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Steve Andrews User is Offline

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Posts:334

06/16/2000 7:32 PM
Question: could a few folks share the methods your HVAC people use for sizing equipment in SIP homes? Manual J calcs or "rules of thumb"? Could you give some quick examples of sizing and house features (R-values of walls, roofs, windows, foundation and ___ Btu size of heating plant; __tons of cooling)? Here's the concern: a recent study of 40 near-new homes in Fort Collins found that HVAC systems averaged nearly twice as large as they needed to be. Most importantly, the most efficient homes were more likely to have their HVAC equipment more seriously oversized than the less-efficient homes. Old rules of thumb seem to be ruling the day. This has the potential to be a worse problem in a SIP home than in a stick-framed home.

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