Backup heat for heat pumps
I have a slim ducted fujitsu heat pump and a Bosch one, the ones that look like harmonica.
Can backup heating coils be installed with these kinds of heat pump blowers as a backup as described in this GBA article:https://www.greenbuildingadvisor.com/article/an-avoidable-downside-to-heat-pumps ?
Where do they get installed? (inside the unit, the supply plenum, somewhere else)
Thanks,
Luke
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Replies
I would be installed down stream of the heat pump.
I do not think Fujitsu makes an add on kit.
There are generics strip heaters but integrating them into the Fujitsu controls seems unlikely. A standard thermostat could work but you would lose compressor modulation.
https://voomisupply.com/products/10-kw-electric-duct-heater-240-1-60-1-stage-24v-control?currency=USD&variant=32045525794927&stkn=5587a5a64bed&gQT=1
Walta
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.