Register December 2015 No. 720
Chapter SPS 323
HEATING, VENTILATING AND AIR CONDITIONING
Subchapter I — Scope
Subchapter II — Design
Subchapter III — Heating Equipment
Selection of equipment.
Types and location of equipment.
Mechanical draft systems.
Equipment maintenance information.
Subchapter IV — Delivery Systems
Air distribution systems.
Dampers, registers and grilles.
Subchapter V — Chimneys and Vents
Factory-built chimneys or vents.
Chimney connectors, smoke pipes and stovepipes.
Multiple appliance venting.
Subchapter VI — Fuel Supply Systems
Subchapter VII — Equipment Location and Operation
Ch. SPS 323 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 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
Cr. Register, November, 1979, No. 287
, eff. 6-1-80.
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.
The heating and cooling systems shall be designed to maintain the indoor design temperature at outdoor design conditions.
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.
(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.
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.
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.
Kitchen range hoods that exhaust air from the kitchen area are considered as exhaust ventilation for balancing and makeup purposes.
Kitchen range hoods that are listed and installed to recirculate air without exhausting it are not required to be balanced.
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.
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.