Installing High Efficiency Gas Furnace In Attic

Other aspects of high efficiency furnace venting.

Installing high efficiency gas furnace in attic.

The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process. Installation guide for existing houses. I had a new high efficiency furnace installed in my unheated attic and had the same problem of the furnace not running because the condensate trap had ice in it. After the installation was done i found out that these high efficiency furnaces are not recommended in the attic because the condensate trap can freeze.

For example additional attic wall or crawlspace insulation. With the attic sealed we couldn t smell the odorant and the gas could accumulate. This high efficiency venting system must be installed when you install the new furnace. The drain must be installed through the core of the house as water will be flowing during the colder months.

It is a carrier heat pump system with a propane furnace backup. But if your furnace is in a sealed attic or encapsulated crawl space open combustion does have the potential to cause problems. There are several other important aspects of high efficiency furnace venting. But that s simply not an issue that we need to worry about in southern california where our winters are mild.

This drain removes the excess water that a heating system will generate. Ashrae estimates the average life expectancy of a new gas furnace to be 15 years largely as a result. In an unvented environment the 95 furnace is a safer choice. Building will have an impact on the furnace.

Hello everyone i recently had a new hvac system installed in my attic. High efficiency gas furnaces with sealed combustion chambers require such an arrangement when installed in a sealed attic. 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. Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.

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. You re better off installing a 95 furnace with a concentric vent that both sucks in and air and expels exhaust. The furnace is a 58mvb120 120 high efficiency unit. High efficiency furnaces may be installed in basements ground floor utility rooms garages or attics in open spaces or confined closets.

However one contractor cited the danger of leaking gas being trapped in the attic and causing a fire or explosion. Always read the furnace manual and check local building.