How big is your building?

Enter building dimensions.

Length (ft) 

Width (ft) 

Ceiling Height (ft) 

How many air changes do you need? (use table at right for reference)

Air Changes 

How much temperature rise do you need? (difference coldest or hottest outside temp to desired indoor temp)
Click here for reference chart

Rise (degrees F) 

Approximate CFM needed = 

but call us for a customized quote

Approximate BTU =