Heating, cooling, and electrical upgrades include the following improvements:
- Central air conditioners
- Natural gas, propane, or oil water heaters
- Natural gas, propane, or oil furnace or hot water boilers
- Improvements or replacement of panelboards, subpanelboards, branch circuits, or feeders
- Electric or natural gas heat pumps and heat pump water heaters
- Biomass stoves and biomass boilers
Only improvements installed on or in connection with your home located in the United States that was originally placed in service by you qualify.