HEATING EQUIPMENT BOILERS
General Requirements: Only natural gas equipment is eligible for incentives. Boilers fueled by electric, propane, or oil are NOT eligible for incentives. Redundant or backup boilers do not qualify. Condensing boilers (≥ 90% AFUE or thermal efficiency) will provide maximum efficiency only if the return water temperature is cool enough to condense flue gases. If the heating system configuration cannot provide necessary operating conditions to the boiler, selection of a non- condensing or near-condensing boiler may be more appropriate. HOT WATER BOILERS Common Area Requirements: • Boiler incentives are only available for equipment used in space heating applications. Boilers used for only domestic hot water heating are not eligible for this incentive but may qualify for a custom incentive. • Must be a central plant type arrangement that serves multiple dwelling units in the multifamily building. • Space heating boilers also used for DHW may be eligible for indirect DHW incentives but are subject to requirements. • A boiler replacing a space heating and indirect DHW system will use the capacity of the existing space heating and DHW systems to estimate the split of incentives. • Boiler efficiency will be verified using the AHRI database (see ahridirectory.org). If the boiler is not listed in the AHRI database, provide a boiler specification sheet with boiler input and output ratings and either AFUE or thermal efficiency as appropriate for boiler size. • Steam boilers do not meet efficiency requirements and are not eligible for this incentive but may qualify for a custom incentive. Hot water boiler ≥ 90% thermal efficiency replacing a steam boiler is eligible. • ≥ 90% thermal efficiency boilers: • If the heating system configuration is such that the boiler needs to operate at a high hot water temperature, which prevents the flue gases from condensing (as described above in the General Requirements), then the boiler is not eligible for H2218 or H3276. • Hot water boilers < 300 MBh: • Must be a sealed combustion unit and ≥ 90% AFUE. • Condensing boilers must modulate their firing rate and include outdoor-air reset control. • Hot water boilers ≥ 300 MBh:
• Boilers must be capable of capacity modulation. • Do not round AHRI capacity to a whole number.
• Condensing boilers (≥ 90% thermal efficiency) will provide maximum efficiency only if the return water temperature is cool enough to condense flue gases. If the heating system configuration cannot provide necessary operating conditions to the boiler, selection of a non-condensing or near condensing boiler may be more appropriate.
COMMON AREA EQUIPMENT UPGRADES AND RETROFITS Measure Description
Code
Incentive
Unit
Hot Water Boilers < 300 MBh input, ≥ 90% AFUE
H2218
Midstream
Boiler
Hot Water Boilers ≥ 300 MBh input, ≥ 90% Thermal Efficiency
H3276
$5.00
MBh
CUSTOM PROJECT IDEA? Talk to your Energy Advisor about custom
incentives not listed in this catalog that may be available for reducing energy waste in your building.
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