That doesn't square with the fact that new rentals are built with granite countertops and stainless-steel appliances. Tenants do shop around on the basis of amenities.
Sure, but those amenities are highly visible. Lots of units have a stainless dishwasher exterior, but most will still be the landlord-special plastic tub inside. Who is shopping around based on whether or not there’s a heat pump? I would consider myself relatively well-educated on this and still the heat/cooling source is an afterthought.
Honestly the ductless mini split system in my new apartment was a big factor for me. But it was the first time I'd seen one over here in the mid-atlantic.
The combination with air conditioning and dehumidifying is genuinely compelling for the simplicity. Especially in new construction.
But these things trickle down to renters last. And if the landlord installs it, you bet your ass the rent is going up more than your savings on electricity.
Lose lose lose, if it gets installed then the current residents probably get priced out anyway. It eventually trickles down but we could do so much better.
