Unit Heaters

The Multi-State Appliance Standards Collaborative included state standards for unit heaters, until the state standards were preempted by an equivalently strong Federal Standard, effective August 8, 2008.

Please note: California still requires certification for products subject to federal standards. Please see Manufacturer Product Certification for more information on how to certify products.


The term ‘unit heater’ means a self-contained fan type heater designed to be installed within the heated space.  The term ‘unit heater’ does not include a warm air furnace.

Federal Standard

A unit heater manufactured on or after the date that is 3 years after the date of enactment of this subsection shall—

  • (1) be equipped with an intermittent ignition device; and
  • (2) have power venting or an automatic flue damper.

Source: Energy Policy Act 2005, 109th  Cong. § 135(c)(4) (2005).  www.epa.gov/oust/fedlaws/publ_109-058.pdf

The Multi-State Collaborative is providing these standard summaries as a courtesy; these materials are not intended to interpret state regulations. The user is responsible for reading and interpreting the regulations.