The county-level homework for Franklin County, Ohio — its 532 square miles, its 43 ZIP codes, its place inside the Columbus metro's coverage. TempReach USA connects homeowners here with independent local HVAC technicians; the record behind the routing is on this page.
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Franklin County in one paragraph: 532 square miles in Ohio, 43 ZIP codes, a heating climate pressure read from the normals at COLUMBUS PORT COLUMBUS INTL AP, OH US, and housing that answers 5,233 heating degree days against 1,068 cooling degree days a year. TempReach USA is a referral service, not an HVAC company — one call connects you with an independent local HVAC technician serving this county.
Read Franklin County's weather the way this page reads it: through the thirty-year normals kept at COLUMBUS PORT COLUMBUS INTL AP, OH US for the Columbus metro. Those normals give the county 1,068 cooling degree days and 5,233 heating degree days a year, 41.57 inches of precipitation, 20.7 days at 90 degrees or above, 103.2 nights at or below freezing, and an average temperature of 53.5 degrees — the fixed background every system in the county works against.
There is a second heating pressure in Franklin County that the degree days only imply: repetition across distance. A cold snap does not visit one street here; it visits all 43 of the county's ZIP codes in the same night, from the communities nearest the metro's centre to the edge of its 532 square miles, and every ageing system in that ground is examined by the same low temperature at the same hour. That simultaneity — many systems, one weather, a county's worth of roads between the calls — is what makes the cold weeks in a heating-profile county feel different from the same weeks in a city.
Set the county inside its metro and the picture completes. Franklin County answers to the Columbus metro's data — its housing profile, its problem ranking, its climate station — but the county is where that data touches ground: 9 communities, 43 ZIP codes, one county's worth of systems ageing under the record kept at COLUMBUS PORT COLUMBUS INTL AP, OH US. This page is that ground-level reading, kept separate from the metro page so the local detail is never averaged away.
43 ZIP codes reach into Franklin County's 532 square miles, among them 43002, 43004, 43016, 43017 — an average of 12.4 square miles of county ground per code. The codes are more than a mailing grid here: they are how the county's service ground divides in practice, each code holding its own mix of housing eras, its own streets of systems ageing on their own schedules. A call in one code and a call in the next can be the same fault in different decades of house.
Franklin County sits alongside Delaware County, Fairfield County, Hocking County in the Columbus area — 9 neighbouring counties share its coverage map in all, and the borders between them are lines on a map rather than changes in the weather. The same station record travels across those borders, the same housing decades appear on both sides, and a technician's ground here is really the cluster: this county and its neighbours, read together, with this page keeping Franklin County's own share of the picture separate.
There is a geography to Franklin County's seasons that the totals flatten. The county lies west of the Columbus metro's centre, roughly 9 miles from the centre the record is measured against, and its 532 square miles do not meet a hot week or a cold snap in one voice: the ground nearer the metro and the ground at the county's far edge live the same 20.7 hot days and 103.2 freezing nights through different housing, fitted in different decades. One station record, one county, two ends of every season.
Start the county at its named places: Columbus, Dublin, Grove City, Reynoldsburg head a list of 9 communities recorded in Franklin County. The list matters to heating and cooling because communities concentrate the housing — a street of homes built in one decade produces one kind of service diary, the next community's different decade produces another — and because the roads between the named places are part of the working day here. The county page's climate record is shared; the ground it lands on is divided among these names.
Census figures give Franklin County's heating and cooling its proportions. The metro it belongs to counts 915,425 housing units across 855,292 households, 61.3% of them owner-occupied, and the era mix runs 24.8% before 1960, 23.8% from 1960 to 1979, 26.4% from 1980 to 1999 and 25.0% since 2000. A county inside that metro inherits the mix in its own proportions — which is why two homes on the same Franklin County street, built forty years apart, can need entirely different conversations from the same technician.
One way to hold Franklin County in mind is as the local layer of a wider dataset. Above it sits the Columbus metro, with its Census housing profile and its NOAA station at COLUMBUS PORT COLUMBUS INTL AP, OH US. At this level sit the county's own numbers — 532 square miles, 9 neighbouring counties, 43 ZIP codes, 9 listed places — and below it, not published anywhere, sit the individual homes whose systems all of it describes. This page works at the middle level, where the data is still local enough to act on.
City pages carry the metro-wide homework — housing eras, the problem ranking, services in depth. This county sits inside their coverage.
Population 906,480
Population 49,031
Population 41,831
Population 41,032
Population 38,543
Population 36,560
Population 36,319
Population 35,438
Population 19,974
TempReach USA is not an HVAC company. We employ no heating or cooling technicians, we run no service trucks, and we do not carry out HVAC work of any kind. This website and its call center exist for one purpose: to connect homeowners with independent local heating and cooling professionals who serve their area. When you call the number on this site, your call is routed to such a professional. From that point, everything about the job belongs to that professional and to you: the assessment, the work itself, the scheduling, what you are charged, and the terms of any agreement you reach. The professional who takes your job is solely responsible for it. The technician who arrives at your home runs their own business; they are not an employee, agent or subcontractor of TempReach USA. Our part is the information on these pages — assembled from Census Bureau housing data and NOAA climate records for each metro — and the routing of your call. We state this plainly on purpose: you should know exactly who you are hiring before anyone picks up a wrench or a gauge.
One call connects you with an independent local heating and cooling professional serving Franklin County and the Columbus metro.
Call center hours: Mon-Fri 7:00 AM-10:00 PM ET | Sat 8:00 AM-10:00 PM ET | Sun 7:00 AM-9:00 PM ET