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Backup heating coils for slim ducted heat pump blowers? – GreenBuildingAdvisor
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Expert Member You have to check the installation of the manual of your specific unit. Some of them have the option to drive a backup coil including programming of when to engage it.
If your unit does not have the option, you can still use the duct heater but it gets complicated. I would try to find a unit that supports a duct heater. Usually the multi position air handlers can take a heat strip.