Above: Table 503 adapted from the U.S. model code as adopted by colorado (2018) illustrates that the clearance distances for a direct vented gas appliance may need to be adjusted for the input BTUH of the appliance. In direct vent applications, this clearance distance must be in compliance with local building codes, the requirements of the fuel gas supplier for the heating … 6 inches (15 cm) 50,000 Btuh (15 kw), 12 inches (30 cm) for appliances > 50,000 Btuh (15 kw). I'm considering the situation in which the hot gas exhaust blows onto the air intake side of a condensing coil. Flue-gas temperature affects vent operation because the hotter the gases are, the lighter they are. after the gas would come on and ignite, it would shut off. Called roofer, he re-caulked the storm cap and all around shingles touching the vent. Gas heater vent clearances are given above on this page; and of course the IO manual for your specific tankless water heater brand and model will have specific clearances that the manufacturer has determined must be respected for that very heater - those may differ from what we show here. It may indeed be possible to convert your heating equipment to direct vent through sidewall. Apologies for the delay. The fuel being used for your heaters, and other more basic details such as clearance from combustibles of course will be considerations in exactly what's needed. If your water heater is only venting, that is it's not a condensing heater that also has a combustion air intake, then grill exhaust isn't an issue for the heater and we move on to item 2 below. Compare. I don't understand the whole situation, Tony but a good place to start is with the brand and model of your gas fireplace. Code writers can't predict every possible construction configuration nor every mistake I alone have made in 50 years of construction work, inspection, and repair; so they try to write in terms of objectives. Where I've seen this obstruction before the deck builder usually frames a rectangle around the vent to keep the deck framing away from the vent. Vent number 1 in the image is for the furnace (2 is the water heater and 3 is sump). in AMERICAN STANDARD GAS FURNACE INSTALLATION MANUAL [PDF] (2008), American Standard Heating & Air Conditioning, that in turn cites: In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code. Ir removal and sidewall conversion possible, with existing equipment? Minimum distance horizontally from the meter or vertically?Thanks»! Experience. Your recently viewed items and featured recommendations, Select the department you want to search in, RV Heating, Ventilation & Air Conditioning, Price and other details may vary based on size and color. Long Sweep elbows should be considered equivalent to one 90 deg. @Denny,No Denny, using one pvc vent termination for two appliances is not permissible. These PVC or CPVC pipes can be inviting to rodents and birds (especially in the winter) as well as insects (mostly in summer) looking for a home. A wind or rain cap creates a partial barrier to the wind so its effects are lessened. So in effect even if a requirement for protection a soffit from exhaust gases appeared ONLY in manufacturers' literature, it's included in and is "code" by that requirement. The vent termination of a direct vent application must terminate at least 12 inches from any opening through which flue gases may enter a building (door, window, or gravity air inlet). Bottom line: you're right that there are few model building code citations about clearance distance from gas heating appliance direct vent termination and a building soffit. the roof within 12 feet. Does this apply to an inside the house mechanical (systems) air supply exhaust inlet which is part of an Energy Recovery Ventilator System ERV ? RKURCK RV Furnace Vent Cover, Flying Insect Screen net Cover, Heater Exhaust Vents Screen 2.8 inch Stainless Steel Mesh for RV Camper 2 Pack - Installation Tool Included 4.8 out of 5 stars 31 $9.99 $ 9 . We have no relationship with advertisers, products, or services discussed at this website. A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwelling and serves both dwellings. 9 Cliff help me out if I've misunderstood, but it seems to me that B-vent clearance requirements or gas heater vent clearance requirements that specify distance to nearest combustible are based on possible temperatures involved and thus on the input BTUh of the equipment. Phone: 802.863.4511. 2630 Airport Road Most residential furnace manufacturers offer 4 cabinet width options being A, B, C, and D widths. $15.20 $ 15. [4] Tjernlund Draft Controls, A Series (single action for oil, solid fuel, and fan-assisted gas burners) and B Series (double action for gas heating appliances), web search 04/02/1011, original source: http://www.tjernlund.com/Tjernlund_8500490.pdf , Tjernlund Products, Inc., 1601 Ninth Street, White Bear Lake MN 55110-6794, Tel: 651-426-2993 or 800-255-4208 website: www.tjernlund.com Email: Tjernlund Corporation also provides a Sidewall Venting sizing tool for oil fired heating equipment (www.tjernlund.com/Sizing/Oil.htm) and a separate tool for gas fired heating equipment (www.tjernlund.com/Sizing/gas.htm). or exhaust? The illustration below showing a minimum of 12" clearance of gas vent to roof overhang is from ICP's gas furnace installation instructions, not-accidentally included in the employee training materials for some gas companies such as Questar (our source). Page top Illustration adapted from Thermo Products installation instructions - click to enlarge this or any other image or photo at InspectAPedia. Whether the furnace is a standard (a conventional furnace 50-70%), mid-efficiency (70-80%) or a high-efficiency furnace, the provision for combustion air and flue gas vent systems is very important. Rural Oregon location. If your concern is for heater exhaust affecting the grill operation, we have no expert data on that concern and it's less likely to be a worry but the same 3 ft. arbitrary guess may be sufficient. Joe Get it as soon as Fri, Jan 15. 2 elbows, 90 ft., Both were purchased 7.5 years ago. Exception: This shall not apply to vent terminals that are 2 feet (610 mm) or more above or 25 feet (7620 mm) or more below operable openings. Adjustable Versa Cap is recommended to be used with flue, hot stack or B-vent installations. If you violate these the system may not vent properly and it could be unsafe. There's a problem loading this menu right now. 6 Inch Round Gas Vent Collection ; Fuel Type: Gas ; Pipe Inside Diameter: 6 ; $22.58. Kevin there's more than one answer - for example are there windows in your home's wall that would make the vent violate that detail?See all of the vent clearances in the article above. This is the author's OPINION based on other clearance distances and standards discussed in the article above. One 90° elbow should be secured to the combustion air intake connection. Model: W2-2404. But. 100,000 Btuh (30 kw), 36 inches (91 cm) for appliances > 100,000 Btuh (30 kw). of TYPE B-VENT CHIMNEYS. The back is about 20' from installation point of heater. Is that too tall to do this? The constant exposure to weather weakens a gas furnace roof vent's outer liner and termination cap. Rain entering potentially damages unit. In GENERAL and excerpting from Goodman's GMVC96 Installation and Operation Manual. In the Goodman heater manual I use as an example (Watch out: you didn't give your heater model so this our excerpt may not be correct nor safe for you), and using a 60,000 BTUH Goodman MVC96/CVC96 Direct Vent (2 - Pipe) system, the maximum allowable length FOR THAT BTUh example depends on. 3.b. The final authority is your local building inspector; The NFGC Recommended Clearance Distance Table for a Direct Vent Gas Appliance shows a requirement K for "Distance to a mechanical (systems) air supply inlet as 6 feet and 3 feet above if within 10 feet horizontally". Can I leave the B vent going up the outside of the house in the open or does it have to be enclosed in a chase? The windows above are opened occasionally. While 3 feet may be adequate for some installations, depending on site specifics of buildings, trees, wind, terrain, etc. You’re seeing this ad based on the product’s relevance to your search query. Thank you VERY much in advance for your thoughts!! The only NFPA54 rule similar to your table is in 2021 version NFPA 54 Table 12.9.1 which states NO LIMIT to vented or unvented soffit. The inner liner carries the furnace's exhaust fumes outside, and the outer liner insulates and protects the inner liner. Our houses are fairly close together and I measured 9 1/2’ between my proposed sidewall vent position and our neighbor’s home. [3] "Instructions for Installing FIELD Type AF Barometric Draft Controls," Form No. Is that for intake? The front is closest to where heater will be installed. for a gas fireplace exhaust termination cap, 3 feet (91cm) above - if within 10 feet (3m) horizontally. Thanks that's an interesting question; After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Thank you. Or see GAS APPLIANCE DIRECT VENT CLEARANCE FAQs - questions & answers posted originally on this page. It won't be inspected but I'd like it done "correctly." I would start by checking with the manufacturer of the equipment. Gas Furnaces, TEMPSTAR CONDENSING GAS FURNACE INSTALLATION INSTRUCTIONS, Thermopride HIGH-EFFICIENCY UPFLOW FURNACE INSTALLER'S INFORMATION MANUAL, SIDE WALL VENTING PRODUCTS REFERENCE GUIDE, Weil McLain ULTRA GAS FIRED WATER BOILERS MANUAL ADDENDUM: VENTING, GOODMAN TWO STAGE GAS FURNACE CV96 & MVC96, CONDENSING GAS FURNACE INSPECTION & TESTS, Carrier Model BW9 Gas-Fired Condensing Boiler, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES, 12 inches [Note 2] or 6 to 36 inches depending on BTUH, At least 3 feet (0.9 m) above any forced air inlet located within 10 feet (3.1 m). Galvanized steel construction can provide strength and durability. -- What's my best options?? Master Flow vent caps are used to cap pipes extending through the roof. Category IV Direct Venting Intake and Exhaust Pipes 26. Can I install the deck next to the side of it? 31 DC 30666, Field Corporation, Mendota, IL 61342, web search 04/02/2011, original source: http://www.fieldcontrols.com/pdfs/04592700.pdf, Field Controls, Kingston, North Carolina 28501, Tel: 919-522-3031. In direct vent applications, this clearance distance must be in compliance with local building codes, the requirements of the fuel gas supplier for the heating appliance in use, and the appliance manufacturer's instructions. We welcome your further photos, comments, questions. Also see CLEARANCE DISTANCE, HVAC. For help finding the manufacturer of your gas fired equipment see these two links offering both equipment installation and operating manuals and age decoding help: This topic has moved to DIRECT VENT INSTALLATION, SNAFUS & SPECS, I have a Goodman 60,000 BTU high efficiency Direct venting, my fresh air vent is about 3 feet below the window, my exhaust vent I want to move just right around the corner of the house approximately a total distance of about 48 inches, can I do this if not how far to the right of the window and below the window can I be with The exhaust vent thank you, This question and reply were posted originally at DIRECT VENTS / SIDE WALL VENTS. Isn't "exhaust" - "exhaust"?? Is this considered an inside corner issue, which means I need 3 feet clearance from the side of the deck? Am I able to include this 5" with 31" for the total vertical separation of 3 feet to the bottom edge of the direct vent heater port? The next move should be to call the gas company right away. Are the INtake and EXhaust subject to the exact same clearances from windows, other vents, etc.? Where you will find a table of all of the required minimum clearance distances from the vent outlet (or a vent intake) and other building features like windows and doors. Metal-Fab Type B Gas Vent combines hemmed flues and casings that maximize product durability and reliability and minimize installation time. Raven R1508 2 inch PVC Termination Vent with Stainless Steel Screen, 2", Diversitech - HVENT2 2-Inch Horizontal Vent Termination Kit, 9.65" x 2.9" x 13.45" (HVENT-2), Accord AMAGCOV815 Magnetic Vent Cover, 8-Inch x 15-Inch, 3-Pack, Camco RV Vent Insulator And Skylight Cover with Reflective Surface, Fits Standard 14" RV Vents (45192), Halotronics RV Refrigerator/Furnace Vent Covers/Bug Screens for Duo-Therm and Suburban (Pack of 2), Camco 42140 Flying Insect Screen - FUR 100, ABN RV Furnace/Water Heater/Battery Vent Cover & Install Tool, 4.5 x 4.5 x 1.3in Camper Trailer Bug Insect Screen, Camco Flying Insect Screen -Protects RV Furnaces From Insects and Prevents RV Vent Damage - (2 Pack) (42141),2.9" Diameter X 1.3", RKURCK RV Furnace Vent Cover, Flying Insect Screen net Cover, Heater Exhaust Vents Screen 2.8 inch Stainless Steel Mesh for RV Camper 2 Pack - Installation Tool Included. 2. Model: W2-8804. You will see in the installation manual for a typical direct vent gas fireplace that the vent like this quite short and run horizontally out through a wall. for appliances =/< 10,000 Btuh (3 kw). The top of the vent is currently 4 inches below the vinyl siding. Top subscription boxes – right to your door, © 1996-2020, Amazon.com, Inc. or its affiliates. For example, some exhaust vents exit a home and an elbow is used to locate the vent higher than the intake pipe and then yet another hub is used to direct the exhaust away from the home. DuraVent 4" Inner Diameter - FasNSeal AL29-4C Special Gas Vent Pipe - Double Wall - Wide Mouth Boot Tee. The back is about 20 feet away. Mid-efficiency furnaces have an AFUE (Annual Fuel Utilization Efficiency) of 80%, and high-efficiency furnaces have an AFUE of 90-98% . for a gas fireplace exhaust termination cap, 3 feet (91cm) above - if within 10 feet (3m) horizontally. [15]. I went and checked out. Bill:Which concern is in your question:1. grill smoke and exhaust entering the combustion air intake for the water heater? Kinston, NC 28504 Hopefully - my question is being "moderated" and then will appear? Good luck Denny and keep it safe. A rusted area on a vent pipe not only lets rainwater enter the attic but also allows potentially dangerous downdrafts to push fumes into the home's living space. Provide protection against rain, snow and … for appliances > 10,000 Btuh (3 kw) From there is a straight and down path into the furnace. Higher BTUH furnaces produce higher flue-gas temperatures. There are some models that will allow vertical venting option however. As another example (also cited in our references to the table) from CSA as incorporated by BC (British Columbia) Housing, we have at the very least a mould and moisture concern: elbow. to 7 in. 4.2 out of 5 stars 151. Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books. See CLOTHES DRYER VENT CLEARANCES & TERMINATION, 6. See MANUALS for HEATING SYSTEM CONTROLS for I&O Manuals for other heating equipment brands and models. $213.83. The vent pipe of your gas furnace plays an important role by carrying all toxic gases created during the combustion within the furnace out of the building. I want to convert my wood fireplace to a direct vent gas unit running the vent pipes up my existing chimney. for a gas fireplace exhaust termination cap, 3 feet (91cm) above - if within 10 feet (3m) horizontally. The Location of Tankless is in the Garage, On 2020-10-12 - by (mod) - sources for clearance distance to or requirement for sealed soffits over a direct vent for a gas heating appliance. for a gas fireplace exhaust termination cap, 3 feet (91cm) within a height of 15 feet (4.5m) above the meter / regulator assembly3.b. 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