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// CODE SNIPPET

R405.7.7 Installation Criteria for Homes Claiming the Heat Recovery Unit (HRU) Option

2017 FBC - Energy Conservation, 6th edition > 4 [RE] Residential Energy Efficiency > R405 Simulated Performance Alternative (Performance) > R405.7 Requirements Specific to Credit Options > R405.7.7 Installation Criteria for Homes Claiming the Heat Recovery Unit (HRU) Option
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The heat recovery unit option may be used for installation of a waste heat recovery unit (HRU) on either an air conditioner or a heat pump where the heat recovery unit has a minimum net useful heat exchange effect of 50 percent and meets the following criteria:

  1. The net useful heat exchange effect shall be demonstrated by either a Form 400D-2017 prominently displayed on the unit with test results clearly visible for inspection or by an ARDM-certified refrigerant desuperheater seal affixed to the unit.
  2. The net useful heat exchange effect shall have been determined by an independent laboratory testing to AHRI Standard 470.
  3. If more than one air-conditioning system is installed in a residence and only one HRU is installed, energy load shall be based on the gallon capacity of the water heater to which it is coupled and the total capacity of the water heaters in the residence. In such case, the HRU shall be attached to the system serving the daytime primary living areas (family room, living room, kitchen, dining room and adjacent bedrooms and bathrooms).

Related Code Sections


R405.7.7 [RE] Residential Energy Efficiency, Installation Criteria for Homes Claiming the Heat Recovery Unit (HRU) Option
The heat recovery unit option may be used for installation of a waste heat recovery unit (HRU) on either an air conditioner or a heat pump where ...
2017 FBC - Energy Conservation, 6th edition > 4 [RE] Residential Energy Efficiency > R405 Simulated Performance Alternative (Performance) > R405.7 Requirements Specific to Credit Options > R405.7.7 Installation Criteria for Homes Claiming the Heat Recovery Unit (HRU) Option
R405.7.7 [RE] Residential Energy Efficiency, Installation Criteria for Homes Claiming the Heat Recovery Unit (HRU) Option
The heat recovery unit option may be used for installation of a waste heat recovery unit (HRU) on either an air conditioner or a heat pump where ...
2020 FBC - Energy Conservation, 7th edition > 4 [RE] Residential Energy Efficiency > R405 Simulated Performance Alternative (Performance) > R405.7 Requirements Specific to Credit Options > R405.7.7 Installation Criteria for Homes Claiming the Heat Recovery Unit (HRU) Option
R405.7.7 [RE] Residential Energy Efficiency, Installation Criteria for Homes Claiming the Heat Recovery Unit (HRU) Option
The HRU option may be used for installation of a waste HRU on either an air conditioner or a heat pump where the HRU has a minimum net useful heat ...
2014 FBC - Energy Conservation, 5th edition > 4 [RE] Residential Energy Efficiency > R405 Simulated Performance Alternative (Performance) > R405.7 Requirements Specific to Credit Options > R405.7.7 Installation Criteria for Homes Claiming the Heat Recovery Unit (HRU) Option
R405.7.8 [RE] Residential Energy Efficiency, Installation Criteria for Homes Claiming the Dedicated Heat Pump Option
The dedicated heat pump option may be used for a dedicated heat pump (also known as a heat pump water heater) installed either with a tank ...
2020 FBC - Energy Conservation, 7th edition > 4 [RE] Residential Energy Efficiency > R405 Simulated Performance Alternative (Performance) > R405.7 Requirements Specific to Credit Options > R405.7.8 Installation Criteria for Homes Claiming the Dedicated Heat Pump Option
C407.5.2.4 [CE] Commercial Energy Efficiency, Requirements Specific to Credit Options
Credit may be claimed in the compliance calculation for technologies that meet the criteria for various options specified below ...
2017 FBC - Energy Conservation, 6th edition > 4 [CE] Commercial Energy Efficiency > C407 Total Building Performance > C407.5 Calculation Procedure > C407.5.2 Thermal Blocks > C407.5.2.4 Requirements Specific to Credit Options
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