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// CODE SNIPPET

R403.5.9 Connection to Forced Air Circulation Systems

Minnesota Energy Code 2015 > 4 [RE] Residential Energy Efficiency > R403 Systems > R403.5 Mechanical Ventilation (Mandatory) > R403.5.9 Connection to Forced Air Circulation Systems
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When air ducts are directly connected to the forced air circulation system, the outdoor air shall be supplied directly to the forced air circulation system, or the exhaust air shall be drawn directly from the forced air circulation system, but not both. To meet the mechanical ventilation system requirements, the air duct shall be installed according to the manufacturer's installation instructions.
Exception: Both outdoor air and exhaust air may be connected to the forced air circulation system only if controls are installed to operate the forced air circulation system when the mechanical ventilation system is operating or other means are provided to prevent short circuiting of ventilation air in accordance with the manufacturer's recommendations.

Related Code Sections


R403.5.9 [RE] Residential Energy Efficiency, Connection to Forced Air Circulation Systems
When air ducts are directly connected to the forced air circulation system, the outdoor air shall be supplied directly to the forced air circulation ...
Minnesota Energy Code 2015 > 4 [RE] Residential Energy Efficiency > R403 Systems > R403.5 Mechanical Ventilation (Mandatory) > R403.5.9 Connection to Forced Air Circulation Systems
Section 618 Specific Appliances, (IFGC) Forced-Air Warm-Air Furnaces
Outdoor or return air for forced-air heating and cooling systems shall not be taken from the following ...
2020 Minnesota Fuel Gas Code > 6 Specific Appliances > 618 (IFGC) Forced-Air Warm-Air Furnaces
Section 627 Specific Appliances, (IFGC) Air-Conditioning Appliances
A refrigeration coil shall not be installed in conjunction with a forced-air furnace where circulation of cooled air is provided ...
Minnesota Fuel Gas Code 2015 > 6 Specific Appliances > 627 (IFGC) Air-Conditioning Appliances
Section 627 Specific Appliances, (IFGC) Air-Conditioning Appliances
A refrigeration coil shall not be installed in conjunction with a forced-air furnace where circulation of cooled air ...
2020 Minnesota Fuel Gas Code > 6 Specific Appliances > 627 (IFGC) Air-Conditioning Appliances
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