DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Page 71

H

Heating, Ventilation, and Air Conditioning

H2.

SEALED COMBUSTION UNITS

CRITERIA FOR QUALIFICATION Up to three points are available for furnaces or water heaters that are any one of the following: ? True sealed combustion unit: Sealed combustion equipment draws its combustion air directly from outside the home and exhausts its combustion products directly out of the home. The air intakes and exhaust are sealed off from the inside of the home, which greatly reduces the chance for any spillage of combustion products into the home. Power vented units (such as fan driven exhaust vents) in attached garages, vented attics, vented crawlspaces, exterior recessed boxes, or exterior closets with manufacturer specified outside air vents . Passive atmospherically vented or natural draft units outside the building (for example, in a carport). This type of equipment in the attic, garage, or crawlspace does not meet this measure. Gas furnaces or water heaters on the roof or on the outside of an exterior wall and outside the building envelope. Electric appliances, such as electric tank(less) water heaters or heat pumps (for either space heating or water heating). Other electric space heating appliances.

? ? ? ? ?

Note: This measure is a requirement associated with measure Error! Reference source not found., “Error! Reference source not found.,” on page Error! Bookmark not defined.. Points will be allocated as follows: H2.1. H2.2. Sealed Combustion Furnace (1 Point) Sealed Combustion Water Heater (2 Points)

VERIFICATION Field Verification: The Rater will conduct field compliance verification and take photos showing sealed combustion unit(s). INTENT To improve indoor health and safety by eliminating the use of indoor air for combustion. To eliminate the potential for backdrafting.

H3.

DESIGN AND INSTALL HVAC SYSTEM TO ACCA MANUAL J, D, AND S RECOMMENDATIONS

CRITERIA FOR QUALIFICATION Four points of credit are available for designing and installing the HVAC system according to results obtained from ACCA Manual J (the home’s heat load calculation), Manual D (ductwork, design, and sizing), and Manual S (equipment selection and sizing). This is an engineered system. This measure applies only to a whole system replacement.

GreenPoint Rated Existing Home Rating Manual Version 6.0, September 2013 © Build It Green

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