Lennox furnace installation manual

Summary of Contents for Lennox G23 Series. Page 1 Библиотека СОК PRODUCT LITERATURE W1996 Lennox Industries Inc. Dallas, Texas 503,517M 9/98 SERIES Supersedes 8/96 GAS FURNACE Litho U.S.A. WARNING If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal …

Lennox Industries Inc. P.O. Box 799900 Dallas, TX 75379−9900 WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, person-al injury or loss of life. Installation and service must be performed by a qualified installer or service agency. Installation of Lennox oil−fired furnaces must conform with The reduction of high energy bills for those who are using old, and out-dated furnaces is a priority. It’s possible to do so through the use of high-efficiency forced-hot-air furna...Lennox replacement parts are essential for maintaining the performance and longevity of your Lennox heating and cooling systems. Whether it’s a faulty furnace ignitor or a worn-out...Manuals and User Guides for Lennox G26Q3-75. We have 2 Lennox G26Q3-75 manuals available for free PDF download: Unit Information, Installation Instructions Manual.Download this manual. See also: User's Information Manual. Service Literature. G32 series units are high−efficiency upflow gas furnaces. manufactured with DuralokPlust aluminized steel clam. shell type heat exchangers. G32 units are available in. heating capacities of 75,000 to 125,000 Btuh and cooling. applications up to 5 tons.The SLP98DFV furnace may be installed in alcoves, clos - ets, attics, basements, garages, and utility rooms. This furnace is not designed for installation in mobile homes, recreational vehicles, or outdoors. Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution

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 astandard gas-fired furnace heat exchanger and at least 4" away from any drum-type or oil-fired furnace heat ex-changer. Closer spacing may damage the drain pan and cause a leak. Refer to the Product Specification bulletin (EHB) for the proper use of these coils with specific furnaces, air han-dlers and line sets.The ML196UHE furnace may be installed in alcoves, clos-ets, attics, basements, garages, crawl spaces and utility rooms in the upflow or horizontal position. This furnace design has not been CSA certified for instal-lation in mobile homes, recreational vehicles, or outdoors. Use of Furnace as Construction HeaterINSTALLATION INSTRUCTIONS E 2010 Lennox Industries Inc. Dallas, Texas, USA G43UF MERIT SERIES GAS FURNACE UPFLOW AIR DISCHARGE 506497−01 03/2010 Supersedes 505,064M Litho U.S.A. THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This a safety alert symbol and should …Products that add to the performance of EL297V Gas Furnace. * The EL297V offers class-leading comfort with an energy rating of 97% AFUE. This high efficiency digital furnace is designed to pair with the Lennox S40 Smart Thermostat as part of a fully communicating home comfort system. It also qualifies for the United States federal Energy ...Return air tem- perature must not exceed 85°F (29°C) dry bulb. The SL280UHNV furnace may be installed in alcoves, closets, attics, basements, garages, and utility rooms in the upflow or horizontal position. This furnace is not designed for installation in mobile homes, recreational vehicles, or outdoors.Page 3: Safety Instructions. WARNING Safety Instructions 1 - Keep the furnace area clear and free of combustible Do not set thermostat below 60°F (16°C) in heating material, gasoline, and other flammable vapors mode. Setting thermostat below 60°F (16°C) reduces and liquids. If it is installed in an insulated area, the the number of heating ...When ordering parts, include the complete fur- necessary. View and Download Lennox EL297UHV Series user's information manual online. EL297UHV Series furnace pdf …

that can be used with a Lennox communicating thermostat as part of a communicating comfort system. All SLP99UHV units meet the California Nitrogen Oxides (NOx) Standards and California Seasonal Efficiency requirements. All specifications in this manual are subject to change. Pro­ cedures outlined in this manual are presented as recom­ Lennox Furnace 16L23 Installation instructions manual (8 pages) 9. Lennox 16L24. Lennox Furnace 16L24 Installation instructions manual (8 pages) 10. Lennox 16L25. Lennox Furnace 16L25 Installation instructions manual (8 pages) 11. Lennox LB-89657A.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 haz-2013 lennox industries inc. dallas, texas, usa air flow upflow air flow air flow horizontal left horizontal right installation instructions el296uhe elite® series gas furnace upflow / horizontal air discharge 507067-01 02/2013 supersedes 01/2012 this manual must be left with the homeowner for future referenceLennox (NYSE: LII) is a leader in energy-efficient climate-control solutions. Dedicated to sustainability and creating comfortable and healthier environments for our residential and commercial customers while reducing their carbon footprint, we lead the field in innovation with our cooling, heating, indoor air quality, and refrigeration systems.

Meat depot weekly specials.

side of the furnace installed in an upflow application. If the<br /> furnace is installed on a platform with bottom return, make<br /> an airtight seal between the bottom of the furnace and the<br /> platform to ensure that the furnace operates properly and<br /> safely. The furnace is equipped with a removable bottom<br />What you need to know about furnace installation begins with understanding the type of furnace that best suits your needs. Goodman Company offers a large selection of furnaces desi...ML193UH Parts Identification. NOTE − This manual is the property of the homeowner and must be left with the equipment user. This furnace is equipped with safety devices that protect you and your property. If one or more of these devices is activated, furnace operation will stop.G27M series units are mid-efficiency gas furnaces. manufactured with tubular aluminized steel heat ex. changers. G27M units are available in heating capaci. ties of 60,000 to 120,000 Btuh (17.6 to 35.2 kW) and cool. ing applications from 1.5 through 5 tons (3.5 through. 17.6 kW). Refer to Engineering Handbook for proper siz.

View and Download Lennox EL296UH045XV36B installation instructions manual online. EL296UHV series ELITE SERIIES GAS FURNACE UP/FLOW HORIZONTAL AIR DISCHARGE. EL296UH045XV36B air conditioner pdf manual download. Also for: El296uh110xv48c, El296uh110xv60c, El296uh135xv60d,...ML180UH Homeowner's Manual. 11/10. 506525−01. ML180UH SERIES. Litho U.S.A. 506525−01 11/2010 Supersedes 08/2010. 2010 Lennox Industries Inc. Dallas, Texas, USA. WHAT TO DO IF YOU SMELL GAS: Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other ap- pliance.Page 3: Safety Instructions. WARNING Safety Instructions 1 - Keep the furnace area clear and free of combustible Do not set thermostat below 60°F (16°C) in heating material, gasoline, and other flammable vapors mode. Setting thermostat below 60°F (16°C) reduces and liquids. If it is installed in an insulated area, the the number of heating ...Page 5 Lennox dealer, prior to reinstallation. Filters used inside the 90UGF series unit are available 5 - - Position filter door on end of filter so that the from Lennox and must be ordered separately. These thumb tab side of the filter door is away from the foam filters may be cleaned for reuse.View online or download Lennox Elite series Owner's Manual, Installation Instructions, Installation Instruction. ... Lennox Elite series. We have 27 Lennox Elite series manuals available for free PDF download: Installation Instructions Manual, Installation And Operation Manual ... Elite Series GAS FURNACE UPFLOW / HORIZONTAL AIR … Products that add to the performance of EL297V Gas Furnace. * The EL297V offers class-leading comfort with an energy rating of 97% AFUE. This high efficiency digital furnace is designed to pair with the Lennox S40 Smart Thermostat as part of a fully communicating home comfort system. It also qualifies for the United States federal Energy ... E30 Smart Hub with Cover Removed. Figure 2. Smart Hub LED Indicators. Unit Type Jumpers. Set the unit type jumper for the type of indoor unit being used (see “Figure 1. Smart Hub External Components” on page 3 and “Table 3. Unit Type Jumpers Positions”). The factory default setting is IFC. Summary of Contents for Lennox G23 Series. Page 1 Библиотека СОК PRODUCT LITERATURE W1996 Lennox Industries Inc. Dallas, Texas 503,517M 9/98 SERIES Supersedes 8/96 GAS FURNACE Litho U.S.A. WARNING If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal …LENNOX DISCLAIMS Do not install the furnace on its front or back. ALL LIABILITY IN CONNECTION WITH INSTALLER’S See FIGURE 4. Page 7 SETTING EQUIPMENT UPFLOW APPLICATION Place level on blower Place level on the front blower deck screws to check deck to check side to side forward tilt UNIT FRONT AIR FLOW 1/2” max.

The G40UH(X) furnace may be installed in alcoves, clos-ets, attics, basements, garages, and utility rooms in the up-flow or horizontal position. This furnace design has not been CSA International certi-fied for installation in mobile homes, recreational vehicles, or outdoors. Lennox does not recommend the use of G40UH(X) units as

INSTALLATION INSTRUCTIONS G1D91BT, CG90TB, & G1D93BT High Efficiency 90+ Condensing Gas Furnace WARNING Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional informa- tion, consult a qualified installer, service agency, or the gas supplier.View and Download Lennox G71MPP-36B-070 installation instructions manual online. G71MPP SERIES UNITS. G71MPP-36B-070 air conditioner pdf manual download. Also for: G71mpp-60c-090, G71mpp-60d-135, G71mpp-36c-090, G71mpp-60c-110. ... G71mpp series dave lennox signature collection gas furnace mult−position variable capacity (72 …1 Lf25-125/200 Standard Unit Dimensions. 2 Unit Heater Installation. 3 Combustion and Ventilation Air. 4 Venting. 5 Electrical Connections. Download this manual. WARNING. Improper installation, adjustment, alteration, service or. maintenance can cause property damage, personal injury.SLP99UHV Series furnace pdf manual download. Also for: Slp99uh070xv36b, Slp99uh090xv36c, Slp99uh090xv48c, Slp99uh090xv60c, Slp99uh110xv60c, Slp99uh135xv60d. ... Heating cable kit is available from Lennox of installation, prime trap per procedure outlined in in various lengths; 6 ft. (1.8m) - kit no. 26K68 and 24 ft. ...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 aPage 2: Unit Dimensions. G40UH (X) Unit Dimensions − inches (mm) 3−3/4 (95) *NOTE − 60C and 60D units that require air volumes over 1800 cfm (850 L/s) must have one of the following: 1. Return air from single side with transition which will accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) cleanable air filter.Related Manuals for Lennox G11 series. Heater Lennox LF25 Series Installation Instructions Manual (22 pages) Heater Lennox LF24-100 Installation Instructions Manual. Lf24 100,000 to 400,000 btuh series (18 pages) Heater Lennox LF24 Manual. Unit heaters horizontal-60 hz (13 pages)

Exit 68 on lie.

Fs22 production chains.

Manuals and User Guides for Lennox G26Q3-75. We have 2 Lennox G26Q3-75 manuals available for free PDF download: Unit Information, Installation Instructions Manual.Follow (he gas supplrer's Inspect and repl_-e furnace air filters twice annually instructions.If you do not smell gas go to ne)d step. (m_imum). Page 6 Handiooater is liP products No, 418 and is avail- teaser is RP products No. 418 and is available as able as Lennox part no. P-8-5069. Lennox part no, P-8-5069. 5- Reverse order of above steps to ...ML193UH Parts Identification. NOTE − This manual is the property of the homeowner and must be left with the equipment user. This furnace is equipped with safety devices that protect you and your property. If one or more of these devices is activated, furnace operation will stop.Furnace maintenance. Dirt is the biggest enemy of your furnace. It can waste fuel and drastically lower efficiency. In some cases, dirt buildup can even cause the furnace to overheat. Scheduling an annual checkup for your furnace is the most important part of regular furnace maintenance. LEARN MORE. Indoor Air Quality maintenanceAll Around Comfort. The SL297NV ultra-low NOx gas furnace with our revolutionary design provides reliable comfort, while producing 65% lower NOx emissions than standard low NOx furnaces. So, while you’re staying cozy and warm, you’re also helping to protect the environment. Learn more.that can be used with a Lennox communicating thermostat as part of a communicating comfort system. All SLP99UHV units meet the California Nitrogen Oxides (NOx) …View and Download Lennox Merit Series installation instructions manual online. GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE. Merit Series furnace pdf manual download. Also for: Merit ml296uhv series, Merit ml296uh045xv36b, Merit ml296uh070xv36b, Merit ml296uh090xv48c, Merit...G27M series units are mid-efficiency gas furnaces. manufactured with tubular aluminized steel heat ex. changers. G27M units are available in heating capaci. ties of 60,000 to 120,000 Btuh (17.6 to 35.2 kW) and cool. ing applications from 1.5 through 5 tons (3.5 through. 17.6 kW). Refer to Engineering Handbook for proper siz. ….

Manuals and User Guides for Lennox G26Q3-75. We have 2 Lennox G26Q3-75 manuals available for free PDF download: Unit Information, Installation Instructions Manual.Apr 7, 2015 ... How to replace and install 57M85 draft inducer on a Lennox G61 LP furnace. Part can be purchased from HVAC Parts and More here: ... G60UH(X) Gas Furnace The G60UH(X) gas furnace is equipped with a two−stage integrated control. Each G60UH(X) unit is shipped ready for installation in the upflow or horizontal position (left or right). The furnace is shipped with the bottom panel in place. The bottom panel must be removed if the unit is to be installed in a horizontal ... Follow (he gas supplrer's Inspect and repl_-e furnace air filters twice annually instructions.If you do not smell gas go to ne)d step. (m_imum). Page 6 Handiooater is liP products No, 418 and is avail- teaser is RP products No. 418 and is available as able as Lennox part no. P-8-5069. Lennox part no, P-8-5069. 5- Reverse order of above steps to ...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 …With the help of the Lennox S40 Smart Thermostat ultra smart thermostat, the SLP99V gas furnace unlocks a world of connectivity. It stays finely tuned to your home by using sensors to react, diagnose, and troubleshoot—all while remaining in constant contact with your dealer to ensure proactive responses. Geofencing technology ensures your air ...The ECB29 series electric heat section provides field-in-. stalled electric heat for various air handler units. These. electric heat sections are available in either single- or. three-phase. Single-phase heat sections are equipped. with either terminal blocks or circuit breakers. Refer to the model-specific air handler product specifica-.Apr 7, 2015 ... How to replace and install 57M85 draft inducer on a Lennox G61 LP furnace. Part can be purchased from HVAC Parts and More here: ...We have 4 Lennox EL296UH070XV36B manuals available for free PDF download: Unit Information, Installation Instructions Manual Lennox EL296UH070XV36B Unit Information (114 pages) Brand: Lennox | Category: Furnace | Size: 11.82 MB Lennox furnace installation manual, View and Download Lennox Merit Series installation instructions manual online. GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE. Merit Series furnace pdf manual download. Also for: Merit ml296uhv series, Merit ml296uh045xv36b, Merit ml296uh070xv36b, Merit ml296uh090xv48c, Merit... , When it comes to purchasing a new furnace, one of the most important factors to consider is the cost. However, it’s essential to look beyond the price tag and understand the true c..., Follow (he gas supplrer's Inspect and repl_-e furnace air filters twice annually instructions.If you do not smell gas go to ne)d step. (m_imum). Page 6 Handiooater is liP products No, 418 and is avail- teaser is RP products No. 418 and is available as able as Lennox part no. P-8-5069. Lennox part no, P-8-5069. 5- Reverse order of above steps to ..., MERIT® SERIES GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE 506816−01 06/2011 Supersedes 506778−01 THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death. WARNING , The G40UH(X) furnace may be installed in alcoves, clos-ets, attics, basements, garages, and utility rooms in the up-flow or horizontal position. This furnace design has not been CSA International certi-fied for installation in mobile homes, recreational vehicles, or outdoors. Lennox does not recommend the use of G40UH(X) units as, 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 …, Lennox (NYSE: LII) is a leader in energy-efficient climate-control solutions. Dedicated to sustainability and creating comfortable and healthier environments for our residential and commercial customers while reducing their carbon footprint, we lead the field in innovation with our cooling, heating, indoor air quality, and refrigeration systems., Lennox (NYSE: LII) is a leader in energy-efficient climate-control solutions. Dedicated to sustainability and creating comfortable and healthier environments for our residential and commercial customers while reducing their carbon footprint, we lead the field in innovation with our cooling, heating, indoor air quality, and refrigeration systems., Spectra CI2000HT. Installation And Operation Manual. Show all Lennox Wood stove manuals. View & download of more than 9636 Lennox PDF user manuals, service manuals, operating guides. Air Conditioner, Furnace user manuals, operating guides & specifications., • Furnace must be in its final location. The vent system must be permanently installed per these installation in-structions. • Furnace must be installed as a two pipe system and one hundred percent (100%) outdoor air must be pro-vided for combustion air requirements during construc-tion. • A room thermostat must control the furnace. The use , Furnace maintenance. Dirt is the biggest enemy of your furnace. It can waste fuel and drastically lower efficiency. In some cases, dirt buildup can even cause the furnace to overheat. Scheduling an annual checkup for your furnace is the most important part of regular furnace maintenance. LEARN MORE. Indoor Air Quality maintenance, All Around Comfort. The SL297NV ultra-low NOx gas furnace with our revolutionary design provides reliable comfort, while producing 65% lower NOx emissions than standard low NOx furnaces. So, while you’re staying cozy and warm, you’re also helping to protect the environment. Learn more., Loosen nut on bleed port to release air and oil mixture from fuel line. Allow mix-ture to escape until a steady stream of oil is emitted from the port. Drain at least 1/2 pint of oil from the pump. Retighten the nut on bleed port. If lockout oc-curs, press reset button and continue with bleed proce-dure. , MANUAL ©2017 Lennox Industries Inc. Dallas, Texas, USA 506476-01 04/2017 Supersedes 03/2017 ML193DF SERIES GAS FURNACE WARNING Improper …, The EL280DFE furnace may be installed in alcoves, clos-ets, attics, basements, garages, and utility rooms in the downflow position. This furnace design has not been CSA International certified for installation in mobile homes, recreational vehicles, or outdoors. Safety Lennox does not recommend the use of EL280DFE units , ML195UH. MERIT®SERIES. Upflow / Horizontal. Bulletin No. 210591 March 2019. Supersedes September 2018. AFUE - 95% Input - 44,000 to 132,000 Btuh Nominal Add-on Cooling - 2 to 5 Tons. MODEL NUMBER IDENTIFICATION. ML 1 95 UH 070 X P 36 B. Unit Type ML = Merit®Series Stages 1 = One-Stage Nominal Gas Heat InputBlower., Furnace maintenance. Dirt is the biggest enemy of your furnace. It can waste fuel and drastically lower efficiency. In some cases, dirt buildup can even cause the furnace to overheat. Scheduling an annual checkup for your furnace is the most important part of regular furnace maintenance. LEARN MORE. Indoor Air Quality maintenance, ELITE® SERIES GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE 507067-01 02/2013 Supersedes 01/2012 THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death. WARNING, Furnace maintenance. Dirt is the biggest enemy of your furnace. It can waste fuel and drastically lower efficiency. In some cases, dirt buildup can even cause the furnace to overheat. Scheduling an annual checkup for your furnace is the most important part of regular furnace maintenance. LEARN MORE. Indoor Air Quality maintenance, E 2008 Lennox Industries Inc. Dallas, Texas, USA 505,335M G71MPP 03/2009 Supersedes 03/2008 SERIES VARIABLE CAPACITY GAS FURNACE Litho U.S.A. WARNING FIRE OR EXPLOSION HAZARD. Failure to follow safety warnings exact- ly could result in serious injury, death, or property damage., The ML196UHE furnace may be installed in alcoves, clos-ets, attics, basements, garages, crawl spaces and utility rooms in the upflow or horizontal position. This furnace design has not been CSA certified for instal-lation in mobile homes, recreational vehicles, or outdoors. Use of Furnace as Construction Heater, Furnace maintenance. Dirt is the biggest enemy of your furnace. It can waste fuel and drastically lower efficiency. In some cases, dirt buildup can even cause the furnace to overheat. Scheduling an annual checkup for your furnace is the most important part of regular furnace maintenance. LEARN MORE. Indoor Air Quality maintenance, 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 haz-, Lennox Industries Inc. P.O. Box 799900 Dallas, TX 75379−9900 WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, person-al injury or loss of life. Installation and service must be performed by a qualified installer or service agency. Installation of Lennox oil−fired furnaces must conform with , View and Download Lennox ML196UHE installation instructions manual online. ML196UHE furnace pdf manual download. Also for: Merit series, Ml196uh030xe36b ... , 2017 lennox industries inc. dallas, texas, usa air flow upflow air flow air flow horizontal left horizontal right installation instructions ml180uhe merit® series gas furnace upflow / horizontal air discharge 507103-02 10/2017 supersedes 507103-01 this manual must be left with the homeowner for future reference, Install the furnace or air handler according to the installa-tion instructions provided with the unit. Position the cased coil on top of the furnace or air handler cabinet and secure it using field-provided screws. NOTE - If the coil is to be installed on an oil furnace, it may be necessary to install a field-installed transition between, 6 Control System Diagnostics. Download this manual. INSTALLATION INSTRUCTIONS. G1D91BU, G1D93BC, G1D93BU, CG90CB, & CG90UB. High Efficiency 90+ Condensing Gas Furnace. Improper installation, adjustment, alteration, service, or maintenance can cause. injury or property damage. Refer to this manual. For assistance or additional …, MANUAL ©2017 Lennox Industries Inc. Dallas, Texas, USA 506476-01 04/2017 Supersedes 03/2017 ML193DF SERIES GAS FURNACE WARNING Improper …, ML195UH. MERIT®SERIES. Upflow / Horizontal. Bulletin No. 210591 March 2019. Supersedes September 2018. AFUE - 95% Input - 44,000 to 132,000 Btuh Nominal Add-on Cooling - 2 to 5 Tons. MODEL NUMBER IDENTIFICATION. ML 1 95 UH 070 X P 36 B. Unit Type ML = Merit®Series Stages 1 = One-Stage Nominal Gas Heat InputBlower., INSTALLATION INSTRUCTIONS E 2011 Lennox Industries Inc. Dallas, Texas, USA ML180UH ® MERIT SERIES GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE 506816−01 06/2011 Supersedes 506778−01 Litho U.S.A. THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE This is a safety alert symbol …, Upgrade your heat, lower your gas bills. The Power Saver™ constant-torque motor design uses less energy in both heating and cooling modes, helping you save on utility bills. Adjusting airflow based on demand makes the ML193E gas furnace up to 46% more efficient than standard motors., Lennox ML193UH Instruction Manual. Merit series upflow / horizontal gas furnaces. Also See for ML193UH: Installation instructions manual (51 pages) , User's information manual (7 pages) , Installation instructions manual (51 pages) 1.