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2) At all interconnections between concealed vertical and horizontal spaces such as occur <br />at soffits, drop or cove ceilings, etc. <br />3) In concealed spaces between stair stringers at the top and bottom of the run and wall <br />cavities in line with the stringers; <br />4) At openings around vents, pipes, ducts, chimneys and fireplaces at ceiling and floor levet, <br />with noncombustible materials. [Sec. 602.7] <br /> <br />7. ENERGY PATH #1 is based on R-21 wall insulation, R-25 underfloor insulation, R-30 vaulted <br />ceiling insulation, R-38 fiat ceiling insulation, R-21 basement walls, R-15 slab floor edge <br />insulation, R-8 forced air duct insulation, 0.40 U-value window class, 0.50 U-value skylight class. <br />054 U-value main entry door, (with a maximum area of 24 square feet) all other exterior doors, <br />including the door between the heated dwelling and the unheated garage, 0.20 U-value <br /> <br />planrevu\97-05603.wps <br /> <br /> <br />