MrHVAC.com Heat Gain and Loss Short Form Load Calculator

HEAT GAIN AND LOSS SHORT FORM FROM MrHVAC.COM
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STEP 1: Customer Information
Name		Phone
Address		City
State		Zip
Job

STEP 2: Design Temperatures
	Inside	Outside
Winter	Deg F	Deg F
Summer	Deg F	Deg F

STEP 3: Construction Details
Gross Wall	SqFt
Ceiling	SqFt
Floor	SqFt
Infiltration	Vol Cu Ft Fireplaces
Duct Gain/Loss
PEOPLE	(Assume two persons per bedroom)
APPLIANCES

BTUH Loss	Heating Factor	Description	Cooling Factor	BTUH Gain
STEP 4: Additional Items
		1.
		2.

STEP 5: HEATING: DOORS & WINDOWS (per 10 deg F) For sliding glass doors - use factors for the same type window
Window & Door Types	Frames	Area	BTUH Loss
1) Single Pane Clear
2) Single Pane With Storm
3) Double Pane Clear
4) Double Pane With Storm
5) Triple Pane Clear
6) Jalousie Single
7) Jalousie Single w/storm
8) Skylights Single
9) Skylights Double
10) Door Wood Only
11) Door Wood w/Storm
12) Door Urethane Core (R-5)
13) Door Urethane Core (R-5)w/Storm
TOTALS

STEP 6: COOLING: DOORS & WINDOWS (per 10 deg F) Table assumes windows have inside shading by draperies or Venetian blinds and sliding glass doors are treated as windows
Direction	Panes	Temp Diff	Area	BTUH Gain
1) N
2) NE & NW
3) E & W
4) SE & SW
5) S
6) Skylights
7) Wood Door
8) Metal Door
TOTALS

STEP 7:

WE CANNOT PROVIDE TECHNICAL SUPPORT FOR THIS FREE UTILITY.

If you require support or need more power, we have our own fantastic heat gain and loss program called Easy Load Calc. It is inexpensive (for now) but contains all of the features most of us need. Please check it out here.