Installing High Efficiency Gas Furnace In 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.

Installing high efficiency gas furnace in attic.

It is a carrier heat pump system with a propane furnace backup. This drain removes the excess water that a heating system will generate. Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space. High efficiency gas furnaces with sealed combustion chambers require such an arrangement when installed in a sealed attic.

Installation guide for existing houses. High efficiency furnaces may be installed in basements ground floor utility rooms garages or attics in open spaces or confined closets. Always read the furnace manual and check local building. 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.

But if your furnace is in a sealed attic or encapsulated crawl space open combustion does have the potential to cause problems. Other aspects of high efficiency furnace venting. That means you have higher energy costs and less efficiency since you re blowing the air down instead of allowing it to rise naturally. You re better off installing a 95 furnace with a concentric vent that both sucks in and air and expels exhaust.

The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process. Building will have an impact on the furnace. In an unvented environment the 95 furnace is a safer choice. Ashrae estimates the average life expectancy of a new gas furnace to be 15 years largely as a result.

However one contractor cited the danger of leaking gas being trapped in the attic and causing a fire or explosion. High efficiency furnaces aren t usually recommended for an attic. 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. There are several other important aspects of high efficiency furnace venting.

The furnace is a 58mvb120 120 high efficiency unit. Hello everyone i recently had a new hvac system installed in my attic. The drain must be installed through the core of the house as water will be flowing during the colder months. I didn t get much help from the gc or the hvac contractor he hired so i installed a clamp lamp with a 60 watt bulb to shine on the trap.

For example additional attic wall or crawlspace insulation. This high efficiency venting system must be installed when you install the new furnace.