Furnace In Unconditioned Attic

An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.

Furnace in unconditioned attic.

Because the furnace is installed in the attic so are air ducts which deliver air to your rooms. Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts. The 1 800 square foot brick ranch in climate zone 4 dates from the 1960s but the previous owner installed both a furnace and ductwork in the attic just four years ago. Installing a 95 gas fired furnace in an unconditioned attic.

Efficiency losses in unconditioned spaces outweigh gains. So why put an hvac system up in the attic at all. That means having it placed in the attic or a crawl space is a bad idea because you are increasing the risk of causing. That moisture can freeze if it receives exposure to exceptionally cold temperatures.

Well mainly it s a way to save space. Heated air flowing through those ducts will lose heat when the unconditioned attic is cold forcing the furnace to run longer. 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. Ted also has inherited a powered attic ventilator.

Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space. According to the u s department of energy the furnace s energy efficiency can drop by 35 when installed in an unconditioned space like the attic. 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. This drain removes the excess water that a heating system will generate.

A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic. High efficiency furnaces aren t usually recommended for an attic. Most homeowners should not place a condensing furnace in an unconditioned space because the unit will produce water as it heats the air. Attic hvac systems save space.

06 15 2007 09 55 am 1. The drain must be installed through the core of the house as water will be flowing during the colder months.