ATCP 73.145(3)(a)(a) Except as provided in par. (b) or in sub. (6), the operator shall install a carbon monoxide detector in each residential building in all of the following places not later than the date specified under par. (c): ATCP 73.145(3)(a)1.1. In the basement of the building if the basement has a fuel-burning appliance. ATCP 73.145(3)(a)2.2. Within 15 feet of each sleeping area of a unit that has a fuel-burning appliance. ATCP 73.145(3)(a)3.3. Within 15 feet of each sleeping area of a unit that is immediately adjacent to a unit, located on the same floor level, that has a fuel-burning appliance. ATCP 73.145(3)(a)4.4. In each room that has a fuel-burning appliance and that is not used as a sleeping area, not more than 75 feet from the fuel-burning appliance. ATCP 73.145(3)(a)5.5. In each hallway leading from a unit that has a fuel-burning appliance, in a location that is within 75 feet from the unit, measured from the door of the unit along the hallway leading from the unit, except that, if there is no electrical outlet within this distance, the operator shall place the carbon monoxide detector at the closest available electrical outlet in the hallway. ATCP 73.145(3)(b)(b) If a unit is not part of a multiunit building, the operator need not install more than one carbon monoxide detector in the unit. ATCP 73.145(3)(c)1.1. Except as provided under subd. 2., the operator shall comply with the requirements of this subsection before a residential building is occupied. ATCP 73.145(3)(c)2.2. The operator shall comply with the requirements of this subsection not later than April 1, 2010, if construction of the residential building was initiated before October 1, 2008, or if the department of safety and professional services approved the plans for the construction of the building under s. 101.12, Stats., before October 1, 2008. ATCP 73.145(3)(d)(d) A carbon monoxide detector shall conform to UL 2034 and shall be listed and labeled identifying conformance to UL 2034. Carbon monoxide detectors and sensors as part of a gas detection or emergency signaling system shall conform to UL 2075 and shall be listed and labeled identifying conformance to UL 2075. ATCP 73.145(3)(e)(e) The operator shall install every carbon monoxide detector required under this section according to the directions and specifications of the manufacturer of the carbon monoxide detector. ATCP 73.145(4)(4) Maintenance requirements. The operator shall maintain carbon monoxide detectors in compliance with the requirements of s. 101.149 (3), Stats., as follows: ATCP 73.145(4)(a)(a) The operator shall reasonably maintain every carbon monoxide detector in the residential building in the manner specified in the instructions for the carbon monoxide detector. ATCP 73.145(4)(b)(b) An occupant of a unit in a residential building may give the operator written notice that a carbon monoxide detector in the residential building is not functional or has been removed by a person other than the occupant. The operator shall repair or replace the nonfunctional or missing carbon monoxide detector within 5 days after receipt of the notice. ATCP 73.145(5)(5) Tampering prohibited. Pursuant to s. 101.149 (4), Stats., no person may tamper with, remove, destroy, disconnect, or remove batteries from an installed carbon monoxide detector, except in the course of inspection, maintenance, or replacement of the detector. ATCP 73.145(6)(6) Exception to installation requirements. The installation of carbon monoxide detectors is not required in a residential building if construction of the building was initiated before October 1, 2008, or if the department of safety and professional services approved the plans for the construction of the building under s. 101.12, Stats., and s. SPS 361.30, provided the building does not have an attached garage and any one of the following circumstances applies: ATCP 73.145(6)(b)(b) All of the fuel-burning appliances in the building are of a sealed-combustion type and are covered by the manufacturers’ warranties against defects. ATCP 73.145(6)(c)(c) All the fuel-burning appliances in the building are of a sealed-combustion type and are inspected in accordance with sub. (7) or (8) (b). ATCP 73.145(7)(a)(a) The operator shall arrange for the inspection of every sealed combustion appliance and the vents and chimneys serving the appliances in any residential building where a carbon monoxide detector has not been installed. ATCP 73.145(7)(b)(b) The inspection of a sealed combustion appliance, vents and chimneys shall satisfy the following requirements: ATCP 73.145(7)(b)1.1. The inspection of the sealed combustion appliance, vents and chimneys shall be for the purpose of determining carbon monoxide emission levels. ATCP 73.145(7)(b)3.3. The inspection shall be performed by an individual who holds certification issued under s. SPS 305.71 as an HVAC qualifier. ATCP 73.145(7)(b)4.4. If upon inspection the carbon monoxide emissions from a fuel burning appliance, vent or chimney are not within the manufacturer’s specifications, the appliance may not be operated until it is repaired. If the appliance is repaired, it shall be inspected again before it is used. ATCP 73.145(7)(b)5.5. The individual inspecting the sealed combustion appliance shall prepare a written, dated, and signed report identifying the level of carbon monoxide emissions and certifying whether or not carbon monoxide emissions are within the manufacturer’s specifications, which the operator shall retain for review by the department or its agent.