Everyone is being very short sighted about this proposal. Heat pumps are capable of large commercial buildings and residential buildings because the mass of the building keeps more of the units/spaces warmer than a single family home. Where heat pumps struggle is when it's 0F or below for a single family home. ALSO - the final electrification component isn't required for 25 years. That's a lot of time for technology to improve. I follow a guy that is working right now and has prototypes in people's homes that use CO2 refrigerant for it's heat pump boiler and it's getting 180F so the technology is there and will be here well before 2050. Another point is that before 2050, all the equipment in every condo building in Evanston is going to be replaced. So this argument about the amount of money that will impact residents is really off. You have to look at what's called incremental costs. If replacing the condo building boiler is $100,000 they have to do that because it's old and failed. If they spend $125,000 to put a heat pump boiler in, the only added cost is $25,000 to the owners. It's a big difference.