A wooden storm door would no longer be cost-effective, nor would insulating window shutters, and both were dropped from the package. ... In climates with 4000 to 6000 degree-days a year: Minimum attic insulation is R-30 and may be as high as R-38, if fuel prices are high. ... At todaya#39;s energy prices, natural gas ranks as the cheapest fuel, on the average, it Figure 1-11: By making a wide array ofanbsp;...
|Title||:||Solarizing your present home|