Is electric resistance space heating allowed by the Energy Code when using the performance method of compliance?
Yes. Electric resistance space heating is allowed when using the performance method of compliance. Low-rise residential standard design is based on a heat pump system.
Is electric resistance space heating allowed by the Energy Code when using the prescriptive method of compliance?
No. Electric resistance space heating is not allowed when using the prescriptive method of compliance. There are no exceptions for low-rise residential prescriptive compliance. If electric resistance is used for low-rise residential buildings, the performance method of compliance must be used.
Is there an exception for any building occupancy allowing the use of electric resistance space heating if the authority having jurisdiction (AHJ) passes an ordinance banning or restricting the use of natural gas space heating?
No.
Is there an alternative to electric resistance space heating if the AHJ bans natural gas?
Yes. An alternative to natural gas space heating is an electric heat pump system. Heat pumps are allowed prescriptively by the Energy Code for all building occupancies for new construction, additions, and alterations, even when natural gas is available
How does the new definition for natural gas availability apply to low-rise residential buildings?
It mainly applies to additions and alterations, since the 2019 Energy Code allows for an all-electric pathway in newly constructed low-rise residential buildings.
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