Substitute the following wording for the requirements in IFGC section 621: Portable or permanently installed, gas-fired, unvented heating appliances may not be installed, except during construction or demolition of a building if the appliances are provided in accordance with ch. SPS 314.
Wis. Admin. Code Department of Safety and Professional Services SPS 365.0621
See s. SPS 364.0801(2) for use of portable unvented heating appliances that are fired with other fuels.