Register December 2015 No. 720
Chapter SPS 323
HEATING, VENTILATING AND AIR CONDITIONING
Subchapter I — Scope
Subchapter II — Design
Subchapter III — Heating Equipment
SPS 323.03 Selection of equipment.
SPS 323.04 Types and location of equipment.
SPS 323.045 Solid-fuel-burning appliances.
SPS 323.05 Safety controls.
SPS 323.06 Combustion air.
SPS 323.062 Mechanical draft systems.
SPS 323.065 Equipment maintenance information.
Subchapter IV — Delivery Systems
SPS 323.07 Air distribution systems.
SPS 323.09 Dampers, registers and grilles.
Subchapter V — Chimneys and Vents
SPS 323.11 General requirements.
SPS 323.12 Masonry chimneys.
SPS 323.13 Factory-built chimneys or vents.
SPS 323.15 Chimney connectors, smoke pipes and stovepipes.
SPS 323.155 Multiple appliance venting.
SPS 323.156 Condensate drains.
Subchapter VI — Fuel Supply Systems
Subchapter VII — Equipment Location and Operation
SPS 323.17 Equipment location.
Ch. SPS 323 Note
Note: Chapter Ind 23 was renumbered to be chapter ILHR 23,
Register, February, 1985, No. 350, eff. 3-1-85. Chapter ILHR 23 was renumbered Chapter Comm 23 under s. 13.93 (2m) (b) 1., Stats., and corrections made under s. 13.93 (2m) (b) 7., Stats.,
Register, January, 1999, No. 517. Chapter Comm 23 was renumbered chapter SPS 323 under s. 13.92 (4) (b) 1., Stats.,
Register December 2011 No. 672.
SPS 323.01
SPS 323.01
Scope. The provisions of this chapter shall apply to the design, installation and construction of all heating, ventilating and air conditioning systems in dwellings covered by this code.
SPS 323.01 History
History: Cr.
Register, November, 1979, No. 287, eff. 6-1-80.
SPS 323.02
SPS 323.02
Design. Every dwelling shall be equipped with a heating system designed in accordance with this section. Heating equipment requirements may be waived for recreational dwellings used only during the non-heating season. Where a cooling system is provided, the cooling requirements of this section shall be met.
SPS 323.02(1)(a)(a) The heating and cooling systems shall be designed to maintain the indoor design temperature at outdoor design conditions.
SPS 323.02(1)(b)
(b) When requested, room-by-room heat loss and heat gain calculations shall be furnished.
SPS 323.02 Note
Note: See Appendix for outdoor design temperature map.
SPS 323.02(2)
(2) Distribution systems. Distribution systems shall be sized and located to satisfy the heating and cooling loads of each conditioned space. When requested, a layout of the distribution system shall be furnished to show that the system meets the requirements of this code.
SPS 323.02(3)(a)2.
2. Automatic or gravity dampers that close when the system is not operating shall be provided for outdoor air intake and exhaust.
SPS 323.02(3)(b)1.1. General. Except as provided under
subd. 2., mechanical ventilation systems shall be balanced.
SPS 323.02(3)(b)2.
2. Exception. Passive intake air ducts providing makeup air for intermittent exhaust fans shall be sized to provide at least 40% of the total air that would be exhausted with all intermittent exhaust ventilation in the dwelling operating simultaneously.
SPS 323.02(3)(b)3.a.a. Kitchen range hoods that exhaust air from the kitchen area are considered as exhaust ventilation for balancing and makeup purposes.
SPS 323.02(3)(b)3.b.
b. Kitchen range hoods that are listed and installed to recirculate air without exhausting it are not required to be balanced.
SPS 323.02(3)(b)4.a.a. Infiltration may be considered as makeup air for balancing purposes only where there are no naturally vented space- or water-heating appliances in the dwelling.
SPS 323.02(3)(b)4.b.
b. For the purpose of complying with this subdivision, naturally vented space- or water-heating appliances are those that take combustion or dilution air from inside the dwelling, including unsealed fireplaces and draft hood appliances with power venting.
SPS 323.02 Note
Note: Whole-house fans that are used in the summer to bring cool night air in through open windows and exhaust into the attic are considered to be a supplemental cooling system rather than part of the ventilation system.
