KJT Mechanical
Rebate Finder
Heat Load
kjtmechanical.com
Heat Load
kjtmechanical.com
Heat Load Estimator (Boulder County)
Quick, rough sizing only — not a Manual J. Good for ballpark planning in Boulder County’s climate.
Conditioned square footage
Ceiling height (ft)
Insulation / envelope
Average
Good / modern
Poor / older
Window quality
Average
Good (double/low-E)
Poor (single/leaky)
Window area (% of walls)
Main orientation
Mixed
South
West
East
North
Air tightness
Average
Tight
Leaky
Occupants
Kitchen near main area?
No
Yes
Estimate
Reset
