![]() ![]() R (transmission resistance) = 1 / U (transmission conductance) in BTU per hour. They can be combined on the same worksheet of course, but I wanted to keep typical runs on a single 8-1/2 x 11 page. I made separate sheets for gain and for loss so that I could keep them open together and run the results independently. Free programs are OK as far as they go, but they're not expandable. Commercial programs work OK and are expandable, but they're not free. I needed to estimate the heating and cooling loads for my church's worship space. I designed these calculators in frustration over the lack of available simple calculators that are expandable in complexity. I'm not an HVAC engineer, just a guy who needed to verify estimates from contractors and who was curious. These calculators are not copyrighted - use them freely as you wish. ![]() ![]() These Excel spreadsheets can be used with any spreadsheet program that opens Excel (.xls) files, such as OpenOffice. Most recent update 6-16-2013 Calculators for estimating heating and cooling system capacity requirements,īy calculating structure heat losses (heating) and gains (cooling)ĭownload calculators in Excel. ![]()
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