Installing High Efficiency Gas Furnace In Attic

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

Installing high efficiency gas furnace in attic.

The furnace is a 58mvb120 120 high efficiency unit. Hello everyone i recently had a new hvac system installed in my attic. High efficiency furnaces may be installed in basements ground floor utility rooms garages or attics in open spaces or confined closets. High efficiency gas furnaces with sealed combustion chambers require such an arrangement when installed in a sealed attic.

Always read the furnace manual and check local building. 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. High efficiency furnaces aren t usually recommended for an attic. That means you have higher energy costs and less efficiency since you re blowing the air down instead of allowing it to rise naturally.

The drain must be installed through the core of the house as water will be flowing during the colder months. You re better off installing a 95 furnace with a concentric vent that both sucks in and air and expels exhaust. Installation guide for existing houses. Ashrae estimates the average life expectancy of a new gas furnace to be 15 years largely as a result.

But that s simply not an issue that we need to worry about in southern california where our winters are mild. With the attic sealed we couldn t smell the odorant and the gas could accumulate. Other aspects of high efficiency furnace venting. In an unvented environment the 95 furnace is a safer choice.

Building will have an impact on the furnace. There are several other important aspects of high efficiency furnace venting. It is a carrier heat pump system with a propane furnace backup. For example additional attic wall or crawlspace insulation.

This drain removes the excess water that a heating system will generate. 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. This high efficiency venting system must be installed when you install the new furnace. 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.

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. The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process.