Ben Zanin in Elk: "@casseagull I think @aphyr has a cleverly..."

Heat pump pals in Ottawa, do you also have a furnace? Do you ever find that your heat pump isn't working enough at the colder temps (say -20s?)?

I think @aphyr has a cleverly designed climate control system that balances a heat pump for primary climate control duty with at least one supplementary system that kicks in when needed, but I also think he's at a conference right now and very tired so he might not see this tag for a couple of days.

June 20, 2025 at 5:40:08 PM

@gnomon @casseagull heat pump here plus resistive aux heat in the air handler. Same deal, kicks over to aux heat around 0 degrees F. I should have insisted on cold climate heat pumps.