Energy Savings Plus Health | INDOOR AIR QUALITY GUIDELINES FOR MULTIFAMILY BUILDING UPGRADES 39
PRIORITY ISSUE 12.0 UNVENTED COMBUSTION APPLIANCES (continued)
ASSESSMENT
PROTOCOLS (AP)
MINIMUM ACTIONS (MA)
EXPANDED
ACTIONS (EA)
• Suggest occupants replace gas-fired unvented space heaters not
listed to ANSI Z21.11.2 with a vented appliance or, at a minimum,
consider upgrading the heater to a new model consistent with ANSI
Z21.11.2.
• Inform occupants if any unvented combustion space heaters or vent-
free gas fireplaces appear to be oversized for their application.
Note:
The proper size of a space heater depends on a room's dimensions and
its heat loss characteristics. A 5,000 BTU/hour space heater often can
be a suitable size for a room with a floor area of 150 square feet.
MA 12.3 Advise Occupants on Proper Operation and Maintenance
Advise occupants to always consult and follow the manufacturer's
printed instructions for proper operation and maintenance. If the
manufacturer's instructions are not available, advise or assist occupants
in obtaining replacement instructions.
Note:
The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) can
be a source of information to obtain manufacturers' instructions for
unvented combustion appliances.
Advise occupants that unvented space heaters should not be used in
a manner that influences the thermostat controlling the primary heat
source, thereby causing the space heater to operate in place of the
primary heat source.
MA 12.4 Ensure CO Detection and Warning Equipment is Installed
Ensure CO detection and warning equipment is installed and
located according to NFPA 720 and any applicable local or state
requirements.
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References for Priority Issue 12.0 Unvented Combustion Appliances:
AHRI
ANSI Z21.11.2-2013: Gas-Fired Room Heaters, Volume II, Unvented Room Heaters
ASHRAE Standard 62.2-2013: Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings
CPSC: Carbon Monoxide Questions and Answers
DOE: Standard Work Specifications for Multi-Family Home Energy Upgrades, Section 2.0202.1, Unvented Space Heaters
EPA: Carbon Monoxide's Impact on Indoor Air Quality
NFPA 720: Standard for the Installation of Carbon Monoxide (CO) Detection and Warning Equipment
Appendix B: Property Management and Occupant Education
