Current through 2024-38, September 18, 2024
A.
Comfort
cooling systems
When not provided and installed by the home manufacturer,
any comfort cooling systems that are installed must be installed according to
the appliance manufacturer's installation instructions.
1.
Air conditioners
Air conditioning equipment must be listed or certified by
a nationally recognized testing agency for the application for which the unit
is intended and installed in accordance with the terms of its listing or
certification (see part 3280.714):
a.
Energy efficiency
(i)
Site-installed central air conditioning equipment must be sized to meet the
home's heat gain requirement in Chapter 28 of the 1997 ASHRAE Handbook
of Fundamentals (incorporated by reference) or ACCA Manual J,
Residential Cooling Load, 8th
edition (incorporated by reference).Information necessary to calculate the
home's heat gain can be found on the home's comfort cooling
certificate.
(ii) The BTU/hr. rated
capacity of the site-installed air conditioning equipment must not exceed the
air distribution system's rated BTU/hr. capacity as shown on the home's
compliance certificate.
b.
Circuit rating
If a manufactured home is factory provided with an exterior
outlet to energize heating and/or air conditioning equipment, the branch
circuit rating on the tag adjacent to this outlet must be equal to or greater
than the minimum circuit amperage identified on the equipment rating
plate.
c.
A-coil
units
(i) A-coil air conditioning
units must be compatible and listed for use with the furnace in the home and
installed in accordance with the appliance manufacturer's
instructions.
(ii) The air
conditioner manufacturer instructions must be followed.
(iii) All condensation must be directed
beyond the perimeter of the home by means specified by the equipment
manufacturer.
2.
Heat Pumps
Heat pumps must be listed or certified by a nationally
recognized testing agency for the application for which the unit is intended
and installed in accordance with the terms of its listing or certification (See
part 3280.714).
3.
Evaporative Coolers
a. A
roof-mounted cooler must be listed or certified by a nationally recognized
testing agency for the application for which the unit is intended and installed
in accordance with the terms of its listing (Seepart 3280.714):
(i) Any discharge grill must not be closer
than three feet from a smoke alarm.
(ii) Before field installing a roof mounted
evaporative cooler on-site, the installer must ensure that the roof will
support the weight of the cooler.
(iii) A rigid base must be provided to
distribute the cooler weight over multiple roof trusses to adequately support
the weight of the evaporative cooler.
b. An evaporative cooler that is not
roof-mounted is to be installed in accordance with the requirements of its
listing or the equipment manufacturer's instructions, whichever is the more
restrictive.
B.
Fireplaces and Wood-Stoves
When not provided by the home manufacturer, fireplaces and
wood-stoves including chimneys and air inlets for fireplaces and wood stoves
must be listed for use with manufactured homes and must be installed in
accordance with their listings.
C.
Appliance Venting
1. All fuel burning heat producing appliances
of the vented type except ranges and ovens must be vented to the exterior of
the home.
2. Upon completion, the
venting system must comply with all requirements of 3280.707(b) and 3280.710 of
the MHCSS.
3. When the vent
exhausts through the floor, the vent must not terminate under the home and must
extend to the home's exterior and through any skirting that may be
installed.
D.
Clothes Dryer Exhaust Duct System
A clothes dryer exhaust duct system must conform with and
be completed in accordance with the appliance manufacturer instructions and
part 3280.708.The vents must exhaust to the exterior of the home, beyond any
perimeter skirting installed around it, as shown in the Figure to Subchapter F,
Section III.
Figure to Subchapter F, Section III - Optional
Appliances: Dryer Exhaust System
Notes to Figure:
Click here to view
Image
1. Installation of
the exhaust system must be in accordance with the dryer manufacturer
instructions
2. Dryer exhaust
system must not contain reverse slope or terminate under the home.
