FavoritePlease sign in to add this to your favorites. Topic: Whole Building Ventilation Subtopic: Special Considerations Desired Outcome: Regional climatic variables are taken into consideration Multifamily HomesPrintCopy to ExcelEmail TitleSpecification(s)Objective(s) 6.6288.3a Very cold Energy recovery ventilators will not be installed in very cold climates unless they are equipped with frost controlsA filter will be installed before heat recovery ventilator ( HRV HRV Heat recovery ventilator )Ventilation ducts will be insulated to a minimum of R-19 Prevent freezing of ventilatorEnsure the ventilation system remains clean and operates properly Ensure condensation does not form on or in the ductwork 6.6288.3b Hot humid HRVs will not be installedVentilation air intake will not be terminated at roofDetermine whether net latent load from ventilation (both natural and mechanical) requires dehumidification; if so, install dehumidification. See SWS 6.6203.2 Dehumidifying Ventilator Serving Multiple Dweeling Unit (All Building Types) and SWS 6.6203.3 Dehumidifying Ventilator Serving Single Dwelling or Special Use Space (All Building Types) Avoid low energy recovery equipmentPrevent excessive heat entering ventilation air Previous Detail Back to 6.6288 Special Considerations Back to Top