1364.306.1 Heat Supply. Every owner and operator of any building who rents, leases or lets one or more dwelling units or sleeping units on terms, either expressed or implied, to furnish heat to the occupants thereof shall supply heat during the period from October 1 to May 1 to maintain a temperature of not less than 68°F in all habitable rooms, bathrooms, and toilet rooms.
Exception: When the outdoor temperature is below the winter outdoor design temperature for the locality, maintenance of the minimum room temperature shall not be required provided that the heating system is operating at its full design capacity. The winter outdoor design temperature for the locality shall be as indicated in the Ohio Building Code or Residential Code of Ohio as applicable.
Exception: Fuel-burning equipment and appliances which are labeled for unvented operation.
1364.306.8 Energy Conservation Devices. Devices intended to reduce fuel consumption by attachment to a fuel-burning appliance, to the fuel supply line thereto, or to the vent outlet or vent piping there from, shall not be installed unless labeled for such purpose and the installation is specifically approved.