Furnace In Unconditioned Attic

Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.

Furnace in unconditioned attic.

Most homeowners should not place a condensing furnace in an unconditioned space because the unit will produce water as it heats the air. An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan. Ted has more than a few cobwebs in his attic. Installing a 95 gas fired furnace in an unconditioned attic.

That moisture can freeze if it receives exposure to exceptionally cold temperatures. Attic hvac systems save space. Heated air flowing through those ducts will lose heat when the unconditioned attic is cold forcing the furnace to run longer. So why put an hvac system up in the attic at all.

06 15 2007 09 55 am 1. Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space. Because the furnace is installed in the attic so are air ducts which deliver air to your rooms. The unconditioned space also houses his hvac system.

A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic. Efficiency losses in unconditioned spaces outweigh gains. High efficiency furnaces aren t usually recommended for an attic. Ted also has inherited a powered attic ventilator.

With all that said you can generally count on attic placement being a bad idea in part because high efficiency furnaces which dominate the market today just can t function in attic space usually due to both the volume of air necessary for operation and because of safety considerations. The drain must be installed through the core of the house as water will be flowing during the colder months. This drain removes the excess water that a heating system will generate. 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.

View profile view forum posts view forum threads professional member join date jun 2006 posts 36 post likes installing a 95 gas fired furnace in an unconditioned attic. Well mainly it s a way to save space.