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// CODE SNIPPET

R403.5.5 Balanced and HRV/ERV Systems

Minnesota Energy Code 2015 > 4 [RE] Residential Energy Efficiency > R403 Systems > R403.5 Mechanical Ventilation (Mandatory) > R403.5.5 Balanced and HRV/ERV Systems
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All balanced systems shall be balanced so that the air intake is within 10 percent of the exhaust output. A heat recovery ventilator (HRV) or energy recovery ventilator (ERV) shall meet either:
  1. The requirements of HVI Standard 920, 72 hours minus 13°F (-l0°C) cold weather test; or
  2. Certified by a registered professional engineer and installed per manufacturer's installation instructions.
An HRV or ERV intended to comply with both the continuous and total ventilation rate requirements shall meet the rated design capacity of the continuous ventilation rate specified in Section R403.5.3 under low capacity and meet the total ventilation rate specified in Section R403.5.2 under high capacity.
Exception: The balanced system and HRV/ERV system may include exhaust fans to meet the intermittent ventilation rate. Surface mounted fans shall have a maximum 1.0 sone per HVI Standard 915.

Related Code Sections


R403.5.5 [RE] Residential Energy Efficiency, Balanced and HRV/ERV Systems
All balanced systems shall be balanced so that the air intake is within 10 percent of the exhaust output. A heat recovery ventilator (HRV) or energy ...
Minnesota Energy Code 2015 > 4 [RE] Residential Energy Efficiency > R403 Systems > R403.5 Mechanical Ventilation (Mandatory) > R403.5.5 Balanced and HRV/ERV Systems
N1103.6.1 [RE] Energy Efficiency, (R403.6.1) Whole-House Mechanical Ventilation System Fan Efficacy
AIR FLOW RATE MINIMUM (CFM) MINIMUM EFFICACY (CFM/WATT) AIR FLOW RATE MAXIMUM (CFM) HRV or ERV Any 1.2 cfm/watt Any Range hoods ...
2020 Minnesota Residential Code > 11 [RE] Energy Efficiency > N1103 (R403) Systems > N1103.6 (R403.6) Mechanical Ventilation (Mandatory) > N1103.6.1 (R403.6.1) Whole-House Mechanical Ventilation System Fan Efficacy
510.5.1 Exhaust Systems, Balancing
Systems conveying explosive or radioactive materials shall be prebalanced by duct sizing. Other systems shall be balanced by duct sizing ...
Minnesota Mechanical Code 2015 > 5 Exhaust Systems > 510 Hazardous Exhaust Systems > 510.5 Design > 510.5.1 Balancing
510.6.1 Exhaust Systems, Balancing
Systems conveying explosive or radioactive materials shall be prebalanced by duct sizing. Other systems shall be balanced by duct sizing ...
2020 Minnesota Mechanical Code > 5 Exhaust Systems > 510 Hazardous Exhaust Systems > 510.6 Design > 510.6.1 Balancing
309.2 General Regulations, Balancing
All mechanical ventilation and hydronic systems shall be capable of being balanced in accordance with this section ...
Minnesota Mechanical Code 2015 > 3 General Regulations > 309 Temperature Control > 309.2 Balancing
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