SPS 371.07 Seal of quality.
Pursuant to s. 101.175 (2)
, Stats., the purpose of this section is to establish the requirements for the issuance of the seal of quality. Any manufacturer or retailer prior to the sale in this state of any solar energy system or component may request the department to issue a seal of quality for each solar energy system or component which meets or exceeds the quality standards established in this chapter.
(1) Application for approval.
An application for the seal of quality for a solar energy system or component shall be submitted to the department. Upon receipt of a fee and a written request, the department may issue an approval number for the solar energy system or component. The department shall review and make a determination on an application for approval within 30 business days of receipt of all forms, fees, plans and documents required to complete the review.
SPS 371.07 Note
See ch. SPS 302
for fees relating to material approval.
(2) Issuance of approval.
An approval number shall be issued if the department determines that the solar energy system or component meets or exceeds the requirements of this chapter.
(3) Required data.
Sufficient data, tests and other evidence to prove that the solar energy system or component meets or exceeds the standards established in this chapter shall be submitted.
(4) Revocation of approval.
The department may revoke any approval issued under this section for any false statements or misrepresentation of facts on which the approval was based.
(5) Misrepresentation, misuse or duplication.
Pursuant to s. 101.175 (6)
, Stats., misrepresentation, misuse or duplication of the department seal of quality issued under this section shall be deemed deceptive advertising under s. 100.18 (9m)
(6) False endorsement.
A person may not advertise that the seal of quality issued by the department is an endorsement of the product by the department or the state of Wisconsin.
SPS 371.07 History
Cr. Register, June, 1986, No. 366
, eff. 7-1-86.
SPS 371.10 Definitions.
In this chapter, the following definitions shall apply.
“Absorber" means that part of a solar collector whose primary function is to absorb radiant energy and transfer it to a fluid. In photovoltaic solar energy systems, the function is to generate electrical energy.
“Active solar energy system" means any mechanical system which collects solar radiation in the form of thermal energy and uses a heat transfer fluid to transport the thermal energy to meet load requirements or to thermal storage.
“Air system" means an active solar energy system that uses air as the heat transfer fluid.
“Auxiliary energy system" means equipment using non-solar energy sources to supplement or backup the output provided by a solar energy system.
“Building" means a structure for support, shelter or enclosure of persons or property, other than a one- or 2-family dwelling.
“Closed loop system" means an active solar energy system in which a closed piping system, containing a fixed charge of heat transfer fluid, transfers heat from collectors to storage or use.
“Collector" means a device designed to absorb incident solar radiation and to transfer the energy to a fluid passing through it.
“Collector cover" means the material covering the aperture to provide thermal and environmental protection.
“Component" means a distinct device or assembly that forms a functional part of a solar energy system including, but not limited to, collectors, thermal storage, heat exchangers, controls, pumps, fans, dampers and valves. Unless otherwise specified, such as a building component, a component shall have the above definition.
“Department" means the department of safety and professional services.
“Design pressure" means the maximum allowable continuous or intermittent pressure for which a specific part of a solar energy system is designed to operate safely and reliably.
“Design temperature" means the maximum allowable continuous or intermittent temperature for which a specific part of a solar energy system is designed to operate safely and reliably.
“Drainback system" means a closed loop system which allows gravity draining of the heat transfer fluid into lower portions of the solar loop under prescribed circumstances.
“Draindown system" means an active solar energy system in which the fluid in the solar collector is drained from the solar energy system under prescribed circumstances.
“Dwelling" means any building which contains one or 2 dwelling units.
“Flammable liquid" means a liquid having a flash point below 100ºF and having a vapor pressure not exceeding 40 psia at 100ºF.
“Heat exchanger" means a device designed to transfer heat between two physically separated fluids.
“Heat transfer fluid" means the medium used to transfer energy from the solar collectors to the thermal storage or load.
“Heated space" means any space maintained at a temperature of at least 50ºF.
“Hot water" means water heated for domestic or industrial use.
“Liquid system" means an active solar energy system that uses liquid as the heat transfer fluid.
“Maximum operating pressure" means the maximum pressure experienced in a system, under any normal operating conditions including no-flow.
“Maximum operating temperature" means the maximum temperature experienced in a system, under any normal operating conditions including no-flow.
“No-flow condition" means the condition that results when the heat transfer fluid does not flow through the collector array due to normal shut-down or malfunction.
“Open loop system" means an active solar energy system in which water for domestic or industrial use is directly heated in collectors.
“Outgassing" means the emission of gases by component materials usually during exposure to elevated temperatures or reduced pressures.
“Owner" means any person having a legal or equitable interest in the solar energy system.
“Photovoltaic" means a solar energy system that converts radiant solar energy directly into electrical energy.
Free from impurities present in amounts sufficient to cause disease or harmful physiological effects and conforming in its bacteriological and chemical quality to the requirements specified in ch. NR 809
“Primary solar duct system" means the duct system between the collectors and thermal storage and the ducts making connection to the space distribution system.
“Seal of quality" means a written approval by the department documenting certification and compliance with specific quality standards.
“Solar energy system" means equipment which directly converts and then transfers or stores solar energy into usable forms of thermal or electrical energy.
“System designer" means a person who offers for sale a solar energy system as a complete package, the components of which may be produced by different manufacturers.
“Thermal resistance (R)" means a measure of the ability to retard the flow of heat.
SPS 371.10 Note
Note: The R-value is the reciprocal of the heat transfer coefficient, expressed by U (R = 1/U). The higher the R-value of a material, the more difficult is it for heat to flow through the material.
“Thermal storage" means a container and its contents used for storing thermal energy.
“Tilt angle" means the angle above horizontal of a plane surface.
“Toxic fluids" means fluids which are poisonous or irritating in nature or composition.
SPS 371.10 History
Cr. Register, June, 1986, No. 366
, eff. 7-1-86; correction in (31) (b) made under s. 13.93 (2m) (b) 7., Stats., Register, August, 1995, No. 476
; correction in (11) made under s. 13.92 (4) (b) 6., Stats., Register December 2011 No. 672
SPS 371.20 Purpose.
Pursuant to s. 101.175 (4) (c)
, Stats., this subchapter establishes quality standards for materials and workmanship for solar energy systems and components. Sections SPS 371.21
shall apply to active solar energy systems and components. Section SPS 371.30
shall apply to photovoltaic solar energy systems and components.
SPS 371.20 Note
The requirements of this subchapter are recommended standards. See s. SPS 371.03
SPS 371.20 History
Cr. Register, June, 1986, No. 366
, eff. 7-1-86; correction made under s. 13.92 (4) (b) 7.
, Stats., Register December 2011 No. 672
SPS 371.21 General installation requirements. SPS 371.21(1)(a)(a) Access.
Components shall be accessible for required routine maintenance without trespassing on adjoining property or disassembling any major portion of the solar energy system, building or dwelling.
Components within 10 feet horizontally of a chimney or vent shall be at least 2 feet below the top of the chimney or vent.
The location of components may not interfere with the operation of required doors, windows or other building components.
SPS 371.21 Note
Note: Components may be subject to local zoning requirements.
Combustible materials may not be exposed to components having maximum operating temperatures that can cause ignition. Clearances to combustible materials specified in the component listing or by the component manufacturer shall be maintained.
Clearance between combustible materials and unlisted components shall be maintained in accordance with Table 371.21-A.
Clearance Between Combustible Materials and
- See PDF for table
1If approved insulation protects the component, the required clearance may be reduced by 50%.
(2) Material tests and standards.
The installation of, as well as all materials used in the construction of, solar energy systems shall meet the applicable requirements specified in chs. SPS 320
, and 381
and this chapter. Where different chapters specify different requirements, the most restrictive material test and installation standard shall apply.
SPS 371.21(3)(a)(a) General.
Insulation of piping, ducts and thermal storage containers shall be of a type satisfactory for its intended purpose and installed in accordance with recognized standards and practices.
1. `Flame spread rating.'
The flame spread rating for all insulation materials may not exceed the following values:
Plastic foam: 75
Other insulation materials: 150
2. `Compressive loads.'
Insulation shall be protected against compressive loads from pipe and duct supports and storage tanks.
3. `Exterior insulation.'
Exterior insulation shall be capable of withstanding moisture, ultraviolet radiation, and environmental exposure.
Pipes of nominal size of one and one-half inch or larger shall be insulated to a thermal resistance value of R-4 or greater. All other piping in the solar energy system shall be insulated to a thermal resistance value of R-3 or greater. A vapor barrier, if installed, shall be located on the warm side of the insulation.
Ductwork located in unheated spaces shall be insulated to a thermal resistance value of R-11 or greater, where space permits. Ductwork in heated spaces shall be insulated to a thermal resistance value of R-3 or greater. A vapor barrier, if installed, shall be located on the warm side of the insulation.
SPS 371.21(3)(d)1.1. `Thermal storage - liquid systems.'
Thermal storage for liquid systems located in unheated spaces shall be insulated to an overall thermal resistance value of R-16 or greater. Thermal storage for liquid systems installed in heated spaces shall be insulated to an overall thermal resistance value of R-11 or greater.
2. `Thermal storage - air systems.'
Thermal storage for air systems located in unheated spaces shall be insulated to an overall thermal resistance value of R-38 or greater. Thermal storage for air systems installed in heated spaces shall be insulated to an overall thermal resistance value of R-11 or greater.
SPS 371.21(4)(a)(a) Protection against vermin.
All penetrations of the building or dwelling by components shall be properly sealed with noncombustible material to prevent the entrance of vermin.
(b) Protection against vehicular or pedestrian traffic.
Components exposed to vehicular or pedestrian traffic shall be protected against impact damage.
(c) Protection against water penetration.
All penetrations by components into a building or dwelling from the outside shall be properly sealed and waterproofed with approved materials to prevent leaks, insects and drafts from entering the building or dwelling. All penetrations shall be made using weatherproof devices which will allow for expansions and contractions.
(d) Protection against decay and termites.
Wood used in the construction of the collector or mounting, and exposed to outdoor conditions shall be pressure-treated with preservative or shall be a naturally durable, decay resistant species of lumber and shall be protected against termites.
(e) Protection from heated components.
Components which are maintained at temperatures above 170°
F shall be protected from human contact. The protections may be in the form of insulation, metal or plastic guards.
(5) Smoke detectors.
All dwellings that contain air systems with wood-frame collectors shall be provided with smoke detectors as specified in s. SPS 321.09
(6) Fire protection.
The design and installation of the solar energy system and components shall provide a level of fire safety consistent with chs. SPS 320
for one- and 2-family dwellings, or chs. SPS 361
for commercial buildings.