Chapter 05E Energy Conservation Code

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E NERGY C ONSERVATION C ODE§5E-2-1 Thermally isolated None As proposed sunrooms Air leakage rate of 5 air changes per hour For residences that are in climate zones 1 and 2, and 3 air changes not tested, the same air per hour in climate zones 3 through 8 at a leakage rate as the pressure of 0.2 inches w.g (50 Pa). The standard reference mechanical ventilation rate shall be in design. addition to the air leakage rate and the For tested residences, the Air exchange ratesame as in the proposed design, but no measured air exchange a greater than 0.01 × CFA + 7.5 × (N+ 1) rate. br where: The mechanical b CFA = conditioned floor area ventilation rate shall be = number of bedrooms N in addition to the air br Energy recovery shall not be assumed for leakage rate and shall be mechanical ventilation. as proposed. None, except where mechanical ventilation is specified by the proposed design, in which case: Annual vent fan energy use: Mechanical kWh/yr = 0.03942 × CFA + 29.565 × As proposed ventilation + 1) (N br where: CFA = conditioned floor area N = number of bedrooms br IGain = 17,900 + 23.8 × CFA + 4104 × N Same as standard br Internal gains (Btu/day per dwelling unit) reference design Same as standard reference design, plus any additional mass An internal mass for furniture and specifically designed as a Internal mass contents of 8 pounds per square foot of c thermal storage element floor area but not integral to the building envelope or structure. For masonry floor slabs, 80 percent of floor area covered by R-2 carpet and pad, and As proposed 20 percent of floor directly exposed to room air. For masonry basement walls, as proposed, Structural mass but with insulation required by Table As proposed R402.1.4 located on the interior side of the walls For other walls, for ceilings, floors, and As proposed interior walls, wood frame construction SUPP. 9 (1-2021) 5E-23