When a furnace is in a room that has less than 50 cubic feet of air for every cubic foot of gas 1 000 btu hr vents are needed in the room.
Enclosing furnace in attic.
This is how my own home is set up.
The biggest advantage of having an attic furnace is that it s a space saver.
As a result their designated space for a furnace is often no longer a.
This drain removes the excess water that a heating system will generate.
This is one reason building codes today require gas hwhs in garages to be in separate enclosures with combustion air supplied from outside the garage the attic above the garage is acceptable.
Typically the water heater is located in the closet also.
You ll also free up a closet.
30 inches high 762 mm 22 inches wide 559 mm 20 feet max length 6096 mm measured along the center line between the attic access opening and the attic furnace.
The door to the enclosure also has to be gasketed and the hwh must be some minimum distance above the floor of the garage.
However not every home has a pre existing designated space for a system.
Attic furnace passageway minimum dimensions requirements.
So what makes a furnace enclosed.
There s usually nothing up in an attic aside from some stored items so a furnace won t take up useful space.
Stated another way 1 cubic foot of air is needed for.
Ductwork goes through open ceiling into the attic then into the house.
Elevate an enclosure in a basement or garage.
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.
Furnaces in closets attached to the garage is the rule in our area.
Older or historic homes for instance often featured much smaller heating systems than the modern ones we install today.
Where the furnace is enclosed louvered openings in the room should be provided to ensure there is adequate air.
In homes with limited space the furnace can be installed in the attic.
Use concrete blocks or a concrete pad to set the base of the furnace at least 4 inches above the floor to prevent any water from reaching it.