Frame Walls

Frame walls (Figure 3-12), with either wood or metal studs, are commonly insulated with rolls and batts of mineral, glass, or wood­fiber insulation material. Sprayed-on or foamed-in-place rigid insu­lation is also being used more and more. Whatever the insulation decided upon, exterior opaque walls and walls between separately heated units should have a maximum U-factor of 0.007, which will require insulation rated at R-11 or greater (see Table 3-5). A ther­mal resistance of R-11 can be provided by 31/2-in fiber batts or other equally suitable materials.

Posted in Audel HVAC Fundamentals Volume 1 Heating Systems, Furnaces, and Boilers