4 Things You Need to Know About High-Efficiency Furnace ... Example: A 130,000 BTU oil-fired furnace is installed in the basement near a 40,000 BTU gas-fired hot water heater. My questions are about . High Efficiency Furnace Venting: What You Need to Know PVC pipe is not listed and labeled as a combustion flue pipe material, as noted in the piping manufacturer's notes above, yet manufacturers of the water heaters and boilers seem to be avoiding the issue, and they continue to recommend the use of PVC flue venting in their installation instructions. PDF For Upflow & Downflow/Horizontal High Efficiency ... Anyone use PVC or CPCV vent pipe on a mod/con and have it in contact with wood or combustibles. Venting to be done with Gas Appliance Manufacturer's Association (GAMA) tables, or the manufacturer's instructions." Category II "An appliance that operates with a non-positive vent static pressure and with a vent gas temperature that AType B vent lining an exposed masonry chimney is considered to be an enclosed vent system, and these tables may be used. Termination The termination of chimneys or vents equipped with power exhausters shall be located a minimum of 10 feet (3048 mm) from the lot line or from adjacent buildings. Section 304.2 addresses conflicts. 609.4 Clearance.. Use a commercially available soap solution made . This is an alternative to the standard two pipe intake/vent shown in the basic furnace installation instructions. S636 CPVC vent pipe clearance to combustibles. diameter pipe systems, (See Figures 3, 4, 5, and 6 for the different applications.) System 1738 Flue Gas Venting offers a full range of pipe, fittings and termination components that are manufactured from an engineered PVC compound, rated for a maximum flue gas temperature of 149˚F and that are fully certified to the rigorous requirements of UL 1738 venting standard for gas-burning appliances, Categories II and IV. Where such clearances cannot be provided, the ground below and to the . 12 inches (30 cm) 12 inches (30 cm) N Clearance to the vent terminal of a dryer vent, water hater vent, or other appliances direct vent intake or exhaust. I asked him about how he would run the PVC vent if I went with a 96% furnace and he said he could potentially go into the wall and attach the pvc to my existing metal vents as the condensation only go to about 6 or so feet so it would be ok. Connect this furnace to an approved vent system only, as specified in the "Venting Requirements" section of these instructions. may be through a closet. clearance between the vent pipe and the insulation. PolyPro® - DuraVent. Is the location selected as near the vent and as . Observe all clearances listed in vent clearances in these instructions. All PVC/CPVC exhaust vent material used in Canada must be S636 certified. 1. 1.Gas vents that are 12 inches (305 mm) or less in size and located not less than 8 feet (2438 mm) from a vertical wall or similar obstruction shall terminate above the roof in accordance with Figure G2427.6.3. Due to the condensing nature of a high-efficiency furnace, its venting must be made of a material that is resistant to corrosion. 3. 1. Vent and air pipe maximum length 1. The ML193DF can be installed as a Direct Vent or Non− Direct Vent gas central furnace. The Concentric Vent allows both the intake for combustion air and the exhaust vent to pass through a standard roof or sidewall. Furnace Venting..www.genuine-comfort.comhttps://www.facebook.com/GenuineComfort • Transitioning from 2" to 3" PVC pipe should be done as close to the furnace as possible. This structure generally uses the furnace vent pipe through roof because the B venting pipe is designed in a vertical manner. When furnace is located within the heated space, exhaust fans can adversely affect its operation. A conversion kit (ordered separately) is re-quired for use in propane/LP gas applications. Exhaust fans in kitchen, bathrooms, clothes dryers or anywhere within heated space, increase combustion air requirements of non-direct vented furnaces. diameter pipe systems (See Figures 3, 4, 5, and 6 for the different applications.) Here's where I started the new install. Type B Vent shall not be used to vent flue NOTE: Termination height must be above roof surface or Also known as Type B, this vent is operating on natural air convection. 2. Venting for high-efficiency gas furnaces - Materials. 4 Part number 550-100-156_1017 ® 220/299/300/399 - Instructions Direct Exhaust Venting Venting & air — general (continued) ALL vent and air pipes require a bIRD SCREEn at each termination. 2.Gas vents that are over 12 inches (305 mm) in size or are located less than 8 feet (2438 mm) from a vertical wall or similar . Ask Question Asked 6 years, 7 months ago. Trim back the wood, shift the vent or …. If venting multiple units using multiple concentric vents, refer to Figures 5 & 6 for specific clearances. Combustion products must be discharged outdoors. Combustion products must be discharged outdoors. Direct vent — vent pipe and air pipe must each be at least 2 feet 4.ommon Vent Clearances C 19 4.1ect Vent Application - Vertical Installation Dir 19 4.2 Direct Vent Application - Horizontal Installation 19 4.3 Exhaust Vent Termination Clearances (For Direct Vent) 20 5.nstallation Check List I 21 6. The clay liner shall run from the outer surface of the bricks to the inner surface of the chimney liner. & @ 02/13 Printed on recycled paper DO NOT use PVC/CPVC on Non-Condensing Units. When the vent is withdrawing air from the house, it expels the gas outside through the vent. Refer to the manufacturer's installation instructions or the building department's requirements for the minimum distance, or clearance, between the furnace and the back wall at a heater closet . For clearances not specified in ANSI 223.1/NFPA 54 or CSA B149.1, one of the following shall be indicated: a) A minimum clearance value determined by testing in accordance with section 2.20, or b) A reference to the following footnote: "Clearance in accordance with local installation codes and the requirements of the gas supplier." Mechanical draft systems shall comply with UL 378 and shall be installed in accordance with their listing, the manufacturer's instructions and, except for direct-vent appliances, the following requirements: . Viewed 458 times 1 I have a hallow wall on my main floor which carries my gas furnace vent up thru the attic and out the roof. Warm-air Furnaces shall not be installed outside a building unless listed for exterior installation or enclosed in a waterproof housing. a vertical line above the vent and measure 6 feet on either side of that line. Vent kit is for 2, 2-1/2 or 3 in. intake/vent systems. The gas vent sizing tables are not applicable to outside (exposed) chimneys or vents below the roofline per NFPA 54. of 55 to 80% for older furnaces, boilers, and water heaters, and up to 78 to 82% for newer systems. Addition of snorkels to accommodate grade changes, to overcome vent termination/air supply A minimum clearance of 5.5" below the furnace must be . To combat this issue, high efficiency condensing furnace uses PVC pipes to extract the acidic water from your home. DO NOT operate unit until venting is completely installed and all solvents and glues have bonded. In a great majority of cases, plastic piping is used to vent high-efficiency equipment. This kit includes the bird screens. Two cases which can cause poor venting are the oversizing of the vent or reducing the . 3. ; The vent system shall terminate at least 4 feet (1219 mm) below . the furnace space as specified in the "Venting Requirements" section of these instructions. I know that the clearance from an operable window is 12" but what is the required distance from a side wall? This setup will likely cause recirculation issues, rotting of the deck, possibly a fire hazard for the vent kit and I pity the guy that needs to service that field controls venter. 2. Gas Appliance Direct Vent Clearances Distances from direct gas vent to building features Sidewall vent, direct vent, direct exhaust systems for gas fired heaters, water heaters, other appliances. 1. set back thermostat conditions) the last three feet of vent pipe can be reduced one nominal pipe size provided that the total vent length is at least 15 feet in length and the vent is sized in accordance with the venting requirements (Table 5) before this reduction is applied. This residual liquid is highly acidic. System A (12-inch clearance): A 3.5-inch-thick brick wall shall be framed into the combustible wall. Each type of vent pipe has recommended clearances to combustible materials. I'm trying to confirm the necessary clearance for a direct vent (concentric pipe) on a 95% propane furnace. Connectors Single-wall pipe (stovepipe) is not recommended for use in TYPE B venting systems. PVC piping straight up for 20 inches before turning it towards the exterior wall. Fig-Vent and air pipe diameters can be as specified in ure 2, page A-4. In this application, the vent and air-intake pipes must terminate outside the structure and must not be obstructed in any way. 1. As direct vent central forced air furnaces with all combustion air supplied directly to the furnace burners through a special air intake system outlined in these instructions. If installing a vertical venting system through any unconditioned space such as an attic or crawl space, it must be insulated. EXCEPTION: Direct vent furnaces, enclosed furnaces and electric heating furnaces. air and the exhaust vent to pass through a standard roof or sidewall. Category IV furnaces operate with positive vent pressure and with a vent gas temperature less than 140° F above the dewpoint. CSA B149.1 Natural Gas and Propane Installation Code now requires all special venting material to be certified to ULC S636 across . Termination should be positioned where vent vapors are not objectionable. of the vent plus the furnace input and efficiency are factors affecting the temperature of the flue-gases. 99. 4 Install this furnace in accordance with the American National Standard Z223.1 - latest edition entitled "National Fuel Gas Code" (NFPA54) and requirements or . • All furnaces are dual certified, and built with a 2" vent/ intake pipe and connectors. Traditional gas-fired, forced-air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes, or chimneys. NOTE − In Direct Vent installations, combustion air is taken It is classified as "Type BH" venting. • Do not connect to Type B, BW, or L vent or any vent connector. (Example: 3" to 2-1/2" or 2" to 1-1 . The optional Combustion Air Pipe is dependent on installation/code requirements PVC/ SRD fittings may be used. Triple-Walled: Triple-walled, obviously enough, consists of 3 pieces of metal and requires zero clearance. M1401.4 Transite generally requires 1 to 3 inches depending on various factors. Only use vent materials that are specified in this Installation Manual for use on this appliance. Gas vents of 12 inches or less in size and at least 8 feet away from a wall must terminate at least 1 foot above the Some models of single-wall metal flue vents need as much as 36 inches for proper fire safety clearance. I have a contractor who is replacing a rusted furnace vent on a 15 yr old + furnace. CVENT-3 is for use with 3 in. Natural vent. Do not block or obstruct air openings on furnace or spaces around furnace. The lowest portion of the floor furnace shall have not less than a 6-inch (152 mm) clearance from the grade level; except where the lower 6-inch (152 mm) portion of the floor furnace is sealed by the manufacturer to prevent entrance of water, the minimum clearance shall be not less than 2 inches (51 mm). The vent terminal shall be located not less than 3 feet (914 mm) above a forced air inlet located within 10 feet (3048 mm). However, unlike an inner stainless steel pipe, both these pipes are made of PVC schedule 40. Basic instructions on how to run pvc flue venting on high efficiency furnaces. The concentric vent kits are now certified with mechanically Gas furnace vent clearance from parallel PVC radon vent. 2. 1. Examples of such situations are as follows: a. Adequate clearance must be provided around the vent-air intake terminals. Forum discussion: I just had a new Bryant high efficiency furnace installed and I am having some concerns about the installation.If this helps the model is 340AAV048100ABSA. INSTALLATION: I began the installation of the new vent flue by purchasing schedule 40 PVC pipe in 2″ and 3″ diameters. 3. This picture is from the basement looking up at the vent and as you can see, the radon . Active 6 years, 7 months ago. Only one vent kit per each furnace or boiler is allowed. The G61MPV can be installed as either a Direct Vent or a Non−Direct Vent gas central furnace. air through PVC pipes to the outside, usually routed through the sidewall of the house. Combustion products must be discharged outdoors. Access to furnaces located in an attic or under-floor crawl space . The vent kit must terminate outside of the structure and should be installed vertically as shown in Figures 3 and 4, or The installation for this natural type . Metal Double wall / "B" vent requires 1 inch minimum clearance. #1. 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