Two water heater system
The current water heater in my house is a 32 gallon Buderus boiler mate, on a zone from the oil burner. The main house foundation is 24’ x 36’, 10” concrete walls, all except the top 16” is below grade. No insulation on the walls, yet. An addition off the north 24’ wall is 18’ x 30’ built with ICF foam blocks. There is an opening between the two foundations 8’ square.
We heat the house in winter with a remote high efficiency wood boiler (mid Nov – mid April) that is piped into the existing oil boiler to utilize existing pumps and controls.
We have just purchased a Rheem 40 gallon electric hybrid heat pump water heater, and the plan is to use the Buderus in the winter, and the Rheem in the months of no heating requirements. The basement is dry year around, but we use a dehumidifier to keep humidity levels around 45-50% due to many pieces of woodworking equipment with cast iron work surfaces.
The question is, do we shut off and drain or leave filled whichever water heater is not in use for the season?
Thank you for your time and consideration.
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