FF_Q19_HeatingSystem Version 7.1.1

PHOTO REQUIRED of Heating System nameplate/model number and controls per MINHERS Chapter 9. Raters/RFIs are responsible for documenting reasons for missing photos. Rater/RFI verifies and documents the correct space heating system(s) types, fuel types, locations and number of units. Rater/RFI verifies and documents the correct output capacities, efficiencies, heating auxiliary electric use (EAE) [if relevant], heat pump fan power and heat pump energy as shown on AHRI certificates or OEM data.

• Air Handlers are part of the duct system. Make sure air handler locations are captured.
• Heating fuels should correspond with the fuels/rates defined for the building as a whole.
• Photographs of installed air handlers, boilers, coils, ductless heads, and outside units will capture type and location.
• Photographs of meters and tanks can capture fuels used in the home.
• For split refrigerant systems, capacity is a function of both the inside and outside coil(s). AHRI requires both model numbers to define equipment efficiency and capacity.
• If both coils are from the same manufacturer, OEM matching tables usually provide the values.
• For non-split systems, nameplate photographs typically have full specifications listed.
• Ground source heat pumps will have different efficiencies depending on whether they’re closed-loop (brine) systems or open-loop (water source) systems. OEM charts usually list all options.
• GSHP pump energy: electrical consumption by the pumps can have a notable impact on system efficiency. Water source heat pumps (open-loop) typically use higher wattage pumps than those used for closed-loop heat pumps. Variable speed pumps may have varying wattage. Refer to manufacturer’s specs to determine wattage based on flow settings.
• GSHP Wells: Rater/RFI verifies and documents the correct well type, number of wells, well depth and loop flow.

SCORING:

• Satisfactory: No errors in heating system verification
• 1: one to two minor errors (listed below) in heating verification (this is per system)
• 2: NO PHOTO OR three to four minor errors (listed below) in heating verification OR one to two major errors in heating verification (this is per system)
• 3: Incorrect number of units OR five or more minor errors (listed below) in heating verification OR three or more major errors in heating verification (this is per system)

Minor Heating Verification Errors:

• AFUE or HSPF/HSPF2 value off by 1% to 2% from AHRI Certificate, supporting documentation, or conversion calculation. COP value off by 5% to 10% from AHRI Certificate or supporting docs.
• Output capacity off by 2 kBtu/h to 5 kBtu/h from AHRI Certificate or supporting docs
• If relevant, verified EAE off by 10 kWh to 25 kWh from AHRI Certificate or supporting docs
• Incorrect fan motor type
• % Heating Load Served off by 2% to 5%
• Incorrect location identified for Heating System

Major Heating Verification Errors:

• Incorrect equipment type identified
• Incorrect fuel type identified
• HSPF/HSPF2 off by greater than 2% from AHRI certificate, supporting documentation, or conversion calculation
• HSPF2 not properly converted to HSPF or the improper HSPF/HSPF2 is documented
• HSPF value from supporting documentation is documented as HSPF2 value.
• AFUE value off by greater than 2% from AHRI Certificate or supporting docs.
• COP value off by greater than 10% from AHRI Certificate or supporting docs.
• Output capacity off by greater than 5 kBtu/h from AHRI Certificate or supporting docs
• If relevant, verified EAE off by greater than 25 kWh from AHRI Certificate or supporting docs
• % Heating Load Served off by greater than 5%