What’s the payback?
I read here over and over again the recommendation that a house should be built tight and ventilated. The house should also have insulation levels over what is required and what is typically done. I’m good with that if it makes sense. I’m sure someone has done some studies in various climates and calculated the savings and the simple (or not so simple) payback for the upgrades, but I’m not finding it. What makes sense?
My case, climate zone 5, new 2000 SF home, cheap natural gas. No AC. Colorado, lots of sun. Conservative habits, turn off lights, keep tstat low.
I’ve seen the recommendation here for R-60 ceilings, R-40 above-grade walls, R-20 basement walls, and R-10 basement slabs. What are the economics for going so high? I see here: https://www.greenbuildingadvisor.com/green-basics/insulation-overview, that the DOE recommendation is R 16-27 walls. Typical here is still just 2×6 with fiberglass (or foam) in the wall, no foam, or maybe 3/4″ on the outside, so that meets DOE levels.
What about air infliltration? What would a typical leakage level be? How tight can you build it and not add ventilation? What are the costs and savings for building tight, doing a blower door test, and adding ventilation? Are there some codes and procedures for building air tight?
Sorry, too many questions 🙂
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