Type iv duct wrap. 615+, applied directly to a grease duct per the two-layer Telescoping wrap technique. To minimize waste, 3M™ Fire Barrier Duct Wrap 615+ material should be rolled out tautly prior to measuring. Maximum area of duct is 1.49 m2 (2304 in.2) and maximum size of 1220 mm (48 in.) by 1220 mm (48 in.). First Layer The first layer of 3M™ Fire ...

Faced Duct Wrap Insulation complies with the property requirements of the following specifications: • U.S. Federal Specification HH-I-558 B, Form B, Type 1, Class 6, • ASTM C 553 • DCL ASTM - C 533 - C 547 - C 612 - C 665 • CE-EN 13162 Fire Properties B.S. 476 PART 4 - Non Combustible

Reflectix HVBP48100, 48" x 100', Bubble Wrap. Cat #: X2899. Model/Part #: HVBP48100. Sign in for pricing and availability. Add To Cart. Shop duct wrap at LennoxPros.com.Scammers are still promoting this worthless R-1 product as insulation. The label of this roll of bubble wrap includes several R-values, ranging from R-6.1 to R-21. In fact, the product has an R-value of R-1.1. The touted R-values aren't product R-values—they're assembly R-values. By blurring the line between product R-values and assembly R ...

Duct Wrap Insulation. When specifying HVAC insulation, your goal is to reduce heat transfer. Fiberglass duct wrap insulation can help you accomplish this in a properly designed and installed system. It can improve thermal performance and help control condensation in commercial and residential HVAC systems. In addition, duct wrap insulation is ...Microlite Standard Duct Wrap is a lightweight, highly resilient, blanket-type thermal and acoustical insulation made from flame-attenuated glass fibers bonded with a thermosetting phenolic resin.PSK Duct Wrap Seaming Tape is designed to provide a vapor barrier seal on JM’s White & Black PSK-faced Microlite duct insulations. We offer a range of fiberglass duct wrap solutions that provide traditional sheet metal ducts with improved thermal insulation. Installing contractors prefer it for its improved handling, easier cutting and less dust.Type I; Type 75 Duct Wrap Type II; Type 100 & 150 Duct Wrap Type III; Type 150 Duct Wrap – CAN/CGSB-51.11-92 – ASTM C1136 FSK and white PSK, Type II Gray PSK, Type IV • Fire Safety Standards: – NFPA 90A, NFPA 90B Fire Resistance: • Fire Hazard Classification: – UL 723, ASTM E84, NFPA 255, CAN/ULC-S102-M88 Max. Flame …Summary. Microlite® FSK Formaldehyde-free™ duct wrap offers superior thermal performance and condensation control in a lightweight, blanket-type insulation with an FSK facing. It is recommended for HVAC system exteriors or surfaces where design parameters prohibit the use of liner or board. Installing contractors prefer Microlite's binder ...DuctWrap. DuctWrap is a lightweight and flexible insulation roll faced with reinforced aluminium foil. DuctWrap is ideal for both circular and rectangular ductwork. This solution is recommended for service temperatures of up to 230˚C. The thermal insulation solutions are often applied to air conditioning, warm air and extractor ducts, located ...DuctWrap. DuctWrap is a lightweight and flexible insulation roll faced with reinforced aluminium foil. DuctWrap is ideal for both circular and rectangular ductwork. This solution is recommended for service temperatures of up to 230˚C. The thermal insulation solutions are often applied to air conditioning, warm air and extractor ducts, located ...NetLag will drop ship to your project site in 54” x 30’ rolls. Each roll will weight in excess of 140 pounds. The rolls will ship via common carrier shrunk wrap on a pallet. For questions related to your shipment, please call our help desk at 1-800-638-9355. Acoustic lagging designed to wrap around pipes and ductwork to combat noise bleed.

Type I, Unfaced Type III, FSK & PSK – White – ASTM C553 Type I, Type 75 Duct Wrap Type II, Type 100 & 150 Duct Wrap Type III, Type 150 Duct Wrap – CAN/CGSB-51.11-92 – ASTM C1136: FSK & White PSK, Type II, Type IV • Fire Safety Standards: – NFPA 90A, NFPA 90B Fire Resistance • Fire Hazard Classification:Fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating, ventilating, and air-conditioning ducts and plenums operating at temperatures between 40˚F (4˚C) and 250˚F (121˚C). Duct wrap insulation reduces heat loss or gain through duct walls, conserving energy3 x 48 x 50' Duct Wrap, Type #75, 3/4# Density: INSULATION : R-8: ITEM BRAND NAME : SOFTR: Inclusions Features : Improved Handling, Easier Cutting and Less Dust: Insulation Thickness : 3 Inch: Item Id : DUCTWRAP3: MAIN FILTER : Duct Wrap, Liner, & Insulation: MANUFACTURER DISPLAY/LOGO NAME : Johns Manville;Owens Corning: MANUFACTURER NAME ...

Type I, Type II Type 75 & 100 Type I, Type II, Type III Type 150 *For faced material: 250°F (121°C) maximum temperature. ASTM C1136s† Type II FSK Facing †Replaces HH-B-100B, Type II. Canada: CGSB 51-GP-11M NYC MEA 40-75-M 25 50 HVAC INSULATION MICROLITE® FSK FSK-FACED FORMALDEHYDE-FREE TM FIBERGLASS DUCT …

FastWrap XLS is tested and listed for both Duct A and Duct B applications. In addition, FireMaster FastWrap XLS is also Intertek listed at 1.25” thickness (32 mm) for these same 2-hour ventilation duct (Duct A) applications, providing a 40% weight reduction over competitive 2-hour systems.

EcoFoil R8 HVAC Duct Wrap Insulation is very durable, yet clean, lightweight, and flexible. It is easy to install and safe to handle with no special clothing or breathing equipment. Install spacer strips (included) around your duct to provide an air gap. Next, wrap the HVAC bubble wrap around your duct, using EcoFoil Premium HVAC tape to seal ...Is your A/C System in need of repair or service? Get connected with the best heating and air conditioning contractors in your area.Fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating, ventilating, and air-conditioning ducts and plenums operating at temperatures between 40˚F (4˚C) and 250˚F (121˚C). Duct wrap insulation reduces heat loss or gain through duct walls, conserving energyMicrolite White PSK Duct Wrap. Formaldehyde-free™ duct wrap offers superior thermal performance and condensation control in a lightweight, blanket-type insulation with a white PSK facing. It is recommended for HVAC system exteriors or surfaces where design parameters prohibit the use of liner or board. Installing contractors prefer Microlite ...Uses. SOFTR® Duct Wrap FRK is used for external insulation of commercial and residential heating, air conditioning and dual-temperature ducts operating at temperatures from 40°F (4°C) to 250°F (121°C). This insulation, when applied in accordance with installation instructions, will provide the “installed R-value” as published for the ...

SOFTR® Duct Wrap shall be cut to "stretch-out" dimensions and 2" (50mm) piece of duct wrap removed from the facing at the end of the piece of duct wrap to form an overlapping staple and tape flap. Install duct wrap tightly butted with facing outside. Seams shall be stapled approximately 6" (150mm) on center with outward clinching staples.24 in. x 25 ft. Fire Barrier Duct Wrap 615. Questions & Answers. +4. Hover Image to Zoom. $310.00 /case. Save up to $100 on your qualifying purchase. Apply for a Home Depot Consumer Card. Non-asbestos wrap. Ideal for duct enclosure systems.Microlite® White PSK Formaldehyde-free™ duct wrap offers superior thermal performance and condensation control in a lightweight, blanket-type insulation with a white PSK facing. It is recommended for HVAC system exteriors or surfaces where design parameters prohibit the use of liner or board. Installing contractors prefer Microlite's binder for many reasons, including improved handling ...25 PSI Flat Extruded Insul (Type IV) 40 PSI Flat Extruded Insul (Type VI) 60 PSI Flat Extruded Insul (Type VII) 100 PSI Flat Extruded Insul (Type V) Fan Fold Extruded Insulation ; Extruded Taper & Flat - Misc Products; Polyisocyanurate Insulation. Polyisocyanurate Insulation. 20 PSI Flat Isocyanurate Roof Insulation; 25 PSI Flat …Type I – Fiberglas™ Duct Wrap Type 75; Type II – SOFTR ® Duct Wrap FRK Types 100 and 150. (Operating temperatures to 250°F (121°C) and thermal values to 150°F (66°C) mean.) 1 Preferred specification is ASTM Type 75C1290. SOFTR® Duct Wrap is a blanket of glass fiber insulation factory-laminated to FRK vapor retarder facing.Duct Wrap & Insulation Explore our vast collection of duct wraps and insulation from the best brands on the market at Southern Pipe & Supply. Used as thermal insulation on heating and air-conditioning ductwork, our selection of duct wrap is designed to improve thermal insulation both residential and commercial HVAC systems.3MU/FRD 120-15 How to Install Duct Wrap on Air Duct Using Telescope Method with 615+48" x 50' x 3" Duct Wrap Type 75; 48" x 50' x 3" Duct Wrap Type 75. Skip to the end of the images gallery. Skip to the beginning of the images gallery. SKU. 48503. Brand: Certainteed Insulation Group. Add to List. Login to add this product on shopping list. 3" Type 75 Duct Wrap has an Installed R-Value of R-8.3.The Master Flow 4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket is used in standard Heating and Air Conditioning (HVAC) systems and some venting applications. The duct has R6 insulation which contains 33% more insulation than the standard R4.2 product. This additional insulation provides greater thermal efficiency to save energy. The product is also covered in a heavy duty, silver ...Master Flow. (151) Questions & Answers (71) R-6 insulation. Helps air duct system maintain a consistent air temperature. Easy installation for new and existing ductwork. View Full Product Details. Read page 1 of our customer reviews for more information on the Master Flow 60 sq. ft. R-6 Insulated Duct Wrap.soft aluminium foil self-adhesive tape (Idenden type T303, or similar and approved) to maintain a continuous vapour barrier. The final surface treatment is to be as diagram opposite. Note: The pins and washers are necessary to avoid sagging of the insulation, particularly on larger size ducts and on the undersides of ducts. Fixing centres will …Uses: Fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating, ventilating, and air-conditioning ducts and plenums operating at temperatures between 40 ̊F (4 ̊C) and 250 ̊F (121 ̊C).: Get the latest IVE stock price and detailed information including news, historical charts and realtime prices. Indices Commodities Currencies StocksDuct Wrap 615+ is tested to ISO 6944 Type A and can be used on stair pressurization ducts and other life safety air ducts, providing 2 hour protection with a 1 layer system. 615+ 2hr Fire Protection Grease and Ventilation Air Duct Wrap. 3 Codes and Standards for 615+, Air Duct*The duct tape's popularity is due to one primary factor: its strong adhesive. You can use it to attach anything to any surface. Moreover, it is far more Expert Advice On Improving ...Barrier Duct Wrap 615+ Page 1 of 6 . Technical Data Sheet May / 2019 Product Description 3M™ Fire Barrier Duct Wrap 615+ is a flexible fire-resistant wrap consisting of an inorganic fiber blanket encapsulated with a scrim -reinforced foil. The product is 1 -1/2 in. thick, 6pcf density1. It is used to fire rate commercial kitchen grease ducts ...It is a proven alternative to 1- and 2-hour fire resistant shaft enclosures for grease ducts. 3M™ Fire Barrier Duct Wrap 615+ performs in temperatures up to 2192F/1200C.3M™ Fire Barrier Duct Wrap 615+ is the only fire-rated duct wrap product you#39;ll ever need to help protect both grease ducts and air ducts while passing the necessary fire ...Duct Wrap (10) Duct Board (5) Facings (6) Energy codes (4) When insulating ducts, understanding the meaning and impact of R-Values and insulation thicknesses is essential to getting the most efficient, affordable outcome on your heating installation project. The ratings provide a guide for homeowners that determines the effectiveness of the ...

Uses. SOFTR® Duct Wrap FRK is used for external insulation of commercial and residential heating, air conditioning and dual-temperature ducts operating at temperatures from 40°F (4°C) to 250°F (121°C). This insulation, when applied in accordance with installation instructions, will provide the "installed R-value" as published for the ...Duct Wrap, Overall Width 48 in, Overall Length 25 ft, Thickness 1 1/2 in, Material Fiberglass, Jacket Material Foil Scrim Kraft, Insulation Value 4.2, Insulation Density 0.75 lb, Product Type Duct Insulation, Color Silver, Maximum Temperature Rating 250 Degrees F, Minimum Temperature Rating -32 Degrees F, Standards ASTM C-1104, ASTM C-1338 ...CertainTeed SoftTouch™ Duct Wrap is a remarkable HVAC ductwork insulation and protection solution. Crafted with an innovative formula, it outperforms traditional materials in several key aspects. Firstly, it excels in thermal insulation, substantially reducing heat loss and gain. This translates to significant energy savings and enhanced ...Reflectix® HVAC Big Bubble 4' X 75' Foil Duct Wrap Insulation - R-4.2 HVBB48075 - HVAC Big Bubble 4' X 75' Foil Duct Wrap Insulation - R-4.2 | Gemaire Distributors The store will not work correctly in the case when cookies are disabled.Covers up to 60 sq. ft. of duct surface - measures 2 ft. X 30 ft. R-8 value meets or exceeds most energy codes and helps reduce energy costs. Improves duct system's air temperature consistency, reduces condensation and absorbs draft and system operation noise for improved duct system efficiency. Return Policy.In this type of application, a material with a good STC rating (such as a closed cell insulation or a mass loaded elastomer or vinyl) can reduce the noise to acceptable levels. But unlike sound absorption, where the duct is lined, sound transmission can be controlled through the use of duct lining or duct wrap. Looking at Indoor Air QualityDuct Wrap 615+ is tested to ISO 6944 Type A and can be used on stair pressurization ducts and other life safety air ducts, providing 2 hour protection with a 1 layer system. 615+ 2hr Fire Protection Grease and Ventilation Air Duct Wrap. 3 Codes and Standards for 615+, Air Duct*

Depending on the HVAC system and the type of insulation used, it is estimated that insulated HVAC ductwork can last anywhere from 10 to 30 years before needing to be replaced or repaired. Insulapack is a leading manufaturer of HVAC duct insulation wrap with higher quality and better-insulating.the duct operating and ambient conditions. Specification Compliance ASTM C 553★ Type II Type 75, 100 & 150 Type III Type 150 ★ Replaces HH-I-558B, Form B, Type I, Class 6. ASTM C 1290 Type 75, 100 & 150 ASTM C 1139† Type II Grade 1 Type 75 Faced Grade 2 Type 100 Faced Grade 3 Type 150 Faced †Replaces MIL-I-22023D. ASTM E 84 FHC 25/50 ...Type I – Fiberglas™ Duct Wrap Type 75; Type II – SOFTR ® Duct Wrap FRK Types 100 and 150. (Operating temperatures to 250°F (121°C) and thermal values to 150°F (66°C) mean.) 1 Preferred specification is ASTM Type 75C1290. SOFTR® Duct Wrap is a blanket of glass fiber insulation factory-laminated to FRK vapor retarder …R value: R8.3. Thickness: 2-1/4 in. Width: 48 in. 0. Shop for Fiberglass 48 in. x 50 ft. Duct Wrap from Owens Corning Fiberglass At Ferguson. Ferguson is the #1 US plumbing supply company and a top distributor of HVAC parts, waterworks supplies, and MRO products.Here are the common types of HVAC insulation and their primary benefits: Duct Liner: Used to line sheet metal ducts when both thermal and acoustical performance is desired. Duct Board: Fabricated into the duct itself, duct board offers both sound and thermal control. Duct Wrap: Thermal insulation installed on the outside of sheet metal ductwork ...4. TECHNICAL DATA Applicable Standards: •฀฀Model฀Building฀Codes:฀ - ICC •฀฀Material฀Standards: -฀ASTM฀C1290 -฀ASTM฀C553 Type I; Type 75 Duct Wrap Type II; Type 100 & 150 Duct Wrap Type III; Type 150 Duct Wrap - CAN/CGSB-51.11-92 ฀ -฀฀ASTM฀C1136 •฀฀Fire฀Safety฀Standards: - NFPA 90A, NFPA 90BOrder Reflectix Reflectix Spiral Duct Wrap DW1202504, DW1202504 at Zoro.com. Great prices & free shipping on orders over $50 when you sign in or sign up for an account.The duct tape's popularity is due to one primary factor: its strong adhesive. You can use it to attach anything to any surface. Moreover, it is far more Expert Advice On Improving ...Length. 49. Width. 21.646. Country of Origin. USA. SOFTR® duct wrap is a blanket of glass fiber insulation factory laminated to FRK vapor retarder facing. A 2" (50mm) stapling and taping flange is provided on one edge. This product is designed to meet existing performance standards such as NFPA 90A and 90.Wrap the insulation around the duct, and then pinch the seam closed. Secure the insulation with short strips of foil tape. Apply a long strip of foil tape along the seam in the insulation. Repeat to insulate the remaining ducts. To install preformed duct insulation, start by disconnecting an elbow to expose the end of the duct.Covers up to 60 sq. ft. of duct surface - measures 2 ft. X 30 ft. R-8 value meets or exceeds most energy codes and helps reduce energy costs. Improves duct system's air temperature consistency, reduces condensation and absorbs draft and system operation noise for improved duct system efficiency. Return Policy.This revolutionary product answers the demand for a fiber-free elastomeric duct liner for spiral ducts, considered to be the most efficient ducts made. An easy-to-cut, flexible olefin backing is pre-laminated to the foam and shipped in convenient rolls.FyreWrap 1.5 Duct Insulation offers the following product features: High-temperature, biosoluble insulation. Zero clearance to combustibles. 1- and 2-hour fire endurance rating. Lightweight, flexible product form. Easy to cut, fabricate and install around ducts. Scrim encapsulated for durability and resistance to grease absorption.The Reflectix® Spiral Duct Insulation consists of 2 highly reflective layers of film (94%+ reflectivity). Two inner layers of insulating bubbles resist conductive heat flow while a center layer of polyethylene provides our product with high reliability and strength (nominal thickness 5/16 of an inch). Reflectix® Insulation is an ideal alternative to other types of fibrous insulation products ...Duct wrap, or ductwork insulation, is a cost-effective way to improve your home’s energy efficiency without replacing a functioning furnace or AC unit. For households looking for smart ways to lessen their environmental impact and lower their energy bill, ductwork insulation is an accessible and effective HVAC system upgrade.AES R-8 HVAC Duct Wrap Insulation Reflective 2 Sided Foam Core 4' x 50' (200 Sq Ft) Brand: AES. 4.4 148 ratings. $14444. FREE Returns. Duct insulation increases the energy efficiency of your HVAC system, saving you money. Roll is 48"W x 50' Long (200 sq ft) Double Sided Reflective 1/4 thick foam core. Class 1 Class A ASTM Fire Rating.Properly wrapped, fresh pork will last between three to six months in the freezer, depending on the type of pork it is. Ground pork will last up to three months in the freezer befo...3MU/FRD 120-15 How to Install Duct Wrap on Air Duct Using Telescope Method with 615+

PSK Duct Wrap Seaming Tape is designed to provide a vapor barrier seal on JM’s White & Black PSK-faced Microlite duct insulations. We offer a range of fiberglass duct wrap solutions that provide traditional sheet metal ducts with improved thermal insulation. Installing contractors prefer it for its improved handling, easier cutting and less dust.

3/4 lb. density fiberglass with FSK Foil facing. Temperature limit = 250F degrees. Fiberglass blankets have both thermal and acoustical properties, and can be used for HVAC and sound control. UL-Validated Formaldehyde free Earthwool insulation made with ECOSE technology. Made with a minimum of 50% recycled content.

Fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating, ventilating, and air-conditioning ducts and plenums operating at temperatures between 40˚F (4˚C) and 250˚F (121˚C). Duct wrap insulation reduces heat loss or gain through duct walls, conserving energyObject moved to here.506.3.11 Grease Duct Enclosures. A commercial kitchen grease duct serving a Type I hood that penetrates a ceiling, wall, floor or any concealed space shall be enclosed from the point of penetration to the outlet terminal. In-line exhaust fans not located outdoors shall be enclosed as required for grease ducts.Pay $55.97 after $25 OFF your total qualifying purchase upon opening a new card. Apply for a Home Depot Consumer Card. R-6 insulation. Helps air duct system maintain a consistent air temperature. Easy installation for new and existing ductwork. View More Details. Unavailable at Moses Lake. Delivering to. 98837.3M Aluminum Foil Tape 3340, 2.5" x 50 yd, 4.0 mil, Silver, HVAC, Sealing and Patching Hot and Cold Air Ducts, Fiberglass Duct Board, Insulation, Metal Repair. 4.7 out of 5 stars ... COSIMIXO Silver Aluminum Foil Duct Tape 4.0mil x 2 Inches x 70Yards,Heavy Duty,High Temperature Sealing and Patching,Perfect for HVAC,Air Ducts,Foamboard,Metal ...Johns ManvilleUse our Unifrax Fyrewrap Elite 1.5 to wrap fire-rated grease ducts and hazardous exhaust ducts. This duct insulation wrap offers a slim, lightweight design.Type I, Unfaced Type III, FSK & PSK - White - ASTM C553 Type I, Type 75 Duct Wrap T ype II, Type 100 & 150 Duct Wrap Type III, Type 150 Duct Wrap - ASTM C1136: FSK & White PSK Type II, Type IV Fire Safety Standards: - NFPA 90A, NFPA 90B FIRE RESISTANCE Fire Hazard Classifi cation: - UL 723, ASTM E84, CAN/ULC-S102 Max. Flame Spread ...

sks zn ba asbtarjetas de buenas noches para whatsapp gratis en espanol gratistwitter bahar candan ifsafylm sks lzbyn Type iv duct wrap sks khwahr wbradr [email protected] & Mobile Support 1-888-750-4393 Domestic Sales 1-800-221-3360 International Sales 1-800-241-6292 Packages 1-800-800-9178 Representatives 1-800-323-7354 Assistance 1-404-209-3645. Nov 7, 2022 ... ... 4" driver Tape Measure As an Amazon Associate I earn from qualifying purchases ... Insulating round pipe elbows using fiberglass ductwrap ( .... swpr ayran Knauf Insulation External Duct wrap (faced) with ECOSE® Technology is used as external insulation on commercial or residential heating or air conditioning ducts. It is suitable for the exterior of rectangular or round sheet metal ducts and spaces or surfaces where temperature and condensation must be controlled. Knauf Insulation External Duct wrap (faced) is made using up to 80% recycled ...Type II, Type 100 & 150 Duct Wrap Type III, Type 150 Duct Wrap - CAN/CGSB-51.11-92 - ASTM C1136: FSK & White PSK, Type II, Gray PSK, Type IV • Fire Safety Standards: - NFPA 90A, NFPA 90B Fire Resistance • Fire Hazard Classification: - UL 723, ASTM E84, CAN/ULC-S102 Max. Flame Spread Index: 25 cars with the boom lfylm sks hywan ba ansan Fiberglass duct wrap is a thermal and acoustical insulation blanket that is used as external insulation on commercial HVAC ducts. Fiberglass insulation is a cost-effective and energy-efficient insulation that provides moisture and fire resistance while also dampening sound. Fiberglass duct wrap can be used for exterior sheet metal ducts where ... sksy bkn bknluxe nails and spa seabrook nh New Customers Can Take an Extra 30% off. There are a wide variety of options. FRK Duct Wrap Insulation is ideal for cooling, heating or dual temperature service ducts. Duct Wrap insulation is 1-1/2" thick fiberglass blanket with FSK (Re-inforced Foil, aka FRK) laminate facing. It has a 3/4# density and an out of package R-Value of 5.1. Product Dimensions. Thickness: 1-1/2"Type I, Unfaced Type III, FSK & PSK - White - ASTM C553 Type I, Type 75 Duct Wrap T ype II, Type 100 & 150 Duct Wrap Type III, Type 150 Duct Wrap - ASTM C1136: FSK & White PSK Type II, Type IV Fire Safety Standards: - NFPA 90A, NFPA 90B FIRE RESISTANCE Fire Hazard Classifi cation: - UL 723, ASTM E84, CAN/ULC-S102 Max. Flame Spread ...Buy 4 - 7 and pay only $235.00 each. Buy 8 or above and pay only $220.00 each. Quantity: Description. Other Details. Reviews. Unifrax FyreWrap ELITE 1.5 Duct Insulation Wrap is a flexible enclosure for 1- and 2-hour fire-rated commercial kitchen grease ducts (range hoods) and hazardous exhaust ducts including chemical fume ducts.