Verified Climate Data • Zip 94102
HVAC Load Calculator for
San Francisco Homes
Summer Design74°F
Winter Design43°F
Humidity Loadmedium
Local Climate Analysis for San Francisco
San Francisco typically experiences summer highs reaching design temperatures of 74°F. With moderate humidity, standard sizing rules apply, but insulation quality remains critical.
📊 Energy Usage Profile
Cooling Demand (CDD)136
Days you need AC
Heating Demand (HDD)3194
Days you need Heat
⚙️ Technical Factors
Wet Bulb60°F
Standard humidity management sufficient.
Elevation52 ft
No derating needed.
Manual J Tip for CA
Because the design temperature difference (Delta T) in San Francisco is approximately 0°F (Summer) and 27°F (Winter), your system may need to be sized primarily for one extreme season over the other.
Installation Cost in San Francisco
Local labor rates and equipment standards in CA influence the final quote. For a standard 3-ton system changeout in San Francisco, calculate roughly $1,800 - $2,200 per toninstalled, depending on whether you choose a single-stage or variable-speed inverter unit.