Hello All, I appreciate the good info on this site... I'm looking for a basic program to allow me to approximate the Heat and Cooling load on an ICF home to be built around Annapolis, MD. I'm not looking to do the HVAC design work myself, but rather be in a better position to speak with the HVAC guys during the quoting and install process. Do any of you have any recommendations for a decent calculator that I could use to learn the basics? I've seen a few other members use this calculator. Any opinions? http://www.hvaccomputer.com/hvac/tofc2.asp Thanks in advance, C2

Here is the software that you can order online:

HVAC Sizing for Concrete Homes

Here is a link that discusses how the software was developed and how to use it:

HVAC Sizing Methodology for Insulated Concrete Homes

Perfect! Thanks very much.