San Francisco County Heating & Cooling Services

The San Francisco County climate record

The climate figures on this page are the primary metro's NOAA 1991-2020 normals — climate normals recorded at SAN FRANCISCO DWTN, CA US, the station for the San Francisco metro this county belongs to. An average year there brings 2,781 heating degree days, 121 cooling degree days, 22.89 inches of precipitation, 3.3 days at 90 degrees or above and 0.0 nights at or below freezing, around an average temperature of 57.7 degrees.

Heating writes this county's HVAC calendar. With 2,781 heating degree days against 121 cooling degree days in the normals recorded at SAN FRANCISCO DWTN, CA US, the systems across San Francisco County earn their keep in the cold half of the year: furnaces and heat pumps cycling through 0.0 nights at or below freezing, when a breakdown stops being a comfort problem and becomes a household one. The pressure shows up as midwinter failures on the oldest equipment first, and a maintenance calendar that has to be kept in autumn — because by the time the cold arrives, the county's systems are already on stage.

Set the county inside its metro and the picture completes. San Francisco County answers to the San Francisco metro's data — its housing profile, its problem ranking, its climate station — but the county is where that data touches ground: 0 communities, 28 ZIP codes, one county's worth of systems ageing under the record kept at SAN FRANCISCO DWTN, CA US. This page is that ground-level reading, kept separate from the metro page so the local detail is never averaged away.

There is a scale fact hidden in San Francisco County's ZIP codes: 28 codes across 47 square miles works out to 1.7 square miles per code, which makes a service call here a matter of ground as well as of systems. The codes on the metro-facing side of the county — the county sits west of the San Francisco metro's centre — and the codes at its far edge hold different ground, but both ends ask the same climate questions of their heating and cooling, at different distances.

Position first: San Francisco County lies west of the San Francisco metro's centre, roughly 34 miles from the metro's centre as the map measures it, with Alameda County, Contra Costa County, Marin County among the counties around it. Neighbourhood at county scale matters to heating and cooling because systems do not respect the border — the same subdivisions' building decades continue across it, the same cold snaps and heat waves examine both sides in the same night — while each county's page, this one included, keeps the local figures distinct.

A service calendar for San Francisco County can be written straight from its station record. Spring belongs to the cooling plant: 121 cooling degree days are coming, and the systems that will carry them are checked before the first of the 3.3 hot days arrives. Autumn belongs to the heating plant, ahead of 2,781 heating degree days and 0.0 freezing nights. The middle weeks belong to the unglamorous work — filters, drains, duct joints — that both seasons quietly depend on. The record at SAN FRANCISCO DWTN, CA US does not change much year to year, which is what makes the calendar worth keeping.

Communities and housing in San Francisco County

Because the record names no separate places in San Francisco County, this page reads the county the way its technicians meet it: by ground. 47 square miles of California, a centroid west of the San Francisco metro's centre, weather read from SAN FRANCISCO DWTN, CA US, and housing spread through the county rather than concentrated in listed communities. The systems in that housing face the same degree days as the rest of the San Francisco metro; what the county changes is the spacing between them, and spacing is a real part of how service works here.

The growth figures deserve their own reading in San Francisco County. 14.0% of the San Francisco metro's homes were built since 2000 — the largest or near-largest band in many of its counties — and those homes are now old enough that their first systems are reaching replacement age together, subdivision by subdivision. Set against them, the 67.5% of the metro's stock that predates 1980 is deep into its second and third systems. One county, two replacement waves running at once, and a maintenance diary that has to serve both.

Coverage, for San Francisco County, is a set of overlapping maps. The land map is 47 square miles. The address map is 28 ZIP codes and 0 listed communities. The service map is the San Francisco metro, whose coverage the county sits inside — west of the San Francisco metro's centre, roughly 34 miles from its centre. The weather map is one station's record, kept at SAN FRANCISCO DWTN, CA US. A home in this county lives on all four maps at once, and its heating and cooling needs are set by the combination.

Our role in San Francisco County, stated plainly

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.