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The answer is here (part of the homeowner's FAQ).
11/27/2007 01:27:00 AM
heat load calculation,
Heat loss calculation is a load calculation of the transfer of heat loss or gain through your buildings insulation. There are many ways used for years but I would only recomend ACCA Manual J protocol. With our unique, more energy efficient building practices and code submittals using Manual J worksheets should be computerized. Some projects would take too much time even for some of the best in the industry. Two software programs that I would suggest would be Wrightsoft or Elite by an experienced proffesional. Hope this helps.Your HVAC friend,Larsen Tech, Inc.http://www.larsentech.orghttp://www.larsentech.org