You might not receive the same air movement benefits if the unit is in a garage either.
Furnace in attic safe.
Just installing the furnace in the attic crawl way of a single story home gives protection from most flooding.
If it s less than 90 percent it will be less efficient.
One point about a 90 in the attic in a cold climate is if the proper steps are not taken you can freeze a condensate line up there.
A home s furnace is commonly located in a secluded area from a closet to a basement.
The biggest advantage of having an attic furnace is that it s a space saver.
If the closet is next to one of the bathrooms as it often is this gives you a nice remodeling opportunity.
Typically the fresh air intake will be located in your attic or ducted to the return side of the home s central air handler.
Keep bathroom fans and window units turned off.
There s usually nothing up in an attic aside from some stored items so a furnace won t take up useful space.
In flood prone areas instaling a furnace in the attic provides protection.
Furnaces installed in attics can be vulnerable to breakdowns since they can be largely forgotten when not in.
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.
A furnace in the attic is a design that works for all homes.
That puts a real drag on the efficiency of your unit whether it s an air conditioner or a furnace.
Attics are often ventilated to the outdoors and are not typically part of the air conditioned space in the home.
If you don t have a crawl space or a basement then it can be a challenge to place a furnace on the ground floor of the structure.
This drain removes the excess water that a heating system will generate.
Keep a 90 percent furnace out of an attic if you have cold temperatures.
Even when furnaces are put on the main floor floodwaters often overrun the first floor causing severe damage to the unit.
It s just as safe for it to be in the attic as it is in the basement.
As a result any air leaks here mean the air goes outdoors.
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.