Attic Furnace Requirements

Attic hvac systems save space.

Attic furnace requirements.

The total drop in efficiency can be up to 35. It will not require long lengths of pipe to deliver heat to the rooms as a basement furnace does. The passage must not be smaller than 30 high x 22 wide and no longer than 20 unless it s at least 6 tall and then no more than 50 passageways must have a solid floor no less than 24 wide. Attic furnace passageway minimum dimensions requirements.

30 inches high 762 mm 22 inches wide 559 mm 20 feet max length 6096 mm. The opening passageway must allow for unobstructed access. An attic furnace is closer to the upper stories of a multi level home. An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.

So why put an hvac system up in the attic at all. Well mainly it s a way to save space. Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts. If you place the furnace in the attic then you must install the infrastructure in the building to force the warm air to the bottom floor.

That means you have higher energy costs and less efficiency since you re blowing the air down instead of allowing it to rise naturally.