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Dual fuel control for Mitsubishi heat pumps
Last fall I had Mitsubishi heat pumps installed for air conditioning and efficient heat - an MVZ-AA7, MSZ-GL and two MFZ-KJs - complementing an existing 3-zone modern Bosch greenstar hydronic baseboard propane boiler system. In the winter, I primarily use the heat pumps for heating, but when the temperatures get below 10F, I would like to automatically switch from the heat pumps to the boiler.
What are thoughts on the easiest way to accomplish this? Using Kumo Cloud would seem to work (with a Kumo station to override calls for heat above a given temp) - but then I'm still keeping separate thermostats for both systems. Not very slick looking but could work.
One of my Mitsubishi units already has the MRCH1/MIFH1 RedLINK remote control system – If I upgraded all the Mitsubishi controls to RedLINK controls, could I use something like a Honeywell HZ432 panel to manage the system?
Thanks for your experience.