An attic in which a fau is installed shall be accessible by an opening and passageway 30 x 30 in size.
Attic forced air unit dimensions.
20 inches 508 mm by 30 inches 762 mm minimum.
Attic furnace appliance clear access opening dimensions are.
Ac unit size calculator accurately estimates the size of the central air conditioner unit you should install in your house.
Attic furnace passageway minimum dimensions requirements.
Of forced air unit and vent.
Well mainly it s a way to save space.
Attic hvac systems save space.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
So why put an hvac system up in the attic at all.
Attic access may be reduced to 22 x 30 provided the largest piece of equipment can be removed.
The rough framed opening must be a minimum of 22 inches by 30 inches.
But it must be large enough to permit removal of the largest appliance installed in the attic area.
30 inches high 762 mm 22 inches wide 559 mm 20 feet max length 6096 mm.
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.
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.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.