Agenda - 12-15-1998 - 9a - Laserfiche WebLink

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1 8 ' NCHFA HOUSING REHABILITATION PROGRAMS -- Energy Standards cross-sectional area or throat; and, 7) allow for insulating supply and return ductwork per Section 2.5, above. Metal ductwork with exterior insulation is preferred. A-copy of the duct design calculations and drawings shall be retained in the clients case file. In no case should the building envelop or framing be used as part of the duct system. 5.7 No dwelling rehabilitated with Program assistance shall retain any unvented combustion appliance after rehabilitation. 5.8 Any existing wood-burning space heater should be replaced unless it is: 1) certified by the U.S. Environmental Protection Agency (EPA) to meet 1990 emissions regulations; or, 2) air-tight and equipped with a thermostatically-controlled damper/air intake (e.g., Rite-way, Ashley, etc); or, 3) air-tight and equipped with a secondary combustion chamber and/or a catalytic combustor (e.g., 3otul, Country Comfort, etc.). 5.9 If it is the owner's preference that an existing space heater be replaced with a wood-burning space heater, the new unit must be certified by EPA. The Recipient must retain a copy of the EPA label in the client's case file. Any installation of a wood-burning heater should include direct piping of combustion air into the stove, essentially decoupling the combustion air/combustion products from the air inside the house. 6.0 Ventilation Systems. 6.1 All units rehabilitated with Program funds must be ventilated per ITC State Residential Building Code, at a minimum. Each unit should be evaluated individually to determine potential need for additional ventilating. A minimum of one square foot (SF) of free vent area per 150 SF attic floor area is recommended. Where new roof covers are indicated, continuous ridge-and-soffet vent systems should be considered. Powered attic ventilation systems should be installed only as a last resort. When the installation of foundation vents is indicated, thermostatically-controlled "automatic" foundation vents are preferred. 6.2 Units being "wrapped" in vinyl or aluminum siding as part of their rehabilitation may need increased soffit/attic ventilation to compensate for the increased tightness of the unit's envelope. Use continuous perforated siding under all soffits. 6.3 Where practicable, all bathrooms and kitchens in units rehabilitated with Program funds shall be fitted with exhaust fans which are vented to the exterior and equipped with backdraft dampers. Four-inch insulated vent ducts are recommended for bath exhaust fans. Kitchen vent ducts should also be insulated. Combustion appliances in conditioned space should be tested for carbon monoxide 8