Attic Furnace Detail

Cmc section 304 4 appliances in attics.

Attic furnace detail.

B 30x30 inch minimum unobstructed passage to remove equipment but not less than the largest equipment maximum 20 distance from access to unit. If the attic and roof framing is a pre fabricated engineered truss system an engineering report wet stamped and signed by a licensed engineer shall be submitted for review and approval prior to issuance of a building permit. Well mainly it s a way to save space. So why put an hvac system up in the attic at all.

Fau unit shall be doubled with a minimum 2x6 joists. Sediment trap cpc 1212 8. Obtain the furnace manufacturers installation instructions and install the furnace to their specifications. How to install insulating sheathing over the roof deck with a cathedral ceiling.

Establish the best location for installation of forced air unit and vent. The following are attic furnace installation requirements based on 2009 irc and 2009 imc the codes refer to it as appliances in attics. Central attic furnace detail 410 8 kb concrete block pilaster method m 310 8 kb concrete block pilaster method n 299 5 kb exterior door landing details 424 1 kb pool barrier sample detail 207 1 kb sample site plan 117 3 kb standard plan for detached garage 68 6 kb. Attic furnace access passageway and platform attic furnace passageway and.

Refer to the current state and local building codes for the minimum r value of air impermeable insulation required for the roof assemblies in your climate. Attic furnace walkway platform attic furnace installation must comply with you local mechanical code or imc international mechanical code if such was adopted in your area. Additionally if the attic and roof is conventionally framed ceiling joist under the location of the fau unit shall be doubled with a minimum 2x6 joists. Attic hvac systems save space.

An attic in which a fau is installed shall be accessible by an opening and passageway 30 x 30 in size. This handout is intended to provide only general information for further information contact the building safety division. Unvented cathedralized attic detail with air impermeable insulating sheathing installed over the roof deck. Fau located in an attic attic access service space c m c 904 crc r807 ventilation.

An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan. Attic access may be reduced to 22 x 30 provided the. Cmc chapter 9 attic furnace diagram. Located in an attic cmc 304 4 furnaces located in an attic area shall comply with the diagram at the bottom of this page.