Ruffneck™ Heat Loss Calculation Tool

Go to Metric Version
Client Information
Project Name: Company Name: Contact Name:
Building Measurements
Outside Temp.: (°F) Length: (ft)
Inside Temp.: (°F) Width: (ft)
Air Changes/hr: (ACH) Height to Eaves: (ft)
Exhaust Fan: (CFM) Gable Height: (ft)
    What's Gable Height?    


Wind Speed: MPH Shielding:


Opening Unit Width Height Qty Standard Material Type U-Factor
Window 1: ft
Window 2: ft
Man Doors: ft
Dbl Doors: ft
O/H Doors: ft
Louvre Vent: ft
Ridge Vent: ft
Other: ft
Standard Material Types:
Exterior Wall Types:  
Ceiling Types:  
Floor Types: