirely different and only one of them touches the actual loss.
Read a duct system the way a technician does and the examination has a shape: start at the air handler and work outward. At the plenum, connections are inspected where they are most stressed and most consequential. Along the runs, the checks are for the known failure family — separated joints, fallen insulation, sagging flex, crushed sections, takeoffs that were sealed with hope rather than mastic. At the registers, temperatures and airflow are compared room by room, and the map of strong and weak rooms is laid over the map of the runs themselves; the two maps explain each other with remarkable consistency. Returns get the same walk, with attention to panned cavities and any path that lets the system breathe from outside the envelope. Cleaning belongs in this picture where the inspection finds accumulation — but cleaning a leaking network without sealing it polishes the inside of a system that is losing its cargo through the walls.
Consider the delivery assumption: every system in Minneapolis–St. Paul was sized on the expectation that its air would arrive. With 49.5% of homes built before 1980 — and their networks renovated, extended and re-sealed by turns ever since — that expectation's reliability varies house by house, which is why the measurement, not the assumption, has to govern.
An ageing system rarely announces its age in one event. It negotiates. In Minneapolis–St. Paul the negotiation sounds like a house that takes longer to cool on the same afternoon weather, a furnace that needs two cycles to do what one did, a blower audible through a vent that used to be silent. The equipment in the metro's the 1980s homes has usually been repaired in pieces across the years — a motor here, a board there — so its age is not a single number but a profile of generations bolted together. That profile is what a thorough maintenance visit actually reads: which components are original, which are renewed, and where the next failure is most likely to file from. Households that know their system's profile make calm decisions; households that meet it for the first time in a breakdown make hurried ones.
The mechanics of ageing are unglamorous and cumulative. Bearings wear and draw more current. Capacitor values drift downward year by year, weakening every start they assist. Coil surfaces oxidize and foul, shedding their ability to exchange heat a fraction at a time. Refrigerant leaves through seals and joints at a pace too small to notice in a season and large enough to matter in five. Electrical connections loosen under thermal cycling and add resistance that becomes heat. None of these processes stops, but most of them are measurable long before they are fatal — which is precisely what separates maintenance from repair. A tune-up measures the drift; a repair replaces whatever the drift finally claimed. The household that buys measurement regularly buys the choice of when to spend on renewal, and that choice is worth the most on the oldest equipment.
The housing record is the evidence: 26.4% of Minneapolis–St. Paul's homes predate 1960 and 49.5% predate 1980. Equipment lives and ages inside that stock, so the metro's systems are, as a population, exactly as old as its building history says they should be.
This is the season the metro's housing is examined by the weather, and the examination is practical: heating plant against 7,654 heating degree days, envelopes against 154.9 freezing nights, condensate lines and vent terminations against snow and ice. The older districts sit the hardest paper — systems of advancing age serving the 757,573 pre-1980 homes across the metro — but no system is exempt; a new furnace with a frozen condensate run stops as completely as an old one with a spent igniter. Between cold snaps, the season's quieter work continues — filters loading, ducts breathing with the temperature swings — and the households that keep the small rhythm are the ones the big cold never gets a chance to interview.
The season loads Minneapolis–St. Paul's systems the way its record at MPLS CRYSTAL AP, MN US says it will: 7,654 heating degree days against 702 cooling degree days in an average year, against a housing stock whose median build year is 1980. The households that read the season early — filters, drains, a system run before the extreme weeks — are the ones whose calls stay schedulable.
The closer look reveals an irony at the transition's core. The systems most exposed to it — the oldest refrigerant generation — are concentrated in the homes least able to treat replacement casually: Minneapolis–St. Paul's older housing, whose owners inherited their equipment's generation along with its era's ductwork and electrical service. For those households the repair-versus-replace decision carries more weight per dollar, and the quality of the conversation matters accordingly. Good local practice in this metro recognizes the stakes explicitly: present the leak, the machine's full condition, and both paths with their honest horizons, and let the decision be the household's, made with the nameplate fact on the table. The transition will complete itself across this metro one household decision at a time; the households served well are the ones whose decisions were informed rather than hurried.
The numbers underneath it, for Minneapolis–St. Paul: 1,530,451 housing units, a median build year of 1980, and a climate record at MPLS CRYSTAL AP, MN US of 7,654 heating degree days against 702 cooling degree days. Cross the housing record with the weather record and this pattern is what falls out at the top — rarely the most dramatic problem in heating and cooling, but the one this metro's stock and climate manufacture most steadily.
On a first visit for this pattern, a local technician's checks run in a practised order:
Ordered by what this metro's data says its homes need most.
The local professional you are connected with reads the system the way it fails: electrical values first, then temperatures and pressures, then airflow, until one finding explains all of the symptoms at once.
Cooling failure in Minneapolis–St. Paul is rarely random. It bunches on the first serious heat wave, again in the late-summer grind, and it concentrates where the equipment is oldest — the pre-1980 districts, 49.5% of the metro's housing — and where the newest subdivisions' identical units reach the same wear points in the same seasons. The technician who works these streets stocks the van for both patterns: the ageing system's slow decline and the young fleet's shared failures. It is why two Minneapolis–St. Paul homes of the same age, on different streets, so often need the same visit in the same year.
The local caseload behind this service is written in the climate figures: 702 cooling degree days a year and 12.1 days at 90 or above, pressing on a cooling fleet whose oldest members serve the 757,573 pre-1980 homes — in St. Paul (307,762 residents) as much as in the oldest districts.
One local habit worth copying: Minneapolis–St. Paul homeowners who mention their street's building era when they book get a better-matched visit, because a technician heading to a the 1980s home in Anoka County loads different parts than one heading to a new-build subdivision in St. Paul. The service is the same; the preparation is local.
A furnace announces its fault by where its startup sequence stops — inducer, ignition, flame proving or blower — and Minneapolis–St. Paul technicians diagnose by watching that sequence, not by replacing parts in a hopeful order.
There is a safety grammar to furnace repair in Minneapolis–St. Paul that every visit observes: combustion checked, venting verified, the exchanger's integrity read before comfort is discussed. A cracked exchanger or a lazy flame is not a comfort fault wearing a disguise; it is the one finding that changes the visit's whole direction. In a metro where 757,573 homes predate 1980 and their furnaces have been swapped into ageing duct systems more than once, that grammar is the difference between a repair and a recommendation — and honest technicians here will show the homeowner the evidence either way. Locally the workload concentrates where the stock is oldest — the districts built around the 1980s first.
Under Minneapolis–St. Paul's winters lie 7,654 heating degree days a year, and the furnaces answering them include the ageing units of the 757,573 pre-1980 homes alongside the electronic systems of the new subdivisions. The repair diary in Brooklyn Park reads both ends of that stock in a single week.
In Minneapolis–St. Paul this service is booked most often through the problem patterns at the top of this page — the metro's housing data, not habit, sets the order. If your home is in the 49.5% built before 1980, mention its age on the call: it changes the parts the technician loads before heading to Minneapolis and the rest of the metro.
An emergency is a trajectory, not a discomfort: temperatures heading somewhere unsafe, water in motion, an electrical fault worsening. Those failures cannot wait for a routine slot, and the response is sequenced accordingly.
Emergency demand in Minneapolis–St. Paul bunches, and the bunching is predictable from this page's data: heat waves load the ageing condensers of the pre-1980 districts, cold snaps find the tired igniters and cracked exchangers, storm weeks test every system the power surge reached. A local technician's emergency diary is the metro's housing and climate record with dates attached — which is why routed help, from a van already stocked for this stock's failures, is the fastest honest answer the night the system stops. That is the daily reality for the 1,458,896 households spread across Anoka, Carver, Chisago, Dakota, Hennepin, Isanti, Le Sueur, Mille Lacs, Ramsey, Scott, Sherburne, Washington, Wright, Pierce, St. Croix.
Scale the problem by the Census count: 1,458,896 households depending on systems that cannot be improvised around — no heat in a freeze, no cooling in a heat wave. The emergency visit exists for the hours when waiting until Monday is not a plan, in Woodbury this month, somewhere else next.
Where this service gets booked in Minneapolis–St. Paul follows the map on this page: the older districts generate the deep-end work, the post-2000 subdivisions the wear-and-tear work, and the 416,283 homes in between split the difference. Telling the call center your home's build decade — most Minneapolis–St. Paul owners know it within a few years — puts the right kit on the van the first time.
Method separates cleaning from stirring. Negative pressure on the whole network, agitation in every run, registers off and washed, the blower compartment cleared — anything less moves the dust from one room's duct to another's.
Ducts in Minneapolis–St. Paul collect what the metro's life sends through them: construction dust in the growth subdivisions, decades of household dust in the older districts, pollen riding the return air through long pollen seasons. The honest framing for cleaning is the system's condition, not a calendar — a duct system in a the 1980s home that has been remodelled twice carries a different load from one in a new build near St. Paul. The cleaning visit itself is agitation and extraction under negative pressure, register by register, with the blower compartment and coil inspected while access is open. Ask in Brooklyn Park and the answer rhymes with Minneapolis: same eras, same equipment generations, same calendar of failures.
Duct demand concentrates in the metro's long-biography homes: 757,573 pre-1980 systems that have carried decades of household air, and the renovated homes around Blaine (71,261 residents) whose construction dust is still in the runs.
In Minneapolis–St. Paul this service is booked most often through the problem patterns at the top of this page — the metro's housing data, not habit, sets the order. If your home is in the 49.5% built before 1980, mention its age on the call: it changes the parts the technician loads before heading to Minneapolis and the rest of the metro.
Honest limits, stated plainly: a tune-up does not make an old system new and cannot prevent every failure. It converts surprises into plans — which, across a system's life, is most of what reliability is made of.
Maintenance also has a paperwork virtue in Minneapolis–St. Paul: the recorded visit. Readings dated season by season — refrigerant pressures, temperature splits, capacitor values, the exchanger's noted condition — turn a system's decline from a surprise into a schedule. Households across Anoka, Carver, Chisago, Dakota, Hennepin, Isanti, Le Sueur, Mille Lacs, Ramsey, Scott, Sherburne, Washington, Wright, Pierce, St. Croix who keep those records meet replacements as appointments, and the technicians who write them are leaving the next visit, whoever makes it, a map of the system's life. In a metro of this size, that map is most of what local knowledge means. Count it in homes if you prefer: 757,573 built before 1980, 355,065 since 2000, one shared system of streets and seasons.
The maintenance caseload is the installed base itself: 1,530,451 housing units whose systems each face 12.1 hot days and 154.9 freezing nights a year. Around Eagan (68,158 residents) as in the old core, the twice-yearly visit is what stands between that calendar and the emergency diary.
In Minneapolis–St. Paul this service is booked most often through the problem patterns at the top of this page — the metro's housing data, not habit, sets the order. If your home is in the 49.5% built before 1980, mention its age on the call: it changes the parts the technician loads before heading to Minneapolis and the rest of the metro.
With a median build year of 1980, many Minneapolis–St. Paul systems are reaching replacement age together; the professional you are connected with inspects ducts and electrics across 224 ZIP codes before recommending equipment.
Heating installation in Minneapolis–St. Paul starts with a heat-loss calculation across Anoka, Carver, Chisago, Dakota, Hennepin, Isanti, Le Sueur, Mille Lacs, Ramsey, Scott, Sherburne, Washington, Wright, Pierce, St. Croix: the independent local professional measures the home's loss, inspects ducts and venting, and quotes the full scope before work begins.
From Minneapolis to Brooklyn Park, Minneapolis–St. Paul heat pump calls through TempReach USA reach a local professional who explains findings plainly and quotes after assessing — in the heating season and the cooling season alike.
Across 224 ZIP codes, Minneapolis–St. Paul mini-split systems installed through local professionals are commissioned zone by zone in heating and cooling, with the filter and drain routine handed over in person.
Across Anoka, Carver, Chisago, Dakota, Hennepin, Isanti, Le Sueur, Mille Lacs, Ramsey, Scott, Sherburne, Washington, Wright, Pierce, St. Croix, the housing split decides the starting point: older, leakier homes around Minneapolis usually need filtration and moisture work first, while tighter newer builds in the 224 covered ZIP codes usually need deliberate ventilation most.
From Minneapolis to the metro's edge, Minneapolis–St. Paul's 1,530,451 homes run every system type there is — single-stage furnaces, two-stage equipment, heat pumps with auxiliary heat — and each gets a control matched to its terminals, not a shelf guess.
In Minneapolis–St. Paul, commercial work follows the stock: 1,530,451 housing units' worth of mixed buildings — offices, retail and restaurants from Minneapolis across the 224 covered ZIP codes — each with rooftop units whose service rhythm the local professional sets per building.
Two patterns generate most of the bookings behind the services above: The refrigerant transition reaching older systems and furnace wear in hard cold. That is why the order of this page's service list is what it is — the services answering those patterns come early, and the rest follow in the order the metro's data supports. A homeowner whose home matches the local profile — built in the metro's big decades, in one of its older districts — is, statistically, reading their own shortlist.
PROBLEM
SOLUTIONPopulation 426,845
Population 307,762
Population 88,838
Population 84,349
Population 79,526
Population 76,945
Population 72,480
Population 71,261
Population 70,539
Population 68,158
Population 64,295
Population 63,348
Also in the Minneapolis–St. Paul metro: Eden Prairie (population 63,249), Apple Valley (population 55,696).
The communities in the grid are not suburbs of the page; they are its subject as much as Minneapolis is. St. Paul (307,762 residents) and Bloomington (88,838) carry their own building decades, their own equipment generations and their own positions in the problem ranking's logic — a system under a St. Paul roof answers to the same data as one in the centre, but to a different era of it. Coverage here is defined by the ZIP list below; understanding is defined street by street, and this page's figures are the metro-wide version of a story each community tells in its own numbers.
Also on the Minneapolis–St. Paul map: Brooklyn Park (84,349), Plymouth (79,526), Woodbury (76,945), Lakeville (72,480), Blaine (71,261) — communities spread across Anoka, Carver, Chisago, Dakota, Hennepin, Isanti, Le Sueur, Mille Lacs, Ramsey, Scott, Sherburne, Washington, Wright, Pierce, St. Croix, each with housing from its own growth years. A technician routed through TempReach USA to any of them is working from this same page: the metro data does not change at the city limit, but the housing on your street — its age, its equipment, its attic — is what the visit is really about.
Start with Minneapolis itself: 426,845 residents, 11.6% of the metro — the centre the rest of the map orbits. St. Paul (307,762) and Bloomington (88,838) form the next ring out, housing with its own building decades and its own equipment generations. Beyond them the metro thins into the smaller communities in the grid above, each a few thousand households deep — small in population, identical in one respect: their systems answer to the same eras and the same weather as the big city's.
The metro answers to 15 county governments (Anoka, Carver, Chisago, Dakota, Hennepin, Isanti, Le Sueur, Mille Lacs, Ramsey, Scott, Sherburne, Washington, Wright, Pierce, St. Croix), a patchwork that matters at permit time rather than at the thermostat. Anoka County carries the centre; the others carry the growth rings and the older outlying towns. A technician routed through this page works inside that patchwork daily — the weather does not care about the boundaries, but the job's paperwork does.
Three neighbouring coverage areas begin where this one ends: St. Cloud, MN, some 62 miles off; Rochester, MN, 87 miles; and Duluth, MN, 132 miles. Each keeps its own page because each keeps its own numbers — a different median build year, a different climate station, a different problem ranking. Boundary households should trust the ZIP list over the map: the code, not the compass, assigns the dataset.
The region around Minneapolis–St. Paul is a set of variations on its theme: St. Cloud, MN, 62 miles off, runs a median build year of 1984 on a metro population of 205,854; Rochester, MN (87 miles) medians 1984 on 231,184; Duluth, MN (132 miles) medians 1965 on 281,219. Nearness is not sameness — a few decades of median build year separate their heating and cooling as surely as the miles separate their maps.
Count the metro per unit of itself: 6,832 housing units per covered ZIP code; 97,260 households per county; 14 communities sharing 15 county governments. Then weigh the generations against each other — 2.1 older homes for each newer one — and the service pattern on this page stops being a list and becomes a proportion: that much of the diary written by ageing systems, the rest by young ones wearing in.
One line of Minneapolis–St. Paul arithmetic — a median home 46 years old · 1,034,357 owner-occupied homes against 424,539 renter-occupied · 1,804 pre-1960 homes for every covered ZIP code · a heating-to-cooling degree-day ratio of 10.9 · 780 mm of rain in an average year.
County pages carry the local detail — land area, climate normals and the heating and cooling pressures on the ground in each county.
More plain-language help: the TempReach USA heating & cooling guides
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