What is the mechanical code rule regarding the minimum outside air intake distance from a plumbing vent?
4th YearCode & ComplianceRED · Stop / Verify
Per the International Mechanical Code (IMC Section 401), the open intake louvers of any mechanical outside air system must be located a minimum of 10 feet away horizontally from any plumbing vent stack termination, chimney, or gas appliance exhaust vent. Alternatively, the intake must sit at least 3 feet below the level of that exhaust point if they are located closer together.