Archive for 02/09/2009

i decided to go ahead a compile my research in a post… this was hours and hours of weeding out the useless articles i found… hope this benefits someone! ūüôā¬†

icf wikipedia 

the “icf effect” on hvac design

maximizing icf performance

icf myths debunked

forum (second to the last as most helpful for me)

foam forms bring concrete results

icf forum on geothermal heat pumps and more

we need to have ALL the quotes done and plans ready in the next week or two. we’ve been speaking with an hvac guy for weeks now who we had planned on using. he just let us know he wasn’t going to be able to (which i respect! he has a family too! :)).

ahhhhh! so i feel like going crazy since one of our HUGE quotes isn’t in yet. *sigh*¬†

this just isn’t a typical house that you can use typical tonnage figuring to get unit size and such. we don’t feel like we can just call someone up and tell them the sq footage and window brand and count and get a quote. since many people don’t use icf’s to the trusses it’s not common for them to know that the tonnage figuring is not the same! if we get a unit that is too big then we aren’t saving on our monthly bills at all and it will typically cost us more! *sigh* this is not what the hvac guy wants to hear. the bigger the unit the more money he makes. typically they want to put two units in, 1 each floor. i’m not down with that either.¬†

i’ve been researching again this morning, hoping to find an icf home tonnage calculator. nope. but i did find an article quoting richard rue that said traditionally you figure 1 ton of air per 400 sqft and in an icf home you figure 1 ton of air per 750-1250 sq ft. HUGE difference!! if the unit short cycles (runs for a very short period of time more frequently) it will never run long enough to keep the humidity levels low enough in the house. (which is typically what people want in their homes, short cycles). we also need a fresh air exchange with a complete manual/electric shut off/damper and additional humidifiers¬†dehumidifiers.¬†

how do we find an hvac guy who will do what we say and basically totally disregard everything he’s ever done or known…

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