Installing High Efficiency Gas Furnace In Attic

Building will have an impact on the furnace.

Installing high efficiency gas furnace in 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. But that s simply not an issue that we need to worry about in southern california where our winters are mild. 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. Other aspects of high efficiency furnace venting.

High efficiency furnaces aren t usually recommended for an attic. The furnace is a 58mvb120 120 high efficiency unit. This high efficiency venting system must be installed when you install the new furnace. Ashrae estimates the average life expectancy of a new gas furnace to be 15 years largely as a result.

Installation guide for existing houses. You re better off installing a 95 furnace with a concentric vent that both sucks in and air and expels exhaust. 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. This drain removes the excess water that a heating system will generate.

The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process. For example additional attic wall or crawlspace insulation. That means you have higher energy costs and less efficiency since you re blowing the air down instead of allowing it to rise naturally. Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.

But if your furnace is in a sealed attic or encapsulated crawl space open combustion does have the potential to cause problems. 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. With the attic sealed we couldn t smell the odorant and the gas could accumulate. However one contractor cited the danger of leaking gas being trapped in the attic and causing a fire or explosion.

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. Always read the furnace manual and check local building. 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. Hello everyone i recently had a new hvac system installed in my attic.