2012 Fiscal Impact International Mechanical Code

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Roderick Shelton
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1 2012 Section No Item Code Information - bold text = new text found in 2012 strike out = text deleted and not found in the 2012 Equipment and appliances on roofs or elevated structures: Item 2. Ladders shall have rung spacing not to exceed 14 inches (356 mm) on center. The uppermost rung shall be a maximum of 24 inches (610 mm) below the upper edge of the roof hatch, roof or parapet, as applicable. (Applies to multi-story buildings and E occupancy, total ACDR's 1,694. Cost for fewer rungs is $10.00 a ladder per building. Cost savings for 1,694 buildings multiplied by $10.00 equals $16,904 in savings. Based on 2011 information. Resources: Shelly Wakefield, Darrel Cross.) -$16, General Ventilation required. Every occupied space shall be ventilated by natural means in accordance with Section 402 or by mechanical means in accordance with Section 403. Where the air infiltration rate in a dwelling unit is less than 5 air changes per hour when tested with a blower door at a pressure of 0.2-inch water column (50 Pa) in accordance with Section of the International Energy Conservation Code, the dwelling unit shall be ventilated by mechanical means in accordance with Section 403. (Fewer air blower tests required at an estimate of a 2 hour test at $200 an hour. Applies to R occupancies, a total 223 ACDR's. 2 hours multiplied by $200 hourly fee multiplied by 223 equals a savings of $89,200. Based on 2011 information. Resources: Shelly Wakefield) -$89, /28/13 Draft 1

2 Section No. Code Information - bold text = new text found in 2012 strike out = text deleted and not found in the all Ventilation, General: Opening location. Outdoor air exhaust and intake openings shall be located a minimum of 10 feet (3048 mm) from lot lines or buildings on the same lot. Where openings front on a street or public way, the distance shall be measured to the centerline of the street or public way. Exceptions: 1. Group R Exhaust outlets for environmental air exhaust openings shall be located not less than 3 feet (914 mm) from property lines and not less than 3 feet (914 mm) from openings into the building Intake openings. Mechanical and gravity outdoor air intake openings shall be located a minimum of 10 feet (3048 mm) horizontally from any hazardous or noxious contaminant source, such as vents, chimneys, plumbing vents, streets, alleys, parking lots and loading docks, except as otherwise specified in this code. Where a source of contaminant is located within 10 feet (3048 mm) horizontally of an intake opening, such opening shall be located a minimum of 2 feet (610 mm) below the contaminant source. The exhaust from a bathroom or kitchen in a residential dwelling shall not be considered to be a hazardous or noxious contaminant Exhaust openings. Outdoor exhaust openings shall be located so as not to create a nuisance. Exhaust air shall not be directed onto walkways Flood hazard. [B] For structures located in flood hazard areas, outdoor exhaust and air intake openings shall be at or above the design flood elevation. Unknown 8/28/13 Draft 2

3 2012 Section No Cont Code Information - bold text = new text found in 2012 strike out = text deleted and not found in the 2012 Intake opening location. Air intake openings shall comply with all of the following: 1. Intake openings shall be located a minimum of 10 feet (3048 mm) from lot lines or buildings on the same lot. 2. Mechanical and gravity outdoor air intake openings shall be located not less than 10 feet (3048 mm) horizontally from any hazardous or noxious contaminant source, such as vents, streets, alleys, parking lots and loading docks, except as specified in Item 3 or Section Outdoor air intake openings shall be permitted to be located less than 10 feet (3048 mm) horizontally from streets, alleys, parking lots and loading docks provided that the openings are located not less than 25 feet (7620 mm) vertically above such locations. Where openings front on a street or public way, the distance shall be measured from the closest edge of the street or public way. 3. Intake openings shall be located not less than 3 feet (914 mm) below contaminant sources where such sources are located within 10 feet (3048 mm) of the opening. 4. Intake openings on structures in flood hazard areas shall be at or above the elevation required by Section 1612 of the International Building Code for utilities and attendant equipment. (Exception for R3 was deleted and R3 is now required to meet the code)(offset for vent opening changes: a road width, typical 12'. and 1', from change from 2' to 3'. Total change in assumed duct legnth is 13'. Typical 13' long 12"x8"" duct is. 4,174 ACDR's for mechanical, subtract 506 ACDR's for hood installations equals 3,668 applicable projects. 3,668 ACDR's multiplied by $ equals $. Resources: Mara Snyder, Kari Thompson) 8/28/13 Draft 3

4 Exhaust Systems. General: Pressure equalization. Mechanical exhaust systems shall be sized to remove the quantity of air required by this chapter to be exhausted. The system shall operate when air is required to be exhausted. Where mechanical exhaust is required in a room or space in other than occupancies in R-3 and dwelling units in R-2, such space shall be maintained with a neutral or negative pressure. If a greater quantity of air is supplied by a mechanical ventilating supply system than is removed by a mechanical exhaust for a room, adequate means shall be provided for the natural or mechanical exhaust of the excess air supplied. If only a mechanical exhaust system is installed for a room or if a greater quantity of air is removed by a mechanical exhaust system than is supplied be a mechanical ventilation supply system for a room, adequate make-up air consisting of supply air, transfer air or outdoor air shall be provided to satisfy the deficiency. The calculated building infiltration rate shall not be utilized to satisfy the requirements of this section. (Average $300 cost saving per R-2 occupancy. 58 ACDR's with an average of 27 apartments multiplied by $300 equals $469, Based on 2011 information. Resources: Mr. White) Clothes Dryer Exhaust. Duct length: New Section - Specified length. The maximum length of the exhaust duct shall be 35 feet (10668 mm) from the connection to the transition duct from the dryer to the outlet terminal. Where fittings are used, the maximum length of the exhaust duct shall be reduced in accordance with Table (Average $275 cost savings per R-2 occupancy. 58 ACDR's with an average of 27 apartments multiplied by $275 equals $432,030. Based on 2011 information. Resources: Mr. White) -$469, $432, /28/13 Draft 4

5 Clothes Dryer Exhaust: New Section - Protection required. Protective shield plates shall be placed where nails or screws from finish or other work are likely to penetrate the clothes dryer exhaust duct. Shield plates shall be placed on the finished face of all framing members where there is less than 1 1/4 inches (32 mm) between the duct and the finished face of the framing member. Protective shield plates shall be constructed of steel, have a thickness of inch (1.6 mm) above sole plates and below top plates. (Average shield plate box contains 50 shields and costs $ Assume two boxes per project are required. ACDR's applied to code, Type V-A= 200, Type V-B= 1,404, Type I-A=88, Type II-B=1542, total 3,234 ACDR's. $40.00 in materials times 3,234 equals $129, Based on 2011 information. Resources: Shelly Wakefield) $129, /28/13 Draft 5

6 Clothes Dryer Exhaust: New Section Common exhaust systems for clothes dryers located in multistory structures. Where a common multistory duct system is designed and installed to convey exhaust from multiple clothes dryers, the construction of the system shall be in accordance with all of the following: 1. The shaft in which the duct is installed shall be constructed and fire-resistance rated as required by the International Building Code. 2. Dampers shall be prohibited in the exhaust duct. Penetrations of the shaft and ductwork shall be protected in accordance with Section , Exception Rigid metal ductwork shall be installed within the shaft to convey the exhaust. The ductwork shall be constructed of sheet steel having a minimum thickness of inch ( mm) (No. 26 gage) and in accordance with SMACNA Duct Construction Standards. 4. The ductwork within the shaft shall be designed and installed without offsets. 5. The exhaust fan motor design shall be in accordance with Section The exhaust fan motor shall be located outside of the airstream. 7. The exhaust fan shall run continuously, and shall be connected to a standby power source. 8. Exhaust fan operation shall be monitored in an approved location and shall initiate an audible or visual signal when the fan is not in operation. 9. Makeup air shall be provided for the exhaust system. 10. A cleanout opening shall be located at the base of the shaft to provide access to the duct to allow for cleaning and inspection. The finished opening shall be not less than 12 inches by 12 inches (305 mm by 305 mm). 11. Screens shall not be installed at the termination. 12. The common multistory duct system shall serve only clothes dryers and shall be independent of other exhaust systems. (Current code addresses this section through 504; standby power in item 7, item 9 and item 12 are new requirements.) Unknown 8/28/13 Draft 6

7 Item Commercial Kitchen Hood Ventilation System Ducts and Exhausts: Grease duct horizontal 2 cleanouts. Cleanouts located on horizontal sections of ducts shall (1.) be spaced not more than 20 feet (6096 mm) apart. (4.) The cleanouts shall be located on the side of the duct with the opening not less than 1.5 inches (38 mm) above the bottom of the duct, and not less than 1 inch (25 mm) below the top of the duct. (5.) The opening minimum dimensions shall be 12 inches (305 mm) on each side. Where the dimension of the side of the duct prohibit the cleanout installation prescribed herein, the openings shall be on the top of the duct or the bottom of the duct. Where located on the top pf the duct, the opening edges shall be a minimum of 1 inch (25 mm) from the edges of the duct. Where located in the bottom of the duct, cleanout openings shall be designed to provide internal damming around the opening, shall be provided with gasketing to preclude grease leakage, (3 & 6.) shall provide for drainage of grease down the duct around the dam, and shall be approved for the application. Where the dimensions of the sides, top of bottom of the duct preclude the installation of the prescribed minimum-size cleanout opening, the cleanout shall be located on the duct face that affords the largest opening dimension and shall be installed with the opening edges at the prescribed distances from the duct edges as previously set forth in this section. (2.) Be located not more than 10 feet (3048 mm) from changes in direction that are greater than 45 degrees (.79 rad). (Average cleanout cost is $ multiplied by 519 exhaust hood ACDR's equals $155,700. Based on 2011 information. Resources: CaptiveAire.) $155, Commercial Kitchen Hoods: New Section - Exhaust flow rate label. Type I hoods shall bear a label indicating the minimum exhaust flow rate in cfm per linear foot (1.55 L/s per linear meter) of hood that provides for capture and containment of the exhaust effluent for the cooking appliance duty classifications defined in this code. (Assumed label cost of $.25 for 506 ACDR's for hood systems equals $ cost. Resources: Mara Snyder, Shelly Wakefield) $ /28/13 Draft 7

8 Commercial Kitchen Hoods: Grease filters. Type I hoods shall be equipped with grease filters listed and labeled in accordance with UL 1046 and designed for the specific purpose. Grease collecting equipment shall be provided with access for cleaning. The lowest edge of a grease filter located above the cooking surface shall be not less than the height specified in Table (UL 1046 is for the filter, grease filters appear to come in a varity of styles and pricing varing between $7.00 up to $50.00 or more. The filters vary from metal mesh to metal louver systems. Very few manufactures list the acutal UL rating in their literature, but most list their items as listed and UL certified.) Energy Recovery Ventilation Systems: New Section - Recalculated air. Air conveyed within energy recovery systems shall not be considered as re-circulated air where the energy recovery ventilation system is constructed to limit cross-leakage between air streams to less than 10 percent of the total airflow design capacity. (Defines air transferred through energy recovery units to be defined as re-circulated air. The section allows the use of air to air heat exchangers which have potential of reducing the size of the central HVAC equipment in larger projects. The costs savings would extend to the operating cost for conditioned buildings using a higher quality of exhaust/relief air along with a mechanical ventilation requirement. On commercial and institutional projects with centralized HVAC equipment, the savings could average $1.00 sq.ft. in reduced sized requipment. The savings on smaller multifamily projects would be less impactful. Assumed average savings per project $40,000, affecting 200 projects in 2011, which equals $8,000, Resoures: ) UL listing issue -$8,000, /28/13 Draft 8

9 2012 Section No Exc Code Information - bold text = new text found in 2012 strike out = text deleted and not found in the 2012 Duct Systems, General: Contamination prevention. Exhaust ducts under positive pressure, chimneys, and vents shall not extend into or pass through ducts or plenums. Exception 2 : This section shall not apply to chimneys and vents that pass through plenums where such venting systems comply with one of the following requirements: 2.1 The venting system shall be listed for positive pressure applications and shall be sealed in accordance with the vent manufacture's instructions. 2.2 The venting system shall be installed such that fittings and joints between sections are not installed in the above ceiling space. 2.3 The venting system shall be installed in a conduit or enclosure with sealed joints separating the interior of the conduit or enclosure from the ceiling space. (The exception listed provides a methodology to construct pressurized exhaust ducts, vents and chimneys that pass through plenums or ducts which otherwise would be prohibited per the current code under Providing these equivalent means of compliance with code will avoid any potential cost impact that might otherwise be incurred in avoiding a pass-through. Assume an imapct on 2% on all A and B occupancy projects. A-1 12 ACDR's, A ACDR's, A ACDR's, B 2,226 ACDR's, total 3,603. 2% of 3,603 equals 73 ACDR's muliply by $8,000 equals assumed savings of $584,000. Resources: Tom Cloud, Dan Newman, Shelly Wakefield) -$584, /28/13 Draft 9

10 Materials within plenums: Combustible Electrical equipment in plenums. Combustible electrical equipment exposed within a plenum shall have a peak rate of heat release not greater than 100 kilowatts, a peak optical density not greater than 0.50 and an average optical density not greater than 0.15 when tested in accordance with UL Combustible electrical equipment shall be listed and labeled. Electrical equipment exposed within a plenum shall comply with Sections and Equipment in metallic enclosures. Electrical equipment with metallic enclosures exposed within a plenum is permitted Equipment in combustible enclosures. Electrical equipment with combustible enclosures exposed within a plenum shall be listed and labeled for such use in accordance with UL (KLT: 2043 encompasses all equipment which may be placed in a mechanical plenum space such as cameras, wiring, microphones, white noise boxes, ect. Equipment not listed and certified is available, but this could mean any piece of electrical/av equipment could be placed in the plenum. The pricing variable and available equipment is too large to identify a single fiscal impact. The listing 2043 was listed in the 2006 version and is being carried forward.) (Issue to be resolved between the two versions of the Mechanical Code, Committee to issue proposal to resolve.)(a no cost item) N Duct Construction and Installation: Supports. Ducts shall be approved with approved hangers at intervals not exceeding 10 feet (3048 mm) or by other approved duct support system designed in accordance with the International Building Code.12 feet (3658 mm) and shall be in accordance with SMACNA HVAC Duct Construction Standards - Metal and Flexible. Flexible and other factory-made ducts shall be supported in accordance with the manufacture's installation instructions. (Types of hangers do not change, SMACNA has a listing of approved hanger types and methods, assume a 100' duct run x 2, one for supply and one for return, 2006 code requires 20 hangers for 200', the proposed change would require 17 hangers, a savings of 3 hangers a project. The are 4,174 ACDR's, duct is hung in all occupancy types and in hood installations. A package of 5 hangers that are adjustable between 4 inch to 50 inch is $ ,174 projects times 3 hangers equals 12,533 hangers. 12,533 hangers divided by 5 per package equals 2,510 packages at $8.27 equals $20,762 in savings. Resources: -$20, /28/13 Draft 10

11 Cooling Towers, Evaporative Condensers and Fluid Coolers: General. A cooling tower used in conjunction with an air-conditioning appliance shall be installed in accordance with the manufacturer's installation instructions. Factory-built cooling towers shall be listed in accordance with UL (current code section 903.2) (Evapco, a large scale provider for cooling towers, say that in their towers the UL 1995 listing is for the electrical components within the cooling tower, the towers are not listed. Availability of listed cooling towers is an issue)(nfpa 90A and 90B not adopted Indiana code. Resourcs: Evacop, China Ice not listed) Refrigerant Piping: New Section - Piping in concrete floors. Refrigerant piping installed in concrete floors shall be encased in pipe ducts. The piping shall be isolated and supported to prevent damaging vibration, stress and corrosion. (Edwards Mechanical) UL listing issue Unknown Total -$9,327, /28/13 Draft 11

Advanced Ventilation for Residential applications FBC Res 2010.

Advanced Ventilation for Residential applications FBC Res 2010. Course Description Review of the Residential Ventilation requirements in the Florida Building Code, Residential 2010. I. Introduction Dean