Tehhund@lemmy.world 2 weeks ago
What kind of unit is the central system - heat pump? Resistive heating?
There are a lot of details we’d need to determine this, so I don’t think we can give you a firm answer. But heat pumps are dramatically more efficient than resistive heating, so if the central system is a heat pump that’s probably the right answer. If the central system uses resistive heating then it’s probably not much more efficient than the small heater.
BackOnMyBS@lemmy.autism.place 2 weeks ago
It’s a central a/c unit that has a heating kit.
Tehhund@lemmy.world 2 weeks ago
Yeah that looks like resistive heating, so there’s no reason to think it’s more efficient than the small heater which definitely uses resistive heating. It’s impossible to know for certain but my gut says the small heater is the right call - since you’re heating a smaller area, there’s less surface area to lose heat from, and heat losses are what drives heating costs.