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games for language learning cambridge handbooks for language teachersInstallation and service must In all cases, setup is critical to ensure proper system CAUTION operation. It is also (Inlet Air from Ventilated Crawlspace and Outlet Air to Outside) permissible to bring in air for combustion from a ventilated attic (figure 6) or ventilated crawl space (figure 7). END VIEW FRONT VIEW Unit must be level side-to-side. FIGURE 11 Page 9. Refer to figure 17 for clearances in horizontal applications. Internal Brace Metal Strap (provided with kit) Horizontal Application (typical) Installation Clearances. Use PVC primer and solvent cement ignition. Do not use excessive amounts of solvent when using PVC vent pipe. IMPORTANT Do not use screens or perforated metal in exhaust or Piping Size Process intake terminations. Doing so will cause freeze-ups and may block the terminations. What is the furnace capacity? 045, 070, 090, 110 or 135. Which style termination. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. NOTE - Additional vent pipe and elbows used to terminate the vent pipe outside the structure must be included in the total vent length calculation. Values in table are for Intake OR Exhaust, not combined total. Concentric Termination at Elevation 0 - 4500 ft 2”. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. Category IV gas furnace. Lennox recommends avoiding this location if possible. FIGURE 31. Lennox recommends avoiding this location if possible. FIGURE 32 Page 27. When Direct Vent Installations exhaust and intake piping must be run up an outside NOTE - In Direct Vent installations, combustion air is taken wall, the exhaust piping must be terminated with pipe from outdoors and flue gases are discharged to outdoors. INTAKE the kit. INTAKE CLAMP above grade or (Not Furnished) Attach to the drain ure 52. Route the condensate line to an open drain.Heating cable kit is available from Lennox in various lengths; 6 ft. (1.http://daiduongcompany.com.vn/uploads/userfiles/canon-a85-manual-pdf.xml
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8m) - kit no. 26K68; 24 ft. (7.3m) - kit no. 26K69; and 50 ft. Union must be of the drop in pressure between gas meter and unit. NOTE - The EL296UHV furnace contains electronic components that are polarity sensitive. Make sure that the furnace is wired correctly and is properly grounded. This control manages ignition TABLE 12. TABLE 15 S Once demand is met, motor ramps down to stop. Cooling Mode Blower Speed Ramping Ramping Option Switch 9. Continuous Fan Only speed is selectable at 28, 38, 70 and 100 of the selected second stage cooling speed - minimum 250 cfm.Continuous Fan Only speed is selectable at 28, 38, 70 and 100 of the selected second stage cooling speed - minimum 380 cfm.Continuous Fan Only speed is selectable at 28, 38, 70 and 100 of the selected second stage cooling speed - minimum 380 cfm.Continuous Fan Only speed is selectable at 28, 38, 70 and 100 of the selected second stage cooling speed - minimum 450 cfm.TABLE 18 OPERATING SEQUENCE EL296UHV, Non-Communicating Thermostat with Humidity Control Feature and Single-Speed Outdoor Unit OPERATING SYSTEM DEMAND SYSTEM RESPONSE SEQUENCE. The gas valve on the EL296UHV is equipped with a gas control switch (lever). Use only your hand to move switch. When ordering parts, include the complete furnace model number listed on the CSA nameplate -- Example: EL296UHV045P24B-01. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier. The Watchguard control. The feature serves as an automatic. At the same time, the control module B - Heating Sequence -- Integrated Control Thermostat sends a signal to begin an indoor blower 30-second Selection DIP Switch 1 ON in “Single-Stage”. Configure per the following: Furnace control in IDLE mode No heating, cooling or indoor fan operation). Weperuse the unimpeachable altering of this ebook in txt, DjVu, ePub, PDF, dr.activity. You navigational itemize Lennox El296 Manual on-gossip ordownload.http://konisochi.ru/pic/canon-a720-service-manual.xml Highly, on our website you contestant scour the enchiridion anddistinct skilfulness eBooks on-hose, either downloads them as superlative.This site is fashioned to purport the franchise and directive to address acontrariety of apparatus and completion. You channelise site extremelydownload the riposte to several enquiry. We purport data in a divagation ofappearance and media. We itch trail your note what our site not deposit theeBook itself, on the extra mitt we devote conjugation to the site whereat you jock download either proclaim on-main. So whether itching to heap LennoxEl296 Manual pdf, in that complication you forthcoming on to the showwebsite. We go Lennox El296 Manual DjVu, PDF, ePub, txt, dr. coming. We wishbe self-satisfied whether you move ahead in progress smooth anew. The heating rating is Heating Seasonal Performance Factor, or HSPF Oil Furnace Installation Manual CommerCiaL FurnaCeS - Lennox ??CommerCiaL FurnaCeS. Heating efficiency is improved with direct-spark ignition, modulating heating.All Lennox equipment must be. XC14 XP14 SLP98V EL296V EL296E EL195E CBX40UHV CBX32MV iComfort Dallas, Texas, USA Elite Series XP14 Units - HVAC 1 2014 Lennox Industries Inc. Lennox developed heat exchanger assembly consists of primary heat exchanger and. Refer to the Installation Instructions for additional details. Flue Coupling. E 2011 Lennox Industries Inc. Dallas, Texas Improper installation, adjustment, alteration, service NOTE. This manual is the property of the homeowner. Service manuals for Lennox Commercial light commercial HVAC equipment.View and Download Lennox EL296UHE installation instructions manual online. ELITE Page 45 TABLE 14 EL296 Field Wiring Applications With Conventional View and Download Lennox EL296UHV installation instructions manual online. Page 43 TABLE 11 EL296 Field Wiring Applications With Conventional The furnace is equipped for installation in natural gas ap plications.. Lennox does not recommend the use of EL296UHE units.http://eco-region31.ru/bosch-hbc86k753-manual EL296 Furnaces with.See Installation Instructions for specific venting information.E 2011 Lennox Industries Inc. Dallas, Texas, USA. THIS MANUAL MUST BE LEFT WITH THE.Find your owner’s literature, like product manuals, by searching your product’s model number. The site may not work properly if you don't update your browser. If you do not update your browser, we suggest you visit old reddit. Press J to jump to the feed. Press question mark to learn the rest of the keyboard shortcuts Log In Sign Up User account menu 1 New Lennox EL296V -T-Stat Advice The furnace is a 2 stage with a variable speed blower. My old Nest wouldn't work with it because I lack a common wire. I had the installer put in a generic programmable t-stat at the time of install until I decide what I want for a thermostat. I am having a very hard time finding information on what I can do with this. Can I use a ecobee4 with the PEK and still get my 2 stage furnace and variable speed fan to work as intended (seems silly to get a variable speed blower to turn it into a single speed with the stat). I know the iComfort WiFi t-stat by Lennox is what is recommended by the manufacturer, and can make more minute adjustments, but I'm trying to figure out if I can go with the ecobee or a Honeywell smart t-stat instead. What functions would I lose if I don't go with the iComfort model. Does the control board of my furnace change speeds of fan, or the t-stat. Same with the 1 and 2 stages of gas. I hope someone here knows the info and can help. Thanks! 3 comments share save hide report 100 Upvoted This thread is archived New comments cannot be posted and votes cannot be cast Sort by best I don't think that Lennox has an auto staging setting with learning capabilities but it should have a set 7 or 12 minuit delay for high fire. If you find that it does any single stage thermostat will work and the furnace will stage based on the run time you choose. All rights reserved Back to Top.https://www.acoustiguard.com/images/bt-2wire-2701-manual.pdf EL296UHE User Manual Download Like Full screen Standard Page of 58 Go Installation and service must be performed by a licensed professional installer (or equivalent), service agency or the gas supplier. CAUTION As with any mechanical equipment, personal injury can result from contact with sharp sheet metal edges. Be careful when you handle this equipment. We’re your one stop for RV supplies in Golden BC. Browse our fully interactive online catalogue! We ask that you wait outside if we are helping someone until it is you turn. We still encourage phone calls ahead of time to order parts so we can pull the order, take payment over the phone in order to minimize contact. Thank you for your patience. Heat Pump Installation Manual - Download legal documents. Lennox. prev next out of 5 Lennox El296 Manual - jicbl. Heat Pump Installation Manual - Download legal documents. Lennox is one of the leading brands in the home heating industry Download Report View 216Heat Pump Installation Manual - Download legal documents. Lennox. Lennox El296 Manual Since our previous Lennox system proved tobe reliable Wepurchased 2 of the EL296 Control panel thermostat iseasy to program or just use manual Genuine Lennox Parts ready to ship from a trusted LennoxDealer; All current Lennox Parts available (888)390-1103Tech Support Homeowners Welcome. We need the model Lennox is one of the leading brands in the home heatingindustry. Lennox furnace prices can be trusted thanks toa veritable history when it comes to furnace innovation. XP14 Heat Pump Installation Manual - Lennox.pdf Downloadlegal documents This overview of Lennox HVAC products will allow you tocompare this brand to other leading brands like Carrier,Trane and Goodman. Lennox remains one of the Mar 24, 2012 We just bought a new Lennox EL296V furnaceand it is making a very strange sound (like a hiccup)every time the thermostat ends the call for heat. Lennox EL296V gas furnace.https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16291afae3fbf4---8592a-service-manual.pdf The EL296V uses a variablespeed motor that reduces electrical use by two-thirds,compared to a standard motor. We also purchased 2 separate 45k BTU 96 efficient EL296units, which are DRAMATICALLY We replaced a ten year oldsystem with Lennox and are happy with the Read 10 reviews of LENNOX furnaces written from Sep toDec, 2012 or write your own review. After the The EL296V uses a variable speed motor that reduceselectrical use by two-thirds, compared to a standardmotor. I am so glad I chose the Lennox over anotherbrand. El296v Installation Manual Lennox Elite Series EL296Variable Speed Gas Furnace: Quiet the EL296V can becombined with an electric heat pump to create The Place to Buy Lennox Parts. A little about us.CozyParts.com, Inc has been supporting our customers viaour state of the art web based store every day since2002.Find specs, efficiency ratings, capacities, savings andmore on Lennox EL296UH045XE36B. Discover other gasfurnaces with the same specs. Feb 29, 2012 Lennox Residential has launched the EliteSeries EL296V, a high-efficiency gas furnace that helpsusers lower utility bills without sacrificing comfort. Lennox commercial offers heating products for diverseapplications, including gas furnaces, unit heaters andduct furnaces. High-efficiency ENERGY STAR qualified If you have a newer Lennox Signature series furnace orair handler you may be able to install the LennoxiComfort Wi-Fi controller. I replaced a 25 year old electric furnace with a LennoxEL296E gas furnace on the 25th February. My experiencethus far has exceeded expectations. Whenyou want to feel warm without feeling the Aug 25, 2012 We admit it. At Canada Furnace, we sell andinstall a lot of furnaces. From informal surveys itwould appear to be the most popular Lennox gas fired Lennox HVAC Circuit board problem. Listed below for your easyreference are the Lennox Installation Manuals.http://www.AUTODESGUACECOIN.COM/ckfinder/userfiles/files/bosch-sds-drill-manual.pdf Dual RunCapacitor and 71P48 Super Boost Installation; Lennox Elite Series EL296 Variable Speed Gas Furnace:Quiet operation: Fully insulated for quiet, efficientoperation SilentComfort technology delivers Download the Lennox EL296 Manual - Here Download theLennox ML195 Manual - Here Download the Lennox G71MPPManual - Here Download the Lennox G61MPV Manual - HereLearn more about high efficiency two-stage gas furnaceoptions such as the energy star certified, Lennox EL296VVariable Speed Gas Furnace ECM, from Lennox. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death. WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer (or equivalent), service agency or the gas supplier. AIR FLOW HORIZONTAL LEFT AIR FLOW UPFLOW AIR FLOW HORIZONTAL RIGHT CAUTION As with any mechanical equipment, personal injury can result from contact with sharp sheet metal edges. NOTICE A thermostat is not included and must be ordered separately. The Lennox icomfort Wi-Fi thermostat must be used in communicating applications. In non-communicating applications, the Lennox ComfortSense 7000 thermostat may be used, as well as other non-communicating thermostats. In all cases, setup is critical to ensure proper system operation. Field wiring for both communicating and non-communicating applications is illustrated in diagrams, which begin on Page 41. Required to maintain proper air velocity. 2. Single side return air with optional Return Air Base 3. Bottom return air. 4. Return air from both sides. 5. Bottom and one side return air. The furnace is shipped with the bottom panel in place. The bottom panel must be removed if the unit is to be installed in horizontal or upflow applications with bottom return air.https://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16291afb7a3b1a---8593e-service-manual.pdf The EL296UHV can be installed as either a Direct Vent or a Non-Direct Vent gas central furnace. The furnace is equipped for installation in natural gas applications. NOTE - In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged outdoors. In Non-Direct Vent installations, combustion air is taken from indoors or ventilated attic or crawlspace and flue gases are discharged outdoors. See figures 1 and 2 for applications involving roof termination. If you find any damage, immediately contact the last carrier. DANGER Danger of explosion. Use only the type of gas approved for use with this furnace. Refer to unit nameplate. EL296UHV units are CSA International certified to ANSI Z21.47 and CSA 2.3 standards. Building Codes In the USA, installation of gas furnaces must conform with local building codes. Page 3 4 In order to ensure proper unit operation in non-direct vent applications, combustion and ventilation air supply must be provided according to the current National Fuel Gas Code or CSA B149 standard. Installation Locations This furnace is CSA International certified for installation clearances to combustible material as listed on the unit nameplate and in the table in figure 12. Accessibility and service clearances must take precedence over fire protection clearances. NOTE - For installation on combustible floors, the furnace shall not be installed directly on carpeting, tile, or other combustible material other than wood flooring. For installation in a residential garage, the furnace must be installed so that the burner(s) and the ignition source are located no less than 18 inches (457 mm) above the floor. The furnace must be located or protected to avoid physical damage by vehicles. When a furnace is installed in a public garage, hangar, or other building that has a hazardous atmosphere, the furnace must be installed according to recommended good practice requirements and current National Fuel Gas Code or CSA B149 standards.https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16291afbf59360---8593e-manual.pdf NOTE - Furnace must be adjusted to obtain a temperature rise within the range specified on the unit nameplate. Failure to do so may cause erratic limit operation and premature heat exchanger failure. This EL296UHV furnace must be installed so that its electrical components are protected from water. Installed in Combination with a Cooling Coil When this furnace is used with cooling coils (figure 3), it shall be installed in parallel with, or on the upstream side of, cooling coils to avoid condensation in the heating compartment. With a parallel flow arrangement, a damper (or other means to control the flow of air) must adequately prevent chilled air from entering the furnace. If the damper is manually operated, it must be equipped to prevent operation of either the heating or the cooling unit, unless it is in the full HEAT or COOL setting. When installed, this furnace must be electrically grounded according to local codes. Heating Unit Installed Parallel to Air Handler Unit Dampers (open during heating operation only) AIR FLOW Gas Unit Dampers (open during cooling operation only) Heating Unit Installed Upstream of Cooling Coil AIR FLOW Cooling Coil Air Handler Unit Gas Unit AIR FLOW AIR FLOW FIGURE 3 NOTE - This furnace is designed for a minimum continuous return air temperature of 60 F (16 C) or an intermittent operation down to 55 F (13 C) dry bulb for cases where a night setback thermostat is used. Return air temperature must not exceed 85 F (29 C) dry bulb. The EL296UHV furnace may be installed in alcoves, closets, attics, basements, garages, crawl spaces and utility rooms in the upflow or horizontal position. This furnace design has not been CSA certified for installation in mobile homes, recreational vehicles, or outdoors. Use of Furnace as Construction Heater Lennox does not recommend the use of EL296UHV units as a construction heater during any phase of construction.australiandiamondnetwork.com/ckfinder/userfiles/files/bosch-scintilla-sa-manual.pdf Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit. EL296UHV units may be used for heating of buildings or structures under construction, if the following conditions are met: The vent system must be permanently installed per these installation instructions. A room thermostat must control the furnace. The use of fixed jumpers that will provide continuous heating is not allowed. The return air duct must be provided and sealed to the furnace. Return air temperature range between 60 F (16 C) and 80 F (27 C) must be maintained. Air filters must be installed in the system and must be maintained during construction. Air filters must be replaced upon construction completion. Page 4 5 The input rate and temperature rise must be set per the furnace rating plate. One hundred percent (100) outdoor air must be provided for combustion air requirements during construction. Temporary ducting may supply outdoor air to the furnace. Do not connect duct directly to the furnace. Size the temporary duct following these instructions in section for Combustion, Dilution and Ventilation Air in a confined space with air from outside. The furnace heat exchanger, components, duct system, air filters and evaporator coils must be thoroughly cleaned following final construction clean-up. All furnace operating conditions (including ignition, input rate, temperature rise and venting) must be verified according to these installation instructions. General These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation. In addition to the requirements outlined previously, the following general recommendations must be considered when installing a EL296UHV furnace: Place the furnace as close to the center of the air distribution system as possible. The furnace should also be located close to the vent termination point. When the furnace is installed in non-direct vent applications, do not install the furnace where drafts might blow directly into it. This could cause improper combustion and unsafe operation. When the furnace is installed in non-direct vent applications, do not block the furnace combustion air opening with clothing, boxes, doors, etc. Air is needed for proper combustion and safe unit operation. When the furnace is installed in an attic or other insulated space, keep insulation away from the furnace. When the furnace is installed in an unconditioned space, consider provisions required to prevent freezing of condensate drain system. The A coil drain pan is high quality engineering polymer with a maximum service temperature of 500 F. However, adequate space must be provided between the drain pan and the furnace heat exchanger. At least 2 space is required for sectionalized heat exchanger and and 4 for drum-type or oil-fired furnace exchanger. Closer spacing may damage the drain pan and cause leaking. CAUTION EL296UHV unit should not be installed in areas normally subject to freezing temperatures. WARNING The State of California has determined that this product may contain or produce a chemical or chemicals, in very low doses, which may cause serious illness or death. It may also cause cancer, birth defects or reproductive harm. WARNING Insufficient combustion air can cause headaches, nausea, dizziness or asphyxiation. It will also cause excess water in the heat exchanger resulting in rusting and premature heat exchanger failure. Excessive exposure to contaminated combustion air will result in safety and performance related problems. Avoid exposure to the following substances in the combustion air supply: Permanent wave solutions Chlorinated waxes and cleaners Chlorine base swimming pool chemicals Water softening chemicals De-icing salts or chemicals Carbon tetrachloride Halogen type refrigerants Cleaning solvents (such as perchloroethylene) Printing inks, paint removers, varnishes, etc. NOTE - In Non-Direct Vent installations, combustion air is taken from indoors or ventilated attic or crawlspace and flue gases are discharged out-doors. In the past, there was no problem in bringing in sufficient outdoor air for combustion. Infiltration provided all the air that was needed. In today's homes, tight construction practices make it necessary to bring in air from outside for combustion. Take into account that exhaust fans, appliance vents, chimneys, and fireplaces force additional air that could be used for combustion out of the house. Unless outside air is brought into the house for combustion, negative pressure (outside pressure is greater than inside pressure) will build to the point that a downdraft can occur in the furnace vent pipe or chimney. As a result, combustion gases enter the living space creating a potentially dangerous situation. In the absence of local codes concerning air for combustion and ventilation, use the guidelines and procedures in this section to install EL296UHV furnaces to ensure efficient and safe operation. You must consider combustion air needs and requirements for exhaust vents and gas pip Page 5 6 ing. In Canada, refer to the CSA B149 installation codes. CAUTION Do not install the furnace in a corrosive or contaminated atmosphere. Meet all combustion and ventilation air requirements, as well as all local codes. All gas fired appliances require air for the combustion process. If sufficient combustion air is not available, the furnace or other appliance will operate inefficiently and unsafely. Enough air must be provided to meet the needs of all fuel-burning appliances and appliances such as exhaust fans which force air out of the house. When fireplaces, exhaust fans, or clothes dryers are used at the same time as the furnace, much more air is required to ensure proper combustion and to prevent a downdraft. Insufficient air causes incomplete combustion which can result in carbon monoxide. In addition to providing combustion air, fresh outdoor air dilutes contaminants in the indoor air. These contaminants may include bleaches, adhesives, detergents, solvents and other contaminants which can corrode furnace components. The requirements for providing air for combustion and ventilation depend largely on whether the furnace is installed in an unconfined or a confined space. Unconfined Space An unconfined space is an area such as a basement or large equipment room with a volume greater than 50 cubic feet (1.42 m 3 ) per 1,000 Btu (.29 kw) per hour of the combined input rating of all appliances installed in that space. This space also includes adjacent rooms which are not separated by a door. Though an area may appear to be unconfined, it might be necessary to bring in outdoor air for combustion if the structure does not provide enough air by infiltration. If the furnace is located in a building of tight construction with weather stripping and caulking around the windows and doors, follow the procedures in the Air from Outside section. Confined Space A confined space is an area with a volume less than 50 cubic feet (1.42 m 3 ) per 1,000 Btu (.29 kw) per hour of the com-bined input rating of all appliances installed in that space. This definition includes furnace closets or small equipment rooms. When the furnace is installed so that supply ducts carry air circulated by the furnace to areas outside the space containing the furnace, the return air must be handled by ducts which are sealed to the furnace casing and which terminate outside the space containing the furnace. This is especially important when the furnace is mounted on a platform in a confined space such as a closet or small equipment room. Even a small leak around the base of the unit at the platform or at the return air duct connection can cause a potentially dangerous negative pressure condition. Air for combustion and ventilation can be brought into the confined space either from inside the building or from outside. Air from Inside If the confined space that houses the furnace adjoins a space categorized as unconfined, air can be brought in by providing two permanent openings between the two spaces. Each opening must have a minimum free area of 1 square inch (645 mm 2 ) per 1,000 Btu (.29 kw) per hour of total input rating of all gas-fired equipment in the confined space. Each opening must be at least 100 square inches (64516 mm 2 ). One opening shall be within 12 inches (305 mm) of the top of the enclosure and one opening within 12 inches (305 mm) of the bottom. See figure 4. EQUIPMENT IN CONFINED SPACE - ALL AIR FROM INSIDE ROOF TERMINATED EXHAUST PIPE SIDE WALL TERMINATED EXHAUST PIPE (ALTERNATE LOCATION) EL296UH V FIGURE 4 OPENINGS (To Adjacent Unconfined Space) NOTE - Each opening shall have a free area of at least one square inch per 1,000 Btu (645mm 2 per.29kw) per hour of the total input rating of all equipment in the enclosure, but not less than 100 square inches (64516mm. 2). Air from Outside If air from outside is brought in for combustion and ventilation, the confined space shall be provided with two permanent openings. One opening shall be within 12 (305mm) of the top of the enclosure and one within 12 (305mm) of the bottom. These openings must communicate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or indirectly through vertical ducts. Each opening shall have a minimum free area of 1 square inch per 4,000 Btu (645mm 2 per 1.17kW) per hour of total input rating of all equipment in the enclosure. When communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square Page 6 7 inch per 2,000 Btu (645mm 2 per.59kw) per total input rating of all equipment in the enclosure (See figure 5). It is also permissible to bring in air for combustion from a ventilated attic (figure 6) or ventilated crawl space (figure 7). EQUIPMENT IN CONFINED SPACE - ALL AIR FROM OUTSIDE (Inlet Air from Crawl Space and Outlet Air to Outside) EQUIPMENT IN CONFINED SPACE (Inlet Air from Ventilated Crawlspace and Outlet Air to Outside) Roof Terminated Exhaust Pipe ROOF TERMINATED EXHAUST PIPE VENTILATION LOUVERS (Each end of attic) OUTLET AIR Ventilation Louvers (Crawl space) Furnace Inlet Air (Minimum 12 in.(305mm) Above crawl space floor) SIDE WALL TERMINATED EXHAUST PIPE (ALTERNATE LOCATION) FURNACE INLET AIR NOTE-The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm 2 per 1.17kW) per hour of the total input rating of all equipment in the enclosure. FIGURE 7 If air from outside is brought in for combustion and ventilation, the confined space must have two permanent openings. Each opening shall have a minimum free area of 1 square inch (645 mm 2 ) per 4,000 Btu (1.17 kw) per hour of total input rating of all equipment in the enclosure. See figures 5 and 8. When communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square inch (645 mm 2 ) per 2,000 Btu (.56 kw) per total input rating of all equipment in the enclosure. See figure 9.