20 inches 508 mm by 30 inches 762 mm minimum.
Attic forced air unit dimensions.
30 inches high 762 mm 22 inches wide 559 mm 20 feet max length 6096 mm.
So why put an hvac system up in the attic at all.
In most cases you can use the conversion information below to help in determining the size of your existing air conditioner system use the system model number not the serial number 18 1 5 tons 24 2 tons 30 2 5 tons 36 3 tons 42 3 5 tons 48 4 tons.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
Attic access may be reduced to 22 x 30 provided the largest piece of equipment can be removed.
The system capacity is almost always coded into the model number of the outdoor unit.
Attic furnace passageway minimum dimensions requirements.
Attic hvac systems save space.
Building codes according to the 2006 international residential code r807 1 attic access homes with combustible materials in the ceiling and roof construction must have an access to attic areas that exceeds 30 square feet and with a vertical height of 30 inches or greater.
Attic furnace appliance clear access opening dimensions are.
The rough framed opening must be a minimum of 22 inches by 30 inches.
An attic in which a fau is installed shall be accessible by an opening and passageway 30 x 30 in size.
But it must be large enough to permit removal of the largest appliance installed in the attic area.
Of forced air unit and vent.
Well mainly it s a way to save space.
Ac unit size calculator accurately estimates the size of the central air conditioner unit you should install in your house.