{"data":{"id":"us-nyc/n.y.c.-admin.-code-mc-605","jurisdiction":"us-nyc","citation":"N.Y.C. Admin. Code § MC 605","heading":"Section MC 605: Air Filters","body":"605.1 General.\n\nHeating and air-conditioning systems shall be provided with approved air filters. Filters shall be installed such that all return air, outdoor air and makeup air is filtered upstream from any heat exchanger or coil. Filters shall be installed in an accessible location. Liquid adhesive coatings used on filters shall have a flash point not lower than 325°F (162.8°C).\n\n605.2 Standards.\n\nMedia-type and electrostatic-type air filters shall be listed and labeled. Media-type air filters shall comply with UL 900. High efficiency particulate air filters shall comply with UL 586. Electrostatic-type air filters shall comply with UL 867. Air filters utilized within dwelling units shall be designed for the intended application and shall not be required to be listed and labeled.\n\n605.2.1 Standards for air-handling units.\n\nAir-handling units of mechanical ventilation systems, any portion of which provide outdoor air ventilation, shall be equipped with a particulate matter filtration system in accordance with ASHRAE 62.1 or ASHRAE 62.2 and shall have a minimum efficiency reporting value (MERV) of 11 or greater in accordance with ASHRAE 52.2.\n\nExceptions:\n\n1. This section shall not apply to the alteration or repair of a mechanical ventilation system that was installed prior to January 1, 2013 unless such alteration or repair includes the replacement or addition of an air-handling unit in such system.\n\n2. This section shall not apply to any air-handling unit with a design capacity of less than 5,000 cfm (2.4 m\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t3\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t/s).\n\n3. This section shall not apply for combustion outside air, dilution air, ventilation air for mechanical room and spaces not intended for occupancy.\n\n605.3 Airflow over the filter.\n\nDucts shall be constructed to allow an even distribution of air over the entire filter.\n\n605.4 Liquid adhesive tanks.\n\nTanks for liquid adhesives, into which removable filters are dipped, shall be prohibited.\n\n605.5 Filter maintenance.\n\nAll air filters shall be kept free of excess dust and combustible material. Unit filters shall be renewed or cleaned when the resistance to airflow has increased to two times the original resistance or when the resistance has reached a value of recommended replacement by the manufacturer. A permanently installed draft gauge or differential pressure transmitter shall be provided for all systems equal to or greater than 4000 cfm (1.89 m\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t3\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t/s).","path":["New York City Administrative Code","Title 28","Chapter 8: New York City Mechanical Code"],"source_url":"https://files.amlegal.com/pdffiles/NewYorkCity/Admin/XML.zip","current_through":"Local Law 2026/135 (enacted August 31, 2026)","vintage":"","retrieved_at":"2026-09-06T02:48:57Z","sha256":"c96086dfd1bedfbffc21a7a653b8434fedd104f1a338b41989be324b57bc412e","source_id":"us-nyc","stale":false,"prev":"us-nyc/n.y.c.-admin.-code-mc-604","next":"us-nyc/n.y.c.-admin.-code-mc-606"},"notice":"GroundRules: Original legal text. Not legal advice."}