Lennox furnace nomenclature

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GAS FURNACES. In a natural gas or propane furnace, a pilot light ignites the source gas, igniting burners inside a combustion chamber. The generated heat then enters a heat exchanger, transferring heat to the air and raising the temperature of a space to the level set by a thermostat. Furnaces are rated by the Annual Fuel Utilization Efficiency ...The SL280UH060NV36A has a variable-speed blower motor and two-stage gas valve that allow the furnace to adjust its speed and airflow to maintain an ideal temperature. The first residential Ultra Low NOx gas furance you can purchase! Peace-Of-Mind Protection - The SL280NV comes with a 20-year limited warranty on the heat exchanger and a 10-year ...April 28, 2022. We had the Lennox Elite Series EL296V, 2-stage, variable speed, high efficiency gas furnace installed 3 weeks ago. This unit is much more quiet than the 20 year old Rheem 90 series that it replaced. It took approximately one week for the "new burner" smell to go away. We also replaced our old manual thermostat with an EcoBee ...− Lennox addon evaporator coils, electronic air cleaners and power humidifiers can be added to furnace. − Approved for use as unit heater. − Shipped factory assembled with all controls installed and wired. − Shipped for downflow and horizontal left hand air discharge, easily converted to horizontal right hand air discharge.Top Features of the A962V. Pro Series™ Systems. Pair this model with a Pro Series™ variable-capacity or two-stage air conditioner or heat pump and a Comfort Sync thermostat, for optimum performance. With the Pro Series, you're in control of every aspect of your home's climate, as well as your energy costs. Explore the Armstrong Air Pro ...Merit ML196E Series. Single-Stage, 96% Fuel-Efficient Gas Furnace with Power Saver™ Constant-Torque Motor Design. The Power Saver™ constant torque motor in the ML196E uses less energy in both heating and cooling modes, helping you save on utility bills. Flexible airflow based on a home's ductwork makes this furnace 33% more efficient than ...HVAC BRAND MODEL NUMBER NOMENCLATURE. Select one of the drop-down lists below. that corresponds to the FIRST letter. of your HVAC brand name. Then make your selection from the list. HVAC - A. HVAC - B. HVAC - C. HVAC - D.

Deciphering the model number shows that this Amana furnace model is an upflow gas furnace with induced draft, a nominal output of 45K Btuh, that it is not NO x certified, and has an airflow capability of three tons. Table 7.2.1 Amana Furnace Model Number Description G U I D 045 C A 30 Product Type Supply Type Furnace Type Model Features Nominal ...FEATURES ALL MODELS Item LCA/LGA/LHA180 LCA/LGA210 LCA/LGA/LHA240 Air Flow Choice — Bottom (down-flow) or horizontal (side) supply and return air Standard Standard Standard Bottom Power Electrical/Gas Entry Standard Standard Standard Cabinet — Heavy gauge galvanized steel, fully insulated, powdered enamel paint fin- ish, large removeable …In today’s digital age, having a strong online presence is crucial for any business. This holds true for Lennox dealers and contractors who want to showcase their expertise and att...Service Literature. G40UH (X) series units are mid−efficiency gas furnaces. used for upflow or horizontal applications only, manufac-. tured with Lennox Duralok Plus heat exchangers formed of. aluminized steel. G40UH (X) units are available in heating. capacities of 44,000 to 154,000 Btuh and cooling applica-. tions up to 5 tons.G = Gas Furnace Series 40 = 80% Minimum AFUE Nominal Add−On Cooling Capacity 24 = 2 tons 36 = 3 tons 48 = 4 tons 60 = 5 Tons 1 090 = 88,000 BtuhCabinet Width ... Blower data from unit tests conducted in Lennox Laboratory air test chamber. ISO 9001 Registered Manufacturing Quality System. Applications Input capacities of 44,000, 66,000, 88,000 ...

Some older Lennox evaporator coils were even coded according to the face area or square inches of the coil. (e.g.. C4-495 was a Series 4 coil with 495 square inches of face area). I emailed you the Lennox model and serial number guide for these older systems. Instead of learning the tricks of the trade, learn the trade.Optional Accessories 36K Derate Kit (045 models only) Allows 045 (44K input) models input to be reduced to 36K. For use with natural gas only. High Altitude Orifice Kits Required …Luxaire® has been setting the HVAC standard since 1939. Learn how our industry-leading residential dealer network and world-class commercial support services continue our legacy of comfort. Luxaire® Advantage. Built for Today, and Tomorrow Through a premier line of high-performance heating and air conditioning products, Luxaire® delivers the ...In most cases, there’s a tag containing the serial number, carrying a label such as “Serial #” or “S/N.”. If you can’t find the manufacture date on the data plate, the next place to check is inside the electrical control box. Some Lennox air conditioners contain a sticker with the manufacture date on the inside of the control box cover.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.Buy your horizontal gas furnace on LennoxPros, a trusted HVAC supplier for contractors. HVAC professionals can shop this constant torque unit online at Pros. en. English (EN) Français (FR) ... Lennox Elite EL280E, EL280UH070E36A, 80% AFUE, 66000 BTU, 3 Ton, 2 Stage Heat, Constant Torque Upflow/Horizontal Gas Furnace. Cat # : 17D37.

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Use the link below to register your product. A new browser window will open, allowing you to enter your information. For eligible Merit and Elite series products, homeowners have the opportunity to obtain the default 5-year parts only extension (for a total of 10-years parts only coverage) or, in lieu of that option, they have the opportunity ...In most cases, there's a tag containing the serial number, carrying a label such as "Serial #" or "S/N.". If you can't find the manufacture date on the data plate, the next place to check is inside the electrical control box. Some Lennox air conditioners contain a sticker with the manufacture date on the inside of the control box cover.Lennox Price Book for a complete list of thermostats. CABINET Conditioned areas insulated with foil faced insulation to minimize heat loss and reduce operating sound levels. Powder paint for maximum durability. Easy service access. PVC (polyvinyl chloride) coated steel wire guard provides complete coil protection.TRANSFORMER. All CBX25UH series units use a single line voltage to 24VAC transformer mounted in the control box. The transformer supplies power to the control circuits in the indoor and outdoor unit. Transformers are rated at 40VA. 208/240VAC single phase transformers use two primary voltage taps as shown in figure 3.HVAC units are identified by their multiple-character model number that identifies a particular type of unit. ... 4TT*** Unit Nomenclature. Short Description - Trane®, Split System Cooling (1½ - 5-tons) 4 1 T 2 T 3 B 5 3 6 0 7 36 8,9 1 10 000 11,12,13 A 14 A 15. 4TW*** Unit Nomenclature.Electric Heat • • • • •

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 ...LennoxLennox Serial Number Nomenclature - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Lennox serial number decodingA variable-speed fan keeps temperature swings to a bare minimum. Two-stage heating saves gas by adjusting the flame size based on demand. Relax. Save money every month. With a 96% efficiency rating, the ML296V gas furnace uses 2/3 less energy than competitive single-speed units so you pay for perfectly heated air, not wasted energy.Page 2: Unit Dimensions. A80UH1E & 80G1UHE Unit Dimensions - inches (mm) NOTE - 20C and 20D size units installed in upflow applications that require air volumes of 1800 cfm (850 L/s or greater must have one of the following: 1. Single side return air with transition, to accommodate 20 x 25 x 1 in.Summary of Contents for Lennox LGA Series. Page 1 36.6 kW) heating inputs, with the LGA036 available only in 78,000 heating input. Gas heat sections are designed with Lennox' aluminized or optional stainless steel tube heat ex- changers. The LCA cooling packaged rooftop units are equipped with the same cooling sections as the LGA units.The name Île-de-France translates to "Island of France" which was derived from its historic borders of the rivers Seine, Oise, Marne and Beuvronne which surrounded it like an island. The name may also come from the Frankish language "Lidle Franke" / "Lilde Franke", which means "little France". At the time, the Frankish tribes ...1 − Keep the furnace area clear and free of combustible material, gasoline, and other flammable vapors and liquids. If it is installed in an insulated area, the furnace must be kept free of insulating material. Insulating ma-terial may be combustible. 2 − DO NOT obstruct air flow to unit.Matching Lennox Furnace - Cabinet Width Designation C A B B C Coil & Furnace Cabinet Width - in. 21 14-1/2 17-1/2 17-1/2 21 Shipping Data - lbs. 48 46 50 55 60 SPECIFICATIONS 4 TO 5 TON General Data Model No. CX35-49C-6F CX35-50/60C-6F CX35-60C-6F CX35-60D-6F Nominal size - Tons 4 4 / 5 5 5 Line Connections in. Suction / vapor o.d. - sweat …

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Welcome to HVAC-Talk.com, a non-DIY site and the ultimate Source for HVAC Information & Knowledge Sharing for the industry professional! ... Is anybody here familiar with the Mammoth nomenclature? Here are the model numbers: DHEBFRC-162-3256-L275-M24 DHEBFRC-171-G256-L275-M25 DHEBFRC-212-G256-L275-M26 Any information would be greatly ...Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA International nameplate −− Example: SLP98UH070V36B. All service must be done by a li- censed professional installer (or equivalent), a service agency, or the gas supplier.the furnace, the control and the technician at the same electrostatic potential. Neutralize electro­ static charge by touching hand and all tools on an unpainted unit surface, such as the gas valve or blower deck, before performing any service pro­ cedure. ELECTROSTATIC DISCHARGE (ESD) Precautions and Procedures CAUTIONRelated Manuals for Lennox GCS16 Series. Industrial Equipment Lennox GCS16 Series Manual (134 pages) Gas Heater Lennox Shadowdance LSVFSD-18 Installation And Operation Instructions Manual. Shadowdance series vent-free millivolt dual-listed gas log sets (20 pages)My name is***** have Lennox CBS 18-51-3p electric furnace with a/c. In the a/c mode the blower comes on for approximately 5 minutes the trips the fuse in the transformer. While it is running there is only 5 volts on the terminal strip. I was wondering if it could be a bad sequencer. Thanks. Contractor's Assistant: Did you check the furnace's ... ML196UH045XE24B. Single-stage Gas Furnace with Power Saver™ Technology. The Power Saver ™ constant torque motor design uses less energy in both heating and cooling modes, helping homeowners save on utility bills. Flexible airflow based on a home's ductwork makes the ML196E 33% more efficient than older PSC motors, while also delivering high ... Solar. SunSource® Commercial Energy System5. Factory. Field. Visit us at www.lennox.com For the latest technical information, www.lennoxcommercial.com Contact us at 1-800-4-LENNOX ©2019 Lennox Industries, Inc. (14G47) 2/19 PC92164. 92164_energence_RTU_qr_guide.indd 2. 3/4/19 9:30 AM.An HVAC zoning system (also referred to as “zoned HVAC”) is a heating and cooling system that uses dampers in the ductwork to regulate and redirect air to specific areas of the home. This allows for the creation of customized temperature zones throughout the home for increased comfort and efficiency. Learn More.Fiberglass wool may also cause respiratory, skin, and eye irritation. To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor. Lennox Industries Inc. P.O. Box 799900 Dallas, TX 75379−9900.

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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...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...AMV91155DXA. models beginning with CUX or CDX. All models beginning with AUC or ADC. All models beginning with AUY or ADY. American Standard. Freedom 90 Single Stage or High Efficiency. Gas. 91 92.1. All models beginning with AUX1 or ADX1.Enter the 7-digit CP/Serial Number of the boiler to obtain the manufacturing date and any associated information on the product. If the CP# is only 6 digits, enter a leading zero, e.g. 0137718. This look-up will not give manufacturing information for any other Weil-McLain product but boilers.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-The first two numbers stand for the factory where the unit was manufactured. The second two numbers are the year in which the unit was manufactured. For instance, if your unit's serial number is 1210B12345, this would mean that your unit was made in the year 2010 (12 would refer to the factory). Carrier/Bryant/Payne: This manufacturer often ...Lennox Industries Inc. P.O. Box 799900 Dallas, TX 75379-9900 NOTE - This manual must be left with the equipment user. WARNING. Do not set thermostat below 60°F (16°C) in heating mode.Settingthermostat below 60°F (16°C)reduces the number of heating cycles. Damage to the unit may occur that is not covered by the warranty.View and Download Lennox G24M SERIES unit information online. G24M SERIES furnace pdf manual download.G16Q2-50-5 Parts & Furnace Model Repair Help. Find the right Lennox Furnace Model G16Q2-50-5 replacement parts for your repair. Filter results by part category, part title and lawn mower symptoms. You can also view G16Q2-50-5 parts diagrams and manuals, watch related videos or review common problems that may help answer your questions to get started on fixing your Furnace model.CREDITS & REBATES 1. 1 Lennox Industries Inc. ( " Lennox " ) is not acting in the capacity of a legal or tax advisor and does not make any representation, warranty, guarantee or other assurance as to whether a particular matchup qualifies or is eligible for a tax credit or rebate. This document has been prepared for informational purposes only ... ….

G24M series gas fired furnaces include eight models (natural gas or propane) with input capacities of 13.2, 17.6, 22.0, 29.3, 35.2 and 41.0 kW (45 000, 60 000, 75 000, 100 000, 120 000. Down-Flow Closet Installation With Cooling Coil. and 140 000 Btuh). Up-flow, down-flow or horizontal applications. Lennox add-on evaporator coils, electronic ...G24M series gas fired furnaces include eight models (natural gas or propane) with input capacities of 13.2, 17.6, 22.0, 29.3, 35.2 and 41.0 kW (45 000, 60 000, 75 000, 100 000, 120 000. Down-Flow Closet Installation With Cooling Coil. and 140 000 Btuh). Up-flow, down-flow or horizontal applications. Lennox add-on evaporator coils, electronic ...Matching Lennox Furnace - Cabinet Width Designation A B A B 1 Coil & Furnace Cabinet Width - in. 14-1/2 17-1/2 Shipping Data - lbs. Uncased 18 20 23 24 Cased 30 34 38 43 1 Uncased coils match furnaces without any overhang but require optional adaptor base or field fabricated transition to match furnace width. SPECIFICATIONS 2.5 TO 3 TONView and Download Lennox G17Q2-50 unit information online. G17 Series G17X Series. G17Q2-50 furnace pdf manual download. Also for: G17qx-50, G17q3-75, G17q3x-75, G17q3-100, G17q4-100, G17q3x-100, G17q4x-100, G17q5-100, G17q6-100, G17q5x-100, G17q6x-100, G17q5-125, G17q6-125. ... Lennox 80% gas-fired furnace installation instructions (20 pages ...Manuals and User Guides for Lennox CHA16-1353. We have 1 Lennox CHA16-1353 manual available for free PDF download: Service Manual ... Furnace Air Conditioner Heat Pump Indoor Fireplace Thermostat. More Lennox Manuals . manualslib. Our app is now available on Google Play About Us ...Raider® rooftop units from Lennox Commercial are the new standard for cost efficient reliable, efficient rooftop units built for long-lasting performance that can significantly improve indoor environments. CONTENTS 1. Heat Exchanger 2. Scroll Compressor 3. Lennox’ Environ™ Coil System 4. Outdoor Coil Fan Motor 5. Heavy Gauge Steel Cabinet 6. ML196UH045XE24B. Single-stage Gas Furnace with Power Saver™ Technology. The Power Saver ™ constant torque motor design uses less energy in both heating and cooling modes, helping homeowners save on utility bills. Flexible airflow based on a home's ductwork makes the ML196E 33% more efficient than older PSC motors, while also delivering high ... Lennox G26Q3-75 Pdf User Manuals. View online or download Lennox G26Q3-75 Unit Information, Installation Instructions Manual ... Lennox Manuals; Furnace; G26Q3-75; Lennox G26Q3-75 Manuals. Manuals and User Guides for Lennox G26Q3-75. We have 2 Lennox G26Q3-75 manuals available for free PDF download: Unit Information, Installation Instructions ... HVAC BRAND MODEL NUMBER NOMENCLATURE. Select one of the drop-down lists below. that corresponds to the FIRST letter. of your HVAC brand name. Then make your selection from the list. HVAC - A. HVAC - B. HVAC - C. HVAC - D. Lennox furnace nomenclature, Fiberglass wool may also cause respiratory, skin, and eye irritation. To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor. Lennox Industries Inc. P.O. Box 799900 Dallas, TX 75379−9900., Engineered to last. The compressor is the part of an air conditioner that pumps refrigerant to deliver the cooling your home needs. The precision scroll compressor found in the 13ACX has been thoroughly tested in harsh conditions to make sure it will provide years of worry-free comfort., Lennox G23Q2/3-75 Installation Instructions Manual (31 pages) Brand: Lennox | Category: Furnace | Size: 0.7 MB. Lennox G23Q2/3-75 Pdf User Manuals. View online or download Lennox G23Q2/3-75 Unit Information, Installation Instructions Manual., The document discusses Lennox product model number nomenclature. Model numbers contain codes that provide specific information about the unit such as the series, capacity in Btuh or tons, and power characteristics. Serial numbers are also systematically coded for identification. The document provides examples of typical model numbers and ..., Model/Part # : ML196UH090XE48C. Sign in for pricing and availability. Top AHRI Matches. Print. Quantity: Add to Cart. Save to List. Specifications. Legal. Product Overview. Merit …, Offering industry-leading efficiencies of up to 26.00 SEER, Lennox air conditioners can help you save hundreds of dollars every year in utility costs. And since some of the units are ENERGY STAR ® certified, they may even qualify you for federal energy tax credits and local utility rebates. In addition, a number of Lennox air conditioners work ..., DUO MR key benefits, nomenclature and technical data. vertical_align_bottom PDF 0.76 MB. Brochure DUO MR DUO MR bénéfices, nomenclature et données techniques ... Commercial & Industrial HVAC Visit Lennox. Commercial Refrigeration Solutions Visit Friga-Bohn. Specialised Retail and Industrial Refrigeration Solutions Visit HK Refrigeration., GAS FURNACES ML193UH MERIT® SERIES Upflow / Horizontal Bulletin No. 210588 March 2019 Supersedes September 2018 AFUE - 93% Input - 44,000 to 132,000 Btuh ... Approved for all Lennox 90% furnaces. Termination Kits Facilitates installation of combustion air intake pipe and flue exhaust pipe., How to determine the date of production/manufacture or age of Aire-flo® brand HVAC Systems. The industry average service design life for most forced air furnaces is 15-20 years, and the industry average service design life for most air conditioning condensing units is 10-15 years. The average service design life of boilers can vary from as ..., 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., Get A Solutions For All HVAC Services. Name. Email. Phone. Contact Me Now! Book Online Now. (604)704-0300. Furnace Installation, Maintenance & 24 Hour Repair Service., Lennox Merit ML180E, ML180UH045E36A, 80% AFUE, 44000 BTU, 3 Ton, 1 Stage Heat, Constant Torque Upflow/Horizontal Gas Furnace. Cat # : 81W21. Model/Part # : ML180UH045E36A, To determine the age of your Lennox HVAC system, focus on the serial number’s third and fourth digits, representing the year of manufacture. Following these, a letter denotes the month, with ‘A’ for January and continuing alphabetically to ‘M,’ excluding ‘I.’. For instance, in serial 1919H16627, “19” signifies the year 2019 ..., el units are equipped with the Lennox SureLight silicon ni-tride ignition system. The G50UH(X) unit meets the Califor-nia Nitrogen Oxides (NOx) Standards and California Sea-sonal Efficiency requirements. All units use a redundant gas valve to assure safety shut−off as required by C.S.A. All specifications in this manual are subject to change ..., April 28, 2022. We had the Lennox Elite Series EL296V, 2-stage, variable speed, high efficiency gas furnace installed 3 weeks ago. This unit is much more quiet than the 20 year old Rheem 90 series that it replaced. It took approximately one week for the "new burner" smell to go away. We also replaced our old manual thermostat with an EcoBee ..., Lennox Furnace Model GSR14Q3-80-7-7 Parts. Lennox Furnace Model GSR14Q3-80-7-7 Parts are easily labeled on this page to help you find the correct component for your repair. Filter results by category, title and symptom. You can also view diagrams and manuals, review common problems that may help answer your questions, watch related videos, read insightful articles or use our repair help guide ..., On average, a furnace will cycle every 10 to 20 minutes. The amount of time between cycles is dependent on a number of factors, including the outside air temperature and the temper..., 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., Award signifies that Lennox has made outstanding contributions to design energy efficient units that will lower energy bills, while meeting industry standards for comfort and indoor air quality. Lennox was the first HVAC manufacturer to win this award and has been a four−time recipient since 2003. ISO 9001 Registered Manufacturing Quality System., The role of the evaporator coil. Located inside the blower compartment or air handler, the evaporator coil holds the chilled refrigerant that the compressor moves into it. As the air from the blower fan moves over the coil, the cold refrigerant removes the heat from your home’s air. The refrigerant becomes warmer and travels to the condenser ..., Brand info that may help determine an age or era. Select one of the drop-down lists below. that corresponds to the 1st letter. of your HVAC brand name. Then make your selection from the Brand Names list. HVAC - A. HVAC - B. HVAC - C. HVAC - D., Lennox Serial Number Nomenclature - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Lennox serial number decoding, Lennox MLA024S4S-1P is specifically designed for performance in severe cold climates. MLA units will perform 100% capacity at 0°F; with capability to operate down to -22°F. So no matter how severe the temperature, Lennox MLA ductless heat pumps continue to deliver optimum heating and cooling performance and maximum energy savings., EL296UHV(X) Revised 06/2021. icomfort®- ENABLED EL296UHV(X) SERIES UNITS. EL296UHV(X) series units are 90% efficiency gas furnaces used for upflow or horizontal applications only, manufac­ tured with Lennox Duralok heat exchangers formed of aluminized steel. EL296UHV(X) units are available in heat­ ing capacities of 44,000 to …, This type has 2 numbers, a letter, followed by 2 numbers, two letters, and three digits. The first two digits are the day, the letter is the month, and the following two numbers are the year **in reverse**. Use the chart below to find the letter’s respective month of manufacture. For example, 12A56JK123 would be January 12, 1965., Reliable comfort, even in the toughest environments. When paired with your heat pump or air-conditioning system, the CBA27UHE’s Lennox ® Quantum™ coil handles the heat like no other. Its proprietary enhanced aluminum construction means that it operates reliably, even in the harshest conditions., High-efficiency, variable speed gas furnace. The EL296UH090XV48C uses a variable speed motor that reduces electrical use by two-thirds, compared to a standard motor. Plus, two stages of heating minimize temperature swings, so homeowners can save on utility bills without sacrificing comfort. Upflow/Horizontal. Energy Efficiency., • Applicable to indoor air handlers or gas furnaces with indoor add-on coils • Shipped completely factory assembled, piped and wired NOTE - When heat pumps are used with gas furnaces, a dual-fuel compatible thermostat or zone control system with dual-fuel capabilities must be used (order separately)., 50HZ T−Class Packaged Gas / Electric − 26 to 44 kW / Page 4. FEATURES AND BENEFITS. CONTROLS. Unit Controller Solid−state microprocessor−based control board that provides flexible control of cooling functions. All control voltage is provided via a 24V (secondary) transformer with built−in circuit breaker protection., I am definitely no "professional" HVAC tech. I am just a dude trying to fix my stuff. Use this info at your own discretion. My fix worked fine and is still..., 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 ..., Due to this, Lennox earns its place as our Best Overall pick, with an impressive 100/100 rating (or 5 out of 5 stars). Reviewing Lennox’s furnace lineup, we found a few models that stood out. For example, the ML196E is an excellent choice for its top-of-the-line efficiency ratings at an unbeatable price., HVAC units are identified by their multiple-character model number that identifies a particular type of unit. ... 4TT*** Unit Nomenclature. Short Description - Trane®, Split System Cooling (1½ - 5-tons) 4 1 T 2 T 3 B 5 3 6 0 7 36 8,9 1 10 000 11,12,13 A 14 A 15. 4TW*** Unit Nomenclature.