How To Install A Gas Furnace In An Attic

Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.

How to install a gas furnace in an attic. Modern gas furnaces are electronic ignition and when the flame isn t burning there is no pilot light gas being used etc. Didn t give it a second thought to tie the furnace drain with the a c evap drain and added heat tape as per mfg specs. Attic furnace passageway and service area electrical requirement. The total drop in efficiency can be up to 35.

Attic furnace installation must comply with you local mechanical code or imc international mechanical code if such was adopted in your area. Attic furnace access passageway and platform. High efficiency furnaces aren t usually recommended for an attic. In flood prone areas instaling a furnace in the attic provides protection.

A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic. 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. The combustion chamber will also be vented to the exterior so not much chance of a carbon monoxide problem either. The drain must be installed through the core of the house as water will be flowing during the colder months.

The trick to the installation of a gas furnace in an attic space is routing the condensate drain from the attic down through the core of the house to the basement. That means you have higher energy costs and less efficiency since you re blowing the air down instead of allowing it to rise naturally. Worked great till we had a good freeze. Just installing the furnace in the attic crawl way of a single story home gives protection from most flooding.

This drain removes the excess water that a heating system will generate. I remember when the 90 furnaces first came out i sold one to replace a horiz 80 in the attic which had an ac evap coil connected to it.