I feel like we live in the same building with an ancient boiler and HOA neighbors who are extremely cost sensitive!

I do wonder if there's a reasonable heat pump retrofit for old buildings with boiler-based heating. Ultimately you're just heating up a liquid and pumping it through everyone's radiator, right? Seems like a sensible product given the number of old buildings with this kind of heating.

Edit: And here it is! https://electrek.co/2022/01/05/these-new-affordable-electric...