We put in heat pumps this winter for a backup heat and dehumidifier option in summer. The basement was much cooler without the furnace and pipes carrying hot water all the time. Anytime it was below 0 degrees the heat pumps could not keep up, they’d work but if set at 68 the space would be 58 and they were working hard. Burned a lot less fuel but had a very cold basement and some comfort trade offs on the extreme days.