Verified Climate Data • Zip 79401
HVAC Load Calculator for
Lubbock Homes
Summer Design95°F
Winter Design20°F
Humidity Loadmedium
Local Climate Analysis for Lubbock
Lubbock typically experiences summer highs reaching design temperatures of 95°F. With moderate humidity, standard sizing rules apply, but insulation quality remains critical.
📊 Energy Usage Profile
Cooling Demand (CDD)2417
Days you need AC
Heating Demand (HDD)2979
Days you need Heat
⚙️ Technical Factors
Wet Bulb68°F
Standard humidity management sufficient.
Elevation3,202 ft
⚠️ Gas Furnace Derate: -13%
Manual J Tip for TX
Because the design temperature difference (Delta T) in Lubbock is approximately 20°F (Summer) and 50°F (Winter), your system may need to be sized primarily for one extreme season over the other.
Installation Cost in Lubbock
Local labor rates and equipment standards in TX influence the final quote. For a standard 3-ton system changeout in Lubbock, calculate roughly $1,800 - $2,200 per toninstalled, depending on whether you choose a single-stage or variable-speed inverter unit.