Register

Subchapter II – Responsibilities, Appeals, Petitions and Penalties

Subchapter III – Plan Review

Subchapter IV – Multifamily Building Permits

Subchapter V – Supervision and Inspection

Subchapter VI – Product and Standard Review and Approval

Subchapter VII – First Class City and Certified Municipality Approvals

Chapter Comm 62

Chapter Comm 62 is proposed to primarily contain the Wisconsin modifications of the 2000 International Building Code ®, as adopted in chapter Comm 61.

The following listing is a summary of the concerns identified by the Department and the various advisory councils relating to the use and application of the IBC and recommendations for changes and additions to or omissions from the IBC.

1.   Chapter 1 of the IBC, and numerous other sections of the IBC, contain extensive administrative and enforcement requirements that generally have been developed by municipal officials, for use by municipal officials in other states which do not have Wisconsin's emphasis on state-level enforcement and administration. Numerous modifications were developed by Division staff to orient these requirements to this emphasis, and to maintain other current administrative and enforcement procedures in Wisconsin, including those relating to regulation of existing or historic buildings. [See sections Comm 62.0100 (1); Comm 62.0202; Comm 62.0400 (1); Comm 62.0401; Comm 62.0402; Comm 62.0403 (2); Comm 62.0414; Comm 62.0415; Comm 62.0703; Comm 62.0712; Comm 62.0901 (1); Comm 62.0902; Comm 62.0903 (1), (4), and (5); Comm 62.0907 (1) and (3); Comm 62.0909; Comm 62.1407; Comm 62.1506; Comm 62.1603 (2); Comm 62.1604; Comm 62.1607; Comm 62.1612; Comm 62.1621; Comm 62.1802; Comm 62.1805; Comm 62.1809; Comm 62.1905; Comm 62.1914; Comm 62.1916; Comm 62.2101; Comm 62.2105; Comm 62.2108; Comm 62.2208; Comm 62.2303; Comm 62.2503; Comm 62.3102; Comm 62.3103; Comm 62.3104 (2); Comm 62.3109; Comm 62.3400 (1); and Comm 62.3406.]

2.   Section 115 of the IBC contains detailed requirements for unsafe buildings and structures, and includes directives for how local building officials are to address these buildings and structures. Text is proposed that would apply these requirements to all public buildings and structures and places of employment, which exist before, on, or after the effective date of the proposed rules. [Comm 62.0100 (2)]

3.   The proposal contains three modifications to the IBC for retaining Wisconsin's current electrical code, plumbing code, and private sewage code, rather than adopting the ICC codes for these three subjects. [Comm 62.0202 (1) (d), (i), and (j)]

4.   Several sections of the Wisconsin Statutes contain building construction criteria that supercede or are in addition to various IBC requirements. Several modifications to the IBC are proposed for maintaining compliance with these statutory criteria, which include use and occupancy classifications [Comm 62.0310], recycling space [Comm 62.0400 (2)], employee restrooms [Comm 62.0400 (3)], sixty-foot high-rise fire sprinkler thresholds [Comm 62.0403 (1)], retroactive fire sprinkler requirements for University of Wisconsin dormitories [Comm 62.0403 (1)], firewall identification [Comm 62.0705], fire hose threads [Comm 62.0901 (2)], thresholds for fire sprinklers or two-hour fire resistance in multifamily dwellings [Comm 62.903 (2)], mandatory fire sprinklers for all newly constructed University of Wisconsin dormitories [Comm 62.0903 (3)], retroactive fire alarm and detection system requirements [Comm 62.0907 (2)], barrier-free accessibility [Comm 62.1101 (1), Comm 62.1107 (1) and (3), and Comm 62.1109], smoking area signage [Comm 62.1109 (2) Note], prohibition of pay toilets [Comm 62.2902 (7)] protection of adjoining property [Comm 62.3300 (2)], barrier-free accessibility for fair housing in existing structures [Comm 62.3400 (1) and Comm 62.3408], community-based residential facilities for 9-20 unrelated adults [Comm 62.3400 (2)], and statewide requirements for historic buildings [Comm 62.3406].

5.   Proposed text would continue Wisconsin's current alternatives for isolating fuel-fired appliances in parking garages. [Comm 62.0406]

6.   Several modifications to the IBC were developed to retain current flexibility for achieving minimum levels of fire safety, which include fire separation distance to a no-build easement [Comm 62.0702], fire-resistance clarification for connections between buildings [Comm 62.0704], alternatives for fire-resistive floor, ceiling, and roof construction [Comm62.0719], fire resistance for cellulose insulation [Comm 62.0720], and manual wet fire sprinkler systems [Comm 62.0904].

7.   Although text is proposed that replaces the IBC fire sprinkler thresholds in multifamily dwelling buildings with Wisconsin's statutory thresholds for these fire sprinklers or two-hour fire resistance, a related section of the IBC, 705.1, is not proposed to be changed for these thresholds. Section 705.1 specifies that each portion of a building separated by one or more fire walls which comply with the section must be considered a separate building. Consequently, instead of using unpierced four-hour-rated fire walls to separate a large multifamily building into smaller buildings that individually are not required to have fire sprinklers or two-hour fire resistance, as Wisconsin currently allows, two-hour-rated fire walls with various protected openings could be used, for example, in wood-frame construction, in lieu of providing fire sprinklers in these multifamily buildings. Also, the IBC's building area and height limits would apply individually, but not cumulatively, to each portion that is separated in this fashion by these fire walls. [Comm 62.0903 (2)]

8.   Chapter 10 of the IBC contains the means of egress requirements for all buildings, including specific occupancy requirements. The means of egress requirements in the IBC consist of three separate and distinct parts, which are the exit access, the exit, and the exit discharge. While the current Wisconsin Commercial Building Code uses these same terms, they have not been applied consistently, especially in the occupancy chapters. It is anticipated that the overall impact of the means of egress chapter will be very small for most public buildings and places of employment. A few minor modifications are proposed relating to determination of occupant load for outdoor areas, guard tower exiting, and safe dispersal areas for buildings located more than 100 feet to a public way. [Comm 62.1003, 62.1005, and 62.1006]

9.   There are a number of IBC means of egress requirements that differ from the means of egress requirements currently applied to multifamily housing. This rule package maintains the IBC language without modification. The criteria that differ from the current Multifamily Dwelling Code requirements include the following:

•   The IBC requires all raised platforms greater than 30 inches above the floor to be protected with guardrails with a height of 42 inches (current requirement is 36 inches). This requirement applies to raised platform areas within the dwelling unit as well as those in the common-use areas of the building. [IBC 1003.2.12.1]

•   Open guards must have balusters or ornamental patterns such that a 4-inch diameter sphere cannot pass through any opening up to 34 inches above the floor. From a height of 34 inches to 42 inches above the floor, a sphere not more than 8 inches must not pass through the openings (current requirement is 6-inch sphere). [IBC 1003.2.12.2]

•   In the IBC, the stair tread must be at least 11 inches in depth and the riser height is limited to 7 inches (current requirements of 9 inches by 8 inches). These stairway tread and riser dimensions apply to stairways within the dwelling units and in all the common use areas. [IBC 1003.3.3.3]

•   The IBC does not recognize the use of a “rescue/jump" platform as a means of egress component for any occupancy, including dwelling units. However, the IBC does provide options for one exit under IBC 1005.2.2.

•   The current Multifamily code requires at least 2 ways out of every sleeping room. One of the means of egress may be a window. The IBC, in addition to the means of egress required to be provided, also mandates that basements and sleeping rooms below the fourth story have at least one exterior emergency and rescue opening. [IBC 1009.1]

10.   The IBC chapter 11 accessibility requirements are substantially equivalent to the federal Americans With Disabilities Act Accessibility Guidelines. Currently, the federal Access Board is rewriting the ADAAG standards to be consistent with the IBC format. Chapter Comm 69 currently uses the ADAAG standards as the base accessibility construction standards; therefore users of the code are familiar with the standards in the IBC, except for the new format. A number of minor changes are proposed to clarify the application of the code to certain occupancies, such as government-owned facilities, and to require parking signs to comply with Wisconsin Department of Transportation requirements. [Comm 62.1104]

11.   The accessibility requirements in the 2000 edition of the IBC relating to multifamily housing are not substantially equivalent to the federal fair housing law, so a number of changes are proposed to establish construction requirements that are substantially equivalent to the federal law as well as the state fair housing law. These changes include specifying that any building which is separated into smaller buildings by fire walls under the provisions of IBC section 705 must be considered one building when determining compliance with the fair housing criteria. [Comm 62.1101, Comm 62.1106, and Comm 62.1107]

12.   The current multifamily accessibility requirements require that at least one bathroom be designed for a higher level of accessibility, with all other bathrooms complying with the basic level of accessibility. This requirement is not part of the federal or state fair housing laws or the IBC accessibility requirements. This rule package proposes to discontinue this requirement and to instead use the IBC and ICC/ANSI A117.1 bathroom design requirements without modification. [IBC 1107.5.4 and ICC/ANSI A117.1 1003.11.3.1, 1003.11.3.2]

13.   Minor changes are proposed for clarifying the requirements for temperature control in interior environments and for drainage of interior courts. [Comm 62.1203 and Comm 62.1205]

14.   Based on Wisconsin's potential for extreme climate, and due to concern for the structural deterioration and associated health and welfare problems that can result from migration of moist, interior air into outside walls, air barrier requirements are proposed for exterior walls. [Comm 62.1403 and Comm 62.0202 (a)]

15.   Reference to the Urban Wildland Interface Code is deleted because adoption of that code is not included in this rule package. [Comm 62.1505]

16.   Several modifications to the IBC were developed by the Structural Review Council to clarify or simplify, but not weaken, the structural requirements, particularly for smaller buildings. These modifications include posting of live loads [Comm 62.1603 (1)], ground snow load alternatives [Comm 62.1608 (1)], an alternative snow exposure factor [Comm 62.1608 (2)], a wind load alternative [Comm 62.1609], a soil lateral load alternative [Comm 62.1610], clarification of earthquake loads [Comm 62.1614], alternative earthquake loads [Comm 62.1615], refinement of allowable pile and pier loads [Comm 62.1807 (3)], an alternative pile and pier load test [Comm 62.1807 (4)], a driven-pile alternative [Comm 62.1808], clarification of cast stone masonry [Comm 62.2103].

17.   Proposed text excludes the IBC requirements for structural tests and special inspections, except for joist hangers and roof tiles, due to belief that these requirements are substantially met by continuing Wisconsin's current construction oversight by registered professionals. [Comm 62.1700 (and Comm 61.50)]

18.   Three modifications developed by the Structural Review Council would improve inadequacies in the IBC. These modifications address piles and piers in subsiding areas [Comm 62.1807 (1), (2), and (5)], empirical design of masonry [Comm 62.2109], and moisture barriers for nondurable wood bearing on exterior masonry or concrete [Comm 62.2304].

19.   Several modifications provide alternative or minor additional plumbing requirements. These modifications address privacy and access to toilet rooms [Comm 62.1209], waiver of toilet rooms for unattended gasoline stations [Comm 62.1209 (2) (b)], maintenance of toilet rooms [Comm 62.2900 (1) and (2)], permanent and portable outdoor toilets [Comm 62.2900 (3)], enclosure of toilet fixtures [Comm 62.2900 (4)], substitution of urinals for water closets [Comm 62.2902 (1) (a)], cross-references to plumbing fixture requirements by other agencies [Comm 62. 2902 (1) (b) and (5)], lavatories for toilet rooms [Comm 62.2902 (3)], signage for toilet rooms [Comm 62.2902 (4)], remote toilet rooms for small retail stores [Comm 62.2902 (4)], and direct access to toilet rooms for customers in stores [Comm 62.2902 (6)].

20.   Three modifications are proposed for continuing Wisconsin's current practice of not applying or enforcing requirements for the design or installation of conveyors and personnel or material hoists. [Comm 62.3001]

21.   Proposed text requires that where ventilation openings are provided in hoistway walls, the openings must have guards securely fastened to the hoistway, to prevent creation of a shear point for maintenance and elevator inspectors. [Comm 62.3004 (1)]

22.   Floor drains, sumps, and sump pumps are permitted by the IBC in a hoistway shaft if they are directly connected to the storm or clear water drain system. Proposed text clarifies that a connection to a sanitary system is prohibited and that plumbing systems not used in connection with the operation of the elevator may not be located in the elevator equipment rooms. [Comm 62.3004 (2) and Comm 62.3006 (2)]

23.   Proposed text clarifies that where elevator machine rooms serve pressurized elevator hoistways and are not directly connected to the hoistway, the machine rooms are not required to be pressurized. [Comm 62.3006 (1)]

24.   Proposed text clarifies that buildings connected by pedestrian access structures are considered separate structures. [Comm 62.3104]

25.   Proposed text would continue Wisconsin's current practice of not regulating encroachments into a public right-of-way. [Comm 62.3200]

26.   Proposed text would continue Wisconsin's current practice of not regulating safeguards during private-sector construction, except for maintaining egress, preventing water accumulation, and protecting adjoining property. [Comm 62.3300]

27.   Three National Fire Protection Association standards that are adopted in the IBC are proposed to be replaced with more recent versions which are currently adopted in Wisconsin. [Comm 62.3500]

28.   Proposed text would continue Wisconsin's current practice of not regulating employee qualifications, boards of appeals, agricultural buildings, fire districts, supplemental barrier-free accessibility, rodent proofing, flood-resistant construction, signs, and patio covers. [Comm 62.3600]

Chapter Comm 63

The International Energy Conservation Code™ contains energy conservation requirements relating to the design of building envelopes for adequate thermal resistance and low air leakage, and the design and selection of mechanical, electrical, service water-heating and illumination systems and equipment, which will enable the effective use of energy in new and altered building construction. The IECC is divided into chapters that apply to low-rise residential buildings (<3 stories in height), and to commercial buildings, which includes high-rise residential buildings (4 stories or more in height), and non-residential buildings of any height.

The IECC is applied based on the occupancy classification of the building (residential or commercial) and how compliance with the energy conservation requirements will be demonstrated. The intent is that any of the options chosen will provide the same levels of energy conservation. The following is how the IECC is to be applied:

•   Chapter 4, 5 or 6 of the IECC may be used for low-rise residential buildings.

•   Chapter 7 or 8 of the IECC may be used for high-rise residential buildings and all commercial buildings.

IECC chapter 7 requires commercial buildings to comply with ASHRAE/EIS, Energy Code for Commercial and High-rise Residential Buildings. The existing chapter Comm 63 is basically the ASHRAE 90.1 Standard with various modifications and additions to improve energy conservation, and application and code enforcement. Therefore, the existing chapter Comm 63 with the improvements is substantially equivalent to chapter 7 of the IECC. It is proposed to maintain the existing Comm 63 requirements and locate them in subchapter III of the new proposed chapter Comm 63. Commercial buildings may be designed for compliance with the energy conservation requirements in chapter Comm 63, subchapter III as one option, or with the requirements in IECC chapter 8 as the other option. It is also the intent of these rule changes to ensure that either option chosen will result in equivalent energy conservation.

The following listing is a summary of the major concerns identified by the Department and the Energy Conservation Specialty Council relating to the use and application of the IECC and recommendations for changes and additions to or omissions from the IECC.

1.   In general, the IECC requirements are substantially equivalent to the energy conservation requirements specified in the existing chapter Comm 63 for commercial buildings. However, the IECC has more stringent energy conservation requirements for low-rise residential buildings, especially the building envelope requirements. To evaluate how the IECC requirements would impact the design of residential buildings, the Department performed a survey of current construction plans for residential buildings located throughout the state to see if the buildings complied with the stricter IECC requirements. The results showed that 90% of the new construction plans surveyed already met the stricter building envelope requirements and most designers and owners would not be affected adversely by using the IECC requirements. These changes are viewed as useful and beneficial to the owners of residential buildings.

2.   Approved vapor retarders are required on all frame walls, floor and ceilings, instead of permitting the option to ventilate these areas. This change is necessary for both infiltration and condensation control in Wisconsin's severe climate. [See sections Comm 63.0502, Comm 63.0802 (2), and Comm 63.1011 (4)]

3.   Floors over outdoor air are required to have the same U-values as floors over unheated spaces. The minimum levels of insulation in the IECC are not cost effective for the owner. All other insulation levels were determined to be cost effective using a life-cycle cost economics analysis. A review of residential plans received by the Department indicated that 90% of new construction already meets the IECC thermal envelope requirements. [Comm 63.0502]

4.   The heating load calculations are to be determined in accordance with the requirements in s. Comm 63.1023. Both Comm 63.1023 and IECC section 503.3.1 follow the ASHRAE Handbook of Fundamentals; however, Comm 63.1023 includes specific parameters for areas such as indoor and outdoor design conditions, envelope conditions and lighting loads not included in the ASHRAE Handbook. Comm 63.1023 provides better direction to the users in the application of the code. [Comm 63.0503 and Comm 63.1023]

5.   Interior design temperatures are to be maintained as specified in chapter Comm 64, Heating, Ventilating and Air Conditioning Code. [Comm 63.0003 (3)]

6.   Adjustments for local exterior design conditions are to be determined through local weather resources, including computer programs for equipment sizing. [Comm 63.0302 (1)]

7.   Pipe insulation for both commercial and residential buildings is to be provided in accordance with ASHRAE 90.1, Table 403.2.9.1. The new table for pipe insulation will be applied in all the options available for showing compliance with the energy conservation requirements. Table 63.1029 translates the inches of insulation required into R-values. This reduces the need for all parties involved from performing cumbersome calculations. [Comm Table 63.1029]

8.   Supply ducts located in the plenum and within the building envelope are to be insulated to R-4 in addition to the requirements for unconditioned areas and outdoor areas. Moisture damage to building materials may occur from condensation from uninsulated ducts within a plenum. There is little, if any, additional cost to go from uninsulated sheet metal material to an R-4 insulated duct material. [Comm 63.0503 (2) (b) and Comm 63.0803 (2) (e)]

9.   The IECC requires ducts in unconditioned areas to be insulated to R-5; however, the typically available R-5 ductwrap is only R-4.6 after it is installed in accordance with the manufacturer's instructions. This discrepancy has caused problems in the application and enforcement of the code. It is proposed to require ducts in these areas to be insulated to R-4. This requirement will be applicable in all options used to show compliance with the energy conservation requirements. [Comm 63.0503 (2) (b) and Comm 63.0803 (2) (e)]

10.   Recessed lighting installed in the building envelope must be sealed to reduce infiltration. [Comm 63.1011 (3), Comm 63.0602 (2), and Comm 63.0802 (4)]]

11.   Automatic dampers are required on all outdoor air intakes. The IECC allows gravity or automatic dampers to be used. Experience indicates that gravity dampers are opened by wind subjecting occupants to drafts and results in higher energy costs to owners. [Comm 63.0503 (2) (c) and Comm 63.0803 (2) (d) and (3) (b)]

12.   Light power budgets and controls requirements are to comply with Comm 63, subchapter III, Part 5, even if the IECC chapter 8 option is chosen. The lighting requirements in Comm 63 are in an improved format and provide for the most efficient use of lighting for energy conservation. [Comm 63.0504 (4) and Comm 63.0805]

13.   Owners of commercial buildings are given options for showing compliance with the energy conservation code. One option is to show compliance with ASHRAE 90.1. Since chapter Comm 63, subchapter III is essentially ASHRAE 90.1 with various amendments for improving energy conservation, application and enforcement, it is proposed to substitute language for IECC chapter 7 to require compliance with Comm 63. [Comm 63.0701]

14.   A modification was made to Table 63.1049 relating to interior lighting power allowances for merchandising display lighting. It is proposed to allow the smaller of the actual wattage of the lighting equipment for displays or a 0.8 W/ft2 times the floor area of the display area to be added to the interior lighting power. [Table 63.1049, Part b]

15.   In commercial buildings, each fan system is required to have economizer controls that comply with s. Comm 63.1031. The IECC does not provide for the most efficient use of that equipment and the owner would be missing opportunities to save energy and money. This requirement for the use of economizers will not be applied to low-rise residential buildings. [Comm 63.0803 (2) (c) and Comm 63.0803 (3) (b) and (d)]

16.   Currently, under chapter Comm 63 off-hour or set-back HVAC controls are required in both residential and commercial buildings. However, in the IECC off-hour controls are required only in commercial facilities. Since it was the goal the Department to stay as close as possible to the IECC requirements and limit Wisconsin based requirements, it was decided not to apply the off-hour controls to residential buildings.

17.   The IECC energy conserving requirements for residential pool water heaters will not be applied. They are inconsistent with requirements for commercial facilities, the on-off switch requirements are covered by other codes; the pool cover requirement is too vague to enforce and the need for a time switch to allow for lower time-of-day utility rates should be based on consumer economics. [Comm 63.0504 (3)]

(A more detailed comparison of the current and proposed requirements for chapter Comm 63 is available at the Safety and Buildings' web site at www.commerce.state.wi.us. or can be obtained from Roberta Ward at [e-mail] or at 608/266-8741 and 608/264-8777, TTY.)

Chapter Comm 64

This rule revision, which repeals and recreates chapter Comm 64, relating to heating, ventilating and air conditioning, includes adoption of the 2000 International Mechanical Code ®, with various omissions, additions or substitutions.

The following listing is a summary of the major concerns identified by the Department and the HVAC Specialty Council relating to the use and application of the IMC and recommendations for changes and additions to or omissions from the IMC.

1.   The proposal is to continue to have the designer or installer provide the owner or operator with written instructions on the operation and maintenance of the equipment. The IMC is silent on this issue and experience proves that properly maintained equipment is less costly to operate and increases the life of the equipment. [See section Comm 64.0102]

2.   The IMC requires that all appliances be listed and labeled unless approved as a modification; the proposal is to retain the current provisions for approval of unlisted equipment. [Comm 64.0301]

3.   The proposal is to maintain the equipment testing and balancing provisions of the current code to assure proper operation of equipment. [Comm 64.0304 (1)]

4.   The proposal is to keep indoor design temperatures below 68oF for some occupancies as currently allowed. Current provisions allow spot heating, and waiving of heating requirements for seasonal occupancies. Such allowances are in recognition high costs of operation during the Wisconsin heating season. [Comm 64.0309]

5.   The proposal is to recognize that natural ventilation of some occupancies in Wisconsin may be ineffective and may thus compromise indoor air quality. Under the IMC, natural ventilation is allowed as an option in all spaces, except for: smoking lounges, toilet rooms, multifamily parking structures and public locker rooms. Current requirements for mechanical ventilation in many more occupancies are proposed to be maintained. [Comm 64.0401 (1)]

6.   The proposal maintains current requirements for required building exhaust ventilating systems to operate continuously when people are in the building. An option is also proposed to allow rooms with 2 or fewer toilet fixtures to be exhausted only when such rooms are occupied. The exhaust fan could then be interconnected with the light switch. [Comm 64.0401 (2)]

7.   The proposal also is to continue allowing current exceptions for reducing clearances for intake and exhaust openings that have been found to not compromise indoor air quality, but can reduce installation costs. [Comm 64.0401 (4)]

8.   This proposal is to allow an option to use an engineered system that will produce the same indoor air quality as following the outdoor air ventilation rates as prescribed in the code. [Comm 64.0403 (2)]

9.   A revised IMC Table 403.3 is proposed which includes the following: requires the same outdoor air requirements for similar occupancies; makes additional entries for common occupancies from the current Table Comm 64.05; reduces outside air to 7.5 cfm/person in most occupancies as under the current code; requires the use of AIA Guidelines for Hospitals and Nursing Home Occupancies; and garage ventilation is reduced from 1.5 cfm/sf to 0.5 cfm/sf of exhaust. [Table 64.0403]

10.   Some occupancy requirements are proposed to be maintained from the current code: natural ventilation may be used in smaller toilet rooms or janitor closets; and pool ventilation may be reduced with humidity control. [Comm 64.0403]

11.   The proposal does not adopt IMC 403.3.2 that requires the amount of outside air to be based on a complex set of room by room calculations. It is replaced with current provisions that allow the amount of outside air to be based on the total number of occupants served by the system, rather than separate calculations for each room. The minimum air change rate is also retained. This is necessary when the outside air is based on the total number of occupants served by the system. The proposal provides for the movement of 'cleaner' air from areas of low occupancy to those of high occupancy. The air movement also increases filter effectiveness. For VAV systems, a minimum movement is needed. [Comm 64.0403 (6)]

12.   Wisconsin experienced failure in automatic sensing devices installed in place of continuous exhaust in parking garages. The proposal includes additional provisions including the requirement to operate exhaust for at least five hours per day to assure effective exhaust results. [Comm 64.0404]

13.   The proposal is to delete the requirement for an exhaust system where contamination may be simply "irritating." The current code provision does not require a system to accommodate those individuals who may have high sensitivity to contaminants. Where contamination is injurious to health or safety, an exhaust system must be installed. [Comm 64.0502]

14.   The IMC has additional, more detailed requirements for commercial kitchen exhaust than the current chapter Comm 64. The proposal is to provide a performance requirement for alternatives to welded seams and joints which will provide more flexibility in installation and lower costs. [Comm 64.0500, Comm 64.0506, and Comm 64.0507]

15.   Another proposal relating to commercial kitchen exhaust is to require commercial kitchen fans for use in grease-laden air to be so listed. [Comm 64.0506]

16.   The proposal is to allow the reduction in the clearances between heaters and duct lining when the lining is so listed. [Comm 64.0604]

17.   The proposal adds a requirement for some healthcare facilities to comply with AIA (American Institute of Architects) guidelines for filtration. [Comm 64.0605]

18.   The definition of 'unusually tight construction' has been modified for chs. Comm 64 and 65 to reflect current Wisconsin building construction standards. In referencing this modification, the requirement for outside air for combustion has also been modified to allow greater use of inside air for combustion purposes (with restrictions). [Comm 64.0702]

19.   The IMC prohibits the use of unvented, permanently installed liquid- and solid-fueled equipment. As under the current code, both installed and portable unvented equipment is prohibited under the proposal. [Comm 64.0801]