DuraTech - DuraVent
All-Fuel Chimney System10” to 24” diameterDuraTech Installation Instructions
A MAJOR CAUSE OF VENT RELATED FIRES IS FAILURETO MAINTAIN REQUIRED CLEARANCES (AIR SPACES) TOCOMBUSTIBLE MATERIALS. IT IS OF THE UTMOST IMPORTANCETHAT DURATECH BE INSTALLED ONLY IN ACCORDANCE WITHTHESE INSTRUCTIONS.IMPORTANT:Read through all of these instructionsbefore beginning your installation. Failureto install this product as described in theseinstructions will void the manufacturer’swarranty, may create a fire or other safetyhazard, and may affect your homeowner’sinsurance and safety listing of yourappliance.Dear Customer, Installer, or End User:We welcome any comments, ideas, input orcomplaints regarding matters pertaining toour DuraVent products.If you are searching for tech support orproduct information, please call us at800-835-4429.Or email us at:techsupport@duravent.comKeep these instructions for futurereference.LISTEDMH7399
For the most up-to-date installation instructions, see www.duravent.comCONTENTSDuraTech ALL FUEL CHIMNEY SYSTEM FOR 10" - 24" DIAMETERClearances, Permits, Equipment Needed, Chimney Applications, Notes . . 4Chimney Diameter, Height & Placement, Enclosure Requirements. . . . . . . 5Appliance Recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Ceiling Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Elbow Offset Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Tee Supported Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Masonry Fireplace Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Chimney Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Typical Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
CLEARANCESAlways allow at least a 2-inch clearancebetween DuraTech Chimney Pipe and anycombustible materials. Never fill any requiredclearance space with insulation or any othermaterials. Combustible materials includelumber, plywood, sheetrock, plaster and lath,furniture, curtains, electrical wiring and buildinginsulation. Keep single wall stovepipe at least18 inches away from combustible materials,unless a clearance reduction system that isacceptable to the authority having jurisdictionis used, or the appliance to be installed islisted and the instructions specify a differentclearance.PERMITSContact your local Building Official or FireOfficial regarding permits, restrictions, andinstallation inspections in your area.DURATECH CHIMNEYAPPLICATIONSDuraTech Chimney 1700 F (10”-24” diameter)is a complete chimney system tested andlisted to UL Test Procedure 103, and ULCS604. In the United States, DuraTechChimney can be used with wood fireplaces,furnaces, boilers, water heaters, ranges, orother residential-type appliances fueled by oil,gas, coal, or wood, that have been tested andlisted for use with a UL103 chimney system.In Canada, DuraTech can be used with oil &gas fired appliances listed for use with a TypeA Chimney, in accordance with ULC S604.DuraTech Chimney 1700 F is available in10” through 24” diameters. Do not use withforced draft, positive-pressure appliances.The DuraTech Chimney system is designedto extend vertically with a maximum of one(1) offset (two elbows total) of up to 30 from4vertical. DuraTech Chimney is listed under ULRe-examination Service Number MH7399.EQUIPMENT & MATERIALSDrill / DriverHammerCaulking GunPlumb BobScrewdrivers (Phillips & Standard)Tin SnipsSaber or Keyhole SawLevelDependable LadderTape MeasureProper Gloves and ShoesEye ProtectionMaterials You May Need:Non-hardening Waterproof Sealant8 Penny Nails#8, 2-1/2” & 1-1/2” Wood ScrewsRoofing Nails600 F RTV Silicone SealantINSTALLATION NOTESProper planning for your DuraTech Chimneyinstallation will result in greater safety,efficiency, and convenience, as well assaving time and money. You must useonly authorized DuraTech Chimney partsto maintain a listed Chimney system (notincluding the connector pipe). Do not mix partsor try to match with other products, or useimprovised solutions. Do not install damagedor modified parts. Each solid-fuel appliancemust be vented with its own chimney. Table1 lists the authorized DuraTech Chimneycomponents. Practice good workmanship.Sloppy work could jeopardize your chimney’ssafety. Keep electrical wiring and insulationaway from all chimneys and stovepipes. If youhave any questions, be sure to contact eitheryour dealer or DuraVent directly.
CHIMNEY DIAMETERFollow the appliance manufacturer’sinstructions to determine chimney diameterand clearances between combustible materialsand your heating appliance. Never choose achimney with an inside diameter smaller thanyour appliance’s outlet. If you are connectingto a masonry fireplace, refer to Table 4, forproper sizing. To calculate the chimney’soutside diameter, add 2 inches to the insidediameter.CHIMNEY HEIGHTThe National Fire Protection AssociationStandard #211 states: “Chimneys shallextend at least three feet above the highestpoint where it passes through the roof of abuilding, and at least two feet higher thanany portion of a building within ten feet.” (Fig1) 10”-16" diameter DuraTech Chimney maybe installed up to 40 feet high when using aSupport Box, and up to 30 feet high whenusing a Tee Support. DuraTech in 18”-24”diameters is intended to be mounted directlyto an appliance or masonry fireplace, and islimited in height by the allowable weight of thesupporting surface, up to a maximum of 60-ft.If the chimney extends more than 4 feet abovethe roof, an Extended Roof Bracket must beused. Due to the overlap of the joints, subtract3/4” from each Chimney Section’s height tocalculate installed height.CHIMNEY PLACEMENTWhen deciding the location of your chimney,try to avoid modifications to roof beams andother structural components of the building.Table 1DuraTech Chimney Components12”, 18”, 24” & 36” SECTIONSROUND CEILING SUPPORT BOXFIRESTOP RADIATION SHIELDEXTENDED ROOF BRACKETELBOW ATTICTRIM COLLARS FOR ROUNDSUPPORT BOXESINSULATION SHIELDADJUSTABLE ROOF FLASHINGTEE WITH TEE CAPWALL THIMBLEELBOW STRAPCHASE TOP FLASHINGTEE SUPPORTFINISHING COLLARBRACKET WALL STRAPFLAT ROOF FLASHINGCHIMNEY CAPROOF RADIATION SHIELDSANCHOR PLATESTORM COLLAR2 FT. MIN. ABOVEHIGHEST POINT OFROOF WITHIN 10 FT.3 FT.MIN.ABOVEROOF10'Figure 1CHIMNEY ENCLOSUREREQUIREMENTSThrough Rooms: Interior chimneys shallbe enclosed where they extend throughclosets, storage areas, occupied spaces, oranyplace where the surface of the chimneycould be contacted by persons or combustiblematerials. The space between the outer wallof the chimney and the enclosure shall be at5
condensation and creosote formation, andenhance draft. Include an access door by theTee Cap for chimney cleaning (Refer to NSHIELDFIRESTOPRADIATIONSHIELD(INSIDE)ENCLOSURE MUST HAVE 2INCHES OF CLEARANCEBETWEEN CHIMNEY AND WALLFIRSTFLOORSUPPORT BOXFigure 2least 2 inches (Fig 2).Multi-Story: Consult local building codeofficials for requirements in your area. TheNational Fire Protection Association Standard#211 states: “Factory-built chimneys thatpass through floors of buildings requiringthe protection of vertical openings shall beenclosed with approved walls having a fireresistance rating of not less than one hourwhen such chimneys are located in a buildingless than 4 stories in height, and not less than2 hours when such chimneys are located ina building more than 4 stories in height.” InCanada, except in single-family and two-familydwellings, chimneys which extend throughanother story must have an enclosure with afire resistance rating equal to or greater thanthat of the floor or roof assembly through whichthey pass.Cold Climates: In cold climates, chimneysmounted on an outside wall should beenclosed in a chase. Exterior chases reduce6APPLIANCE RECOMMENDATIONSFollow the appliance manufacturer’sinstructions. The requirements statedbelow pertain to all appliances installed withDuraTech Chimney systems.Choice: Choose an appliance that is listed bya recognized testing laboratory, is appropriatefor your needs, and is not larger than required.Installation: Once the chimney system is inplace, install the appliance and stovepipe(if applicable) as described in the appliancemanufacturer’s instructions. Be sure tomaintain all required clearances.Flues: Connect only one solid fuel applianceper chimney.Operation: Follow the appliancemanufacturer’s instructions and safety manualfor maximum efficiency and safety. Over-firingcan damage the appliance, stovepipe andchimney, and can void your warranties.Fuels: Do not burn driftwood, plastic, orchemically treated wood such as railroadties. They are corrosive to your applianceand chimney system. Follow the appliancemanufacturer’s instructions and safety manualin regards to fuels. Not all appliances areequipped to burn coal. Coal with a low sulfurcontent will reduce the possibility of corrosion.STEP-BY-STEP DIRECTIONSThere are three general types of DuraTechChimney installations:1. Ceiling-supported.2. Tee-supported (through-the-wall)3. Masonry FireplaceReview the step-by-step directions beforebeginning your installation.
CEILING SUPPORTCeiling supported systems are available fordiameters 10”-16".JOISTS &FRAMING1. Place Appliance: Position the applianceaccording to the manufacturer’s instructions.The flue outlet collar should be placedbetween the rafters or joists above, if possible.2. Frame Support Opening: Drop a plumbbob to the center of the appliance’s flue outletand mark this center point on the ceiling. Referto Table 2 for specific framing and clearancedimensions. Mark appropriate cutting linesaround the center point. Cut a square hole inthe ceiling for the Support Box. Frame a level,square opening centered over the hole whichyou have cut. (Figures 3 and 4).Figure 43-INCH MINIMUMREQUIRED BELOWFINISHED CEILINGCHIMNEY CAPSTORM TIONSHIELDCONNECTOR PIPEGOING TOAPPLIANCE.ALWAYS MAINTAIN AMINIMUM OF 18 INCHESCLEARANCE TOCOMBUSTIBLES FORSINGLE-WALL STOVEPIPEMINIMUM OF 3INCHES BELOWFINISHED CEILINGFRAMEDOPENINGROUNDSUPPORT BOXROUND TRIMCOLLARFigure 37
3. Install Support: For installation into a flatceiling, you need to use the Round SupportBox. The Round Ceiling Support Box hasthe option of a square or round Trim Collaravailable (Fig 5). The Support Box mustextend at least 3 inches below the finishedceiling. (Do not install beyond 4-1/2” belowfinished ceiling or the trim collar will not coverROUND SUPPORTBOX WITH SQUARETRIM COLLARCAPFigure INSULATIONSHIELD2 INCH MINIMUMCLEARANCE TOINSIDE OF MNEYSECTIONMINIMUM OF 3 INCHESBELOW FINISHED CEILINGCONNECTOR PIPETO APPLIANCE.MAINTAIN ATLEAST 18 INCHFOR SINGLE WALLSTOVEPIPEFRAMEDOPENINGROUNDSUPPORT BOXFigure 68SQUARETRIM
Table 2Inside Square Framing Dimensions(X" x X")Chimney Diameter10"12"14"16"18"20"22"24"CEILING SUPPORT BOX16 1/4" 18 1/4" 20 1/4" 22-1/4" nanananaWALL THIMBLE16"18"20"22"nanananaFIRESTOP RADIATION SHIELD16"18"20"22"24 1/4" 26 1/4" 28 1/4" 30 1/4"ATTIC INSULATION SHIELD16 1/4" 18 1/4" 20 1/4" 22 1/4" 24 1/4" 26 1/4" 28 1/4" 30 1/4"properly). Level the Support Box and secureit to the framing using at least three 8-pennynails per side (min. of 12 total). Wrap thestraps of the Support Box around the framingmembers (Fig 4), and secure with (2) 8-pennynails per side (eight nails total). Alternatively,you may use 1-1/2” #8 wood screws (min. of12 total for the Support Box, and 8 total forthe straps), instead of nails. Next, securethe round or square Trim Collar to the ceiling/framing members using (4) 1” long, roundhead wood screws.opening and maintain the 2-inch clearance tocombustibles.6. Install Firestop Radiation Shield: A FirestopRadiation Shield is required in multistoryinstallations at each floor penetration abovethat where the Support Box is located.Example: in a multistory home where theappliance is on the ground floor (SupportBox is in the 1st floor ceiling), you wouldneed a Firestop Radiation Shield at the 2ndfloor ceiling, and at the 3rd floor ceiling, etc.,4. Frame Openings: Frame openings ineach ceiling or floor above the Support Box(Fig 6). These openings are to hold theFirestop Radiation Shield and Attic InsulationShield. Locate each opening by dropping aplumb bob to the four corners of the openingbelow. Maintain the minimum clearances anddimensions as specified in Table 2. If Elbowsmust be used to avoid an obstruction, refer tothe Offset Elbow Installation section.5. Cut Roof Opening: Cut an opening in theroof directly above the opening below, andat least 4 inches larger than the chimney’soutside diameter to provide at least a2-inch clearance all around the chimney.The chimney must be centered within thisFRAMINGFIRESTOPRADIATIONSHIELDFigure 79
INSTALL ROOF RADIATIONSHIELDS WITH A 1/2"CLEARANCE FROM ROOFJOIST FACE.NAILS OR SCREWSROOFJOISTSROOFRADIATIONSHIELDSFigure 8CHIMNEYSECTIONSITS INSIDESUPPORTBOXSUPPORTBOX WITHSQUARETRIMFigure 9ATTICINSULATIONSHIELDFigure 1010including where the chimney penetrates intothe attic. Figure 6 shows a typical 2-storyinstallation with an attic.Note: a Firestop Radiation Shield is notinstalled where the chimney penetratesthrough the roof. Instead, you will need toinstall Roof Radiation Shields (required for18”-24” diameters only - see Step 7) aroundthe roof joist members. The Firestop RadiationShield is installed on the underside of theceiling/floor framing, with the cylindrical “tube”portion of the shield pointing upward (Fig 7).Use a minimum of either (1) 8 penny nail or (1)1-1/4” wood screws per corner. Refer to Table2 for framing requirements.7. Install Roof Radiation Shields: RoofRadiation Shields are required for 18”-24”diameter chimney installations. Roof RadiationShields provide protection for roof framingmembers.Note: Combustible materials will still need tobe a minimum of 2” away from the chimney.Roof Radiation Shields must be installed withtheir face 1/2” off of the roof framing joists (Fig8). Depending upon the pitch of your roof,trim the Roof Radiation Shields with tin snipsso they provide complete coverage of theroof framing exposed to the chimney. Securethe Roof Radiation Shields to the top of theframing members using at least (3) nails orscrews for each shield (Fig 8).8. Assemble Chimney Sections: Lower thefemale end of the first Chimney Section in theSupport Box (Fig 9). Sheet metal screws arenot required between the first Chimney Sectionand the Support Box. For each additionalChimney Section use the (6) Sheet metalscrews provided to make a secure connectionbetween the chimney sections (Fig 9). Do notpenetrate the inner liner of the chimney.
9. Install Attic Insulation Shield: Installthe Attic Insulation Shield where the chimneypasses into an attic. It’s purpose is to preventdebris and building insulation from getting tooclose to the chimney (Fig 10). An installedAttic Insulation Shield is 15 inches high. Inattic areas where this shield cannot fit, youmust enclose the attic portion of the chimneyin a framed enclosure. If the chimney is fullyenclosed through the attic, an Attic InsulationShield is not required. Where the chimneypasses into the attic, install the Attic InsulationShield as follows:a. If the Firestop Radiation Shield extendsabove the attic floor, no modifications arenecessary. The Firestop Radiation Shield willfit inside the Attic Insulation Shield.b. Assemble Chimney Sections until at least18 inches of chimney extends above theFirestop Radiation Shield.c. Slip the Attic Insulation Shield over theChimney and Firestop Radiation Shield untilthe base sits squarely on the framed opening(Fig 6 & 10).d. Secure the Attic Insulation Shield to thetop of the framed opening using at least (3)8-penny nails or (3) #8, 1-1/2” wood screwsper side (Fig 10).e. Wrap the Collar of the Attic InsulationShield around the chimney and fasten itloosely. Slide the Collar down to meet the AtticInsulation Shield. Tighten the bolts to securethe Collar in place (Fig 11).10. Attach Flashing: In new construction,assemble the Chimney Sections to a pointabove the roof, then slip the Flashing overthe chimney. On an existing roof, centerand install the Flashing before extending thechimney above the roof. Allow space to permitsliding the next Chimney Section up throughthe Flashing. Always ensure the chimneyFigure 11remains vertical (use a level), and that at leasta 2-inch clearance to combustible materials ismaintained all around. Install the upper edgeof the Flashing under the roofing. Nail to theroof along the upper edge and down eachside with 1-inch roofing nails. Do not nail thelower edge of the Flashing (Fig 12). Be sureto follow local building practices, as needed.Seal all nail heads with a non-hardeningwaterproof sealant. On flat or tarred andgraveled roofs, nail and seal the Flat RoofFlashing to the roof on all sides with roofingcompound. Do not put screws through theFlashing into the Chimney Pipe.11. Finish Top: Apply a non-hardeningwaterproof sealant around the chimney at thepoint where the Storm Collar will meet thechimney just above the Flashing, and alsoalong the vertical seam of the chimney pipe,where it is exposed to the weather (Figures12 and 13). Slide the Storm Collar downover the chimney to the top of the Flashing.Tighten the bolts of the Storm Collar and sealthe Storm Collar against the sealant. Afterinstalling sufficient Chimney Sections to meetthe height requirement as shown in Figure1, attach the Chimney Cap onto the top of11
ROOFINGFASTENERSADJUSTABLEFLASHINGFigure 12SEAL EXPOSED SEAMWITHNON-HARDENING HIGHTEMPSILICONE SEALANTPUSH COLLARDOWNTO FLASHING ANDSEAL WITHNONHARDENINGHIGHTEMPSILICONESEALANTFigure 13SNOWSPLITTERSNOWSPLITTERTOP VIEWFigure 1412the chimney by setting the female end of theCap onto the male end of the last chimneysection. Secure the Cap by using (6) sheetmetal screws provided. Do not push downfrom the top portion of the cap as this maydamage the cap. Push from the lower sectionof the Cap if needed. The Chimney Cap canbe removed for chimney cleaning as describedin the Chimney Maintenance section of theinstructions. Use an Extended Roof Bracket ifthe chimney extends more than 4 feet abovethe roof (Figures 16 & 17 in the ExtendedRoof Bracket section).If you are located in heavy snow country, a“snow splitter” should be used to protect thechimney by routing snow around the pipe.DuraVent offers a Snow Splitter or one canbe fabricated locally from heavy gauge sheetmetal (Fig 14).12. Enclosures: Enclose chimneys wherethey pass through occupied spaces, includingclosets. Always maintain at least a 2 inchclearance between the chimney and anycombustible materials. Interior enclosuresmay be constructed with standard framingand sheathed with sheetrock or plywood. UseWall Straps at least every 4 feet to maintain aminimum of 2 inches of air space between thechimney and combustible materials.OFFSET ELBOW INSTALLATIONDuraTech allows for the use of one pair of30 Elbows (measured from the vertical) forchimney sizes 10” - 24”. A 30 Elbow is thelargest that can be used in an offset fromvertical. A 30 Elbow may not be combinedwith another elbow to make a steeper offset(e.g. two 30 Elbows are not allowed to be puttogether to form a 60 elbow from vertical).Avoid Elbows if possible, since a totally verticalchimney is more efficient. When Elbows
are necessary to avoid obstructions suchas rafters, ridgepoles, or joists, you are onlyallowed to use 1 pair of Elbows in any onechimney syst
Installation: Once the chimney system is in place, install the appliance and stovepipe (if applicable) as described in the appliance manufacturer’s instructions. Be sure to maintain all required clearances. Flues: Connect only one solid fuel appliance per chimney. Operation: Follow the appliance manufacturer’s instructions and safety manual
6 7 15 15 18 19 21 For purposes of this manual, the 9' Cable DuraTech LE SRL in all iterations may be referred to collectively as the 9' DuraTech SRL-LE, the SRL-LE, the leading edge SRL, the SRL, the equipment, the device, the product, or the unit. Throughout this manual, ANSI Z359.0-2012 fall protection words, phrases and terms are used.
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