Does anyone know of a company that make a gas fired duct furnace between 125- 150 mbh input, that is now more wide then 21"? We need to replace a modine duct furnace that was installed in the building before the roof was installed. Now the heat exchanger is cracked, and the heater needs to be replaced. The only way to get the new heater in the attic is through the access hole which 41"x21"
Thanks to all
Thanks to all