NaBoom 2 Germany
Oct 12, 2021 · If your ceiling is over 8 feet tall, multiply base BTU by or 25%. For example: 37,500 x = 49750 total units of air conditioners needed (1 ton). Your furnace will need 12000/efficiency as a decimal rounded down – so if efficiency was .9, it would be 10400 that needs to be replaced every year!