Lennox 12J1801 Expansion Valve TXV R410 w/Check Valve, 12J18 067U3414, TXV 1.5-2.5 Tons. Here is an old 1977 Lennox natural gas furnace tour. It is model # G8D2-82-3I made a video previously just on the startup, this one is more comprehensive.

Updated December 13, 2020

November 21, 2019

Lennox is a forward-thinking company that specializes in innovative technologies that maximize efficiency and minimize noise. With 20 different furnace models available and expert representatives, Lennox has consistently earned recognition as a brand of excellence. Read on to learn about the types of Lennox furnaces available, specifics on 10 of their top models, an overview of pricing and warranty options and what to look for in Lennox furnace reviews.

Types of Lennox Furnaces

Most Lennox furnaces run on gas, but some use oil instead. Within those two fuel types, different furnace models offer different features. Different models include variable speed, ultra-low emission, and two-stage furnaces.

Variable speed furnaces prevent large temperature fluctuations and reduce operating costs while providing consistent heating with lower humidity. Ultra-low emission Lennox furnaces burn away more NOx gases and result in cleaner emissions, healthier for you and the environment. Two-stage furnaces offer both high and low output settings that calibrate furnace heat flow to thermostat settings. Furnaces with constant torque motors offer improved efficiency while delivering greater comfort and cost savings.

Lennox Furnace Models

Lennox offers furnace options to fit various budgets, heating requirements, and energy-efficiency preferences. Below are the top 10 Lennox furnace models.

SLP98V

This energy-efficient Lennox furnace is the company’s flagship gas furnace and has an industry-leading AFUE rating of 98.7 percent. This heating system was named one of the most efficient Energy Star-certified products of 2019.

This quiet unit has two heat exchangers and condensing technology, which provides effective heat dispersement. The modulating valve and a variable-speed blower improve performance, and according to Lennox, the unit’s silicone nitride ignitor increases its durability and reliability. The system runs on natural gas and is compatible with the Lennox smart thermostat.

SL280V

This popular furnace has an AFUE rating of 80 percent. With two-stage heating and a variable-speed motor, this model provides efficient heating. The system uses Lennox’s proprietary SilentComfort technology, and sound-absorbing insulation further quietens operation. This natural-gas heating system is compatible with Lennox’s smart thermostat for automatic temperature control and remote access.

EL296E

This Lennox furnace has an AFUE rating of 96 percent, which means it converts 96 cents per dollar into useful heat. The efficient system uses two-stage heating and a constant-torque motor, which adjusts the airspeed according to demand. This heating system is dual-fuel capable, which means it can work with a heat pump to run on gas or electricity. The furnace improves air quality during summer by removing moisture.

EL296V

This energy-efficient furnace is a great deal. The unit has a 96 percent AFUE rating, which can save hundreds of dollars per year on energy bills. This gas furnace uses two heat exchangers and a variable-speed blower for enhanced comfort, humidity control and efficiency. The unit features sound-absorbing insulation and uses natural gas.

EL280

An energy-efficient model, this two-stage gas furnace adjusts its flame size to fit the heating demand, ensuring optimum heating while reducing energy costs. The unit has an AFUE rating of 80 percent, is dual-fuel capable and can be paired with a heat pump. This natural-gas furnace from Lennox features a fully insulated cabinet, which ensures quiet operation.

EL195E

This cost-effective, single-stage furnace has an exceptional AFUE rating, 95 percent, making it one of the most efficient furnaces in its class. The unit uses a power-saver constant-torque motor, which offers consistent heating and quiet operation. This furnace features sound-absorbing insulation and uses natural gas.

ML195

This budget-friendly furnace is also exceptionally energy efficient. This single-stage gas furnace boasts an AFUE rating of 95 percent. The system has two heat exchangers and a tightly sealed blower compartment. This natural-gas furnace is dual-fuel capable and can pair with a heat pump for peak efficiency.

ML193

Another economical furnace, this model does not compromise on performance or efficiency. The natural-gas furnace has an AFUE rating of 93 percent and uses two heat exchangers. The unit is dual-fuel capable and can pair with a heat pump to run using electricity.

ML180

This cost-effective gas furnace from Lennox has an AFUE rating of 80 percent. The furnace has a single heat exchanger and a robust blower assembly. This heating system runs on natural gas.

ELO183

This Lennox oil furnace has excellent heating capabilities. This cost-effective model has an AFUE rating of 83 percent. With a powerful combustion chamber and a heavy-duty fuel pump, this oil furnace offers reliable performance. Instead of natural gas, the unit uses diesel fuel oil.

Lennox Furnace Pricing

Factors like home size, installation cost, and furnace type all affect how much Lennox furnaces cost. Due to variables involved in the final cost, Lennox does not disclose individual unit prices. For the most accurate information on pricing, contact a local HVAC professional.

The baseline Lennox furnace price system splits into three tiers: from highest to lowest, the Dave Lennox Signature Collection series, the Elite series and the Merit series. The following table includes the warranty pricing extensions that Lennox offers for each tier.

Lennox Furnace Warranties

Basic Limited Warranties:

• Dave Lennox Signature Series
  • 10 years on covered components
  • 10 years on compressor
  • 20 years or limited lifetime on the heat exchanger (model dependent)
• Elite Series
  • Five years on covered components
  • 10 years on compressor
  • 20 years or limited lifetime on the heat exchanger (model dependent)
• Merit Series
  • Five years on covered components
  • Five years on compressor
  • 20 years on heat exchanger

Extended Warranties:

• Parts
  • Extends warranty for Lennox furnace parts on some Merit and Elite models up to 10 years from the standard five.
• Heat Exchangers
  • Enhances the heat exchange warranty into a limited lifetime warranty for the Merit series ML195DF and ML195UH.
• Mini-Splits
  • Augments limited warranty and extends coverage for five years on Lennox furnace parts and seven years on compressors.

Lennox Furnace Reviews

For an in-depth perspective of each model, you can read customer reviews to see how satisfied homeowners are with their Lennox furnaces. When researching reviews, keep an eye out for information about reliability, energy efficiency, installation costs and heating evenness.

Frequently asked questions

Lennox Furnace Parts Manual

How much does a Lennox furnace cost?

Price varies by model, the size of your home and installation costs. As such, Lennox does not list specific prices on their furnaces. To get the most accurate estimate, speak to a local HVAC specialist.

Where can I buy a Lennox furnace?

You can choose your model and series through the Lennox website and speak to one of their sales representatives. You can also contact a local HVAC specialist who can obtain and install the furnace.

How long will a Lennox furnace last?

Lennox furnaces tend to last an average of 15-20 years.

• POST a QUESTION or COMMENT about where to find furnace or boiler installation and service or maintenance manuals and guides

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Lennox Manuals, parts lists, wiring diagrams for HVAC equipment:

Free downloadable manuals for Air Conditioners, Boilers, Furnaces, Heat Pumps. Here we provide free downloadable copies of installation and service manuals for heating, heat pump, and air conditioning equipment, or contact information for the manufacturers who can provide that information for nearly all major brands of HVAC equipment.

We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

Lennox Furnaces, Heat Pumps, Air Conditioners - Contact Information, Manuals, Data Tag Decoding - contact information

Free Lennox Furnace, Heat Pump, Air Conditioner Installation & Service Manuals, Wiring Diagrams, Parts Lists

Below we provide HVAC manufacturer contact information and direct links to free downloadable installation, service, and users manuals, focusing on hard-to-find manuals for older models or discontinued equipment. We also provide links to the manufacturer's current model lists and literature.

See LENNOX HVAC MANUALS & PARTS GUIDES Industries Air Conditioners, Furnaces, Heat Pumps , Manuals, Guides

To find a Lennox Dealer near you go to http://www.lennox.com/residential/ and enter your zip code in the box at the web page upper right corner,ORuse the links to Lennox at the left side of this web page (supplied by Google).

• Contact information for Lennox industries, in Dallas Texas:
  Lennox Corporation - 1-800-9-LENNOX (1-800-953-6669)
  2100 Lake Park Blvd.
  Richardson, TX 75080
  P.O. Box 799900
  Dallas, TX 75379-9900
  NAIC: 333415 Air Conditioning & Warm Air Heating Equipment & Commercial & Industrial Refrigeration Equipment Manufacturing; 333414 Heating Equipment Manufacturing, Except Warm Air Furnaces; 333994 Industrial Process Furnace & Oven Manufacturing; 336322 Other Motor Vehicle Electrical & Electronic Equipment Manufacturing; 42173 Warm Air Heating & Air Conditioning Equipment & Supplies Wholesalers

Also see Lennox data tag decoding information under the letter L

at DATA TAGS on AIR CONDITIONERS

• LINKS to OLDER, hard-to-find Lennox HVAC equipment manuals are provided at this website - LENNOX MANUALS & GUIDES - HVAC just below.
  

The Lennox Pulse furnace safety inspection is (or was) free, but if the furnace has to be cleaned in order to be inspected, the customer could be charged for the cleaning.

See Lennox PULSE FURNACE SAFETY WARNING .

At Technical Reviewers & References we provide more contact information, links to current model list information, product specifications, and installation/operation manuals

Lennox: free, downloadable Lennox Pulse Furnace User's Manuals and Service Manuals are listed just below:

• Safety: owners of older model Lennox Pulse Furnace heating equipment should also see Lennox PULSE FURNACE SAFETY WARNING - Lennox Pulse Furnace Safety Inspection/Warranty Program: Carbon Monoxide Warning
  That document describes carbon monoxide gas (CO) leak safety hazards on certain models of Lennox hot air heating furnaces and announces an inspection and recall/repair program for these systems.
  
• Lennox PULSE FURNACE SAFETY FAQs - web page
• Lennox PULSE FURNACE SAFETY WARNING - web page
  See also HEAT EXCHANGER LEAKS for more information about heat exchanger leaks and furnace safety
  and
  See also CARBON MONOXIDE GAS TOXICITYfor information about carbon monoxide.


• Also see ARMSTRONG Air: Armstrong oil furnaces, Armstrong gas furnaces, Armsrtong heat pumps, packaged units & air handlers or coils
• Lennox AIR COOLED CHILLERS IO MANUAL [PDF] retrieved 2019/01/07 original source http://webmanuals.lennoxeurope.com/Current%20Products/Chillers/Water_cooled_chillers/MCW/Installation%20and%20op.%20manual%20%20(IOM)/CHILLER_AC-IOM-0105-E.pdf
• LENNOX CBX AIR HANDLER INSTALLATION MANUAL [PDF], Model: Dave Lennox Signature Collection CBX32MV Unit multi-Position Air Handlers (2011) retrieved 2018/07/31, original source: https://www.lennox.com/lib/legacy-res/pdfs/installation_maintenance/lennox_cbx32mv_iom.pdf
  Excerpt:
  This indoor unit is designed for installation with optional field−installed electric heat and a matched remote outdoor unit that is charged with HFC−410A refrigerant. These units, designed for indoor installation in multiple positions, are completely assembled for upflow and horizontal right−hand discharge before being shipped from the factory.
  All CBX32MV air handlers are equipped with a factory−installed, internally mounted check / expansion valve (CTXV), which is suitable for use in HFC−410A applications.
  This air handler is compatible with the ComfortSense® 7000 non−communicating thermostat and non−communicating outdoor units. In addition, this unit has the enhance capability of communicating with the icomfort Touch® thermostat and compatible outdoor units using the Lennox RSBus protocols.
• LENNOX CB31MV AIR HANDLER INSTALLATION MANUAL [PDF] (2008)
• LENNOX G12 / G12E SERIES FURNACE INSTALLATION MANUAL [PDF] using one of 3 types of fan limit controls: Camstat, Cemco, or Honeywell.
  See also HONEYWELL FAN LIMIT SWITCH WIRING and see also WIRING GUIDES for CAMSTAT, CEMCO, FIRESTAT FAN LIMIT CONTROLS
• Lennox G14 Pulse Gas Furnace User's Manual from 1990 #502.596M that supercedes Lennox 502.207M
• Lennox GSR14 Pulse Gas Furnace User's Manual from 1990, Lennox# 502.595M that supercedes Lennox 502.206M
• Lennox G21Q and G21V Lennox Pulse Gas Furnace User's Manual from 1996, Lennox #503.072M that supercedes the 1996 edition. Lennox Industries, Dallas TX
• Lennox GSR21Q and GSR21V Lennox Pulse Gas Furnace User's Manuals from 1998, supercedes the 1996 manuals, Lennox # 503.073M
• Lennox GSR21Q Lennox Pulse Furnace Manual from 1991, Lennox # 502.694M 8/91
• LENNOX G12 / G12E SERIES FURNACE INSTALLATION MANUAL [PDF] using one of 3 types of fan limit controls: Camstat, Cemco, or Honeywell.
• Lennox G12, G12R & G12X Series GAS FURNACE MANUAL [PDF] (8/1990)
  
• Lennox G12-G12E FURNACE MANUAL [PDF] (10/1987) Gas Furnaces
• Lennox G24-200 Series Upflow Gas Furnace Manual, Lennox # 503.614M,1998
• Lennox G26 Series Gas Furnace Manual, 1998, #503.533M
• Lennox G32V Series Gas Furnace Manual, 2001, #504.391M
• Lennox G32Q/V Series Gas Furnace Manual, 2001, #504.392M
• Lennox G40DF (X) Series Gas Furnace User's Information Manual, 2001, #504.322M
• Lennox G50DF(X) Series Gas Furnace User's Information Manual, 2001, #504.324M
• Lennox G60 DF(X) Series Gas Furnace INSTALLATION INSTRUCTIONS [PDF] (05/2009)
• Lennox G60DFV(X) Gas Furnace Manual, 2002, #504.577M
• Lennox G61MP Series Gas Furnace Manual, 2003, #504.741M
• Lennox G81 Gas Furnace Manual [PDF] 6 pages
• Lennox RFC AIR CONDITIONING SYTSEM COOLING UNITS [PDF] (1965)
• Lennox ROOFTOP UNIT IOM MANUAL BALTIC SERIES [PDF] Valid only for rooftop AC units displaying one of these codes: : GB IR GR DA NO FI IS BCK 02
  - BCK 025- BCK 030- BCK 035- BCK 040- BCK 045- BCK 050BHK 020 - BHK 025- BHK 030- BHK 035- BHK 040- BHK 045- BHK 050BGK 020 - BGK 025- BGK 030- BGK 035- BGK 040- BGK 045- BGK 050BDK 020 - BDK 025- BDK 030- BDK 035- BDK 040- BDK 045-BDK 050 IOM-RT B/0803-E
  retrieved 2019/01/07 original source https://www.c-o-k.ru/library/instructions/lennox/kondicionery-promyshlennye/8628/25428.pdf
• Lennox 78UGF Series Gas Furnaces, User's Information Manual, 1993, supercedes the 1992 edition, Lennox # 502.840M
• Lennox 78RGF Series Gas Furnaces, User's Information Manual, 1993, supercedes 1992, #502.842M
• Lennox 90UGF Series Gas Furnace User's Information Manual, 1997, Lennox # 503.629M
• Other Lennox owners manuals for air conditioners, air handlers, furnaces, heat pumps, indoor air quality systems, packaged units, water heaters, zone controls and other controls such as thermostats, are provided by Lennox at http://www.lennox.com/support/manuals.asp
• Lennox Corporation, 'ELITE® Series R-410A AIR CONDITIONERS INSTALLATION & OPERATION MANUAL' [PDF] (2017), retrieved 2017/07/09,original source: https://www.lennoxpros.com/docs/Technical/210758.pdf
• Lennox Corporation, 'INSTALLATION INSTRUCTIONS, Elite® Series XC13 Units, Condensing Units 506635-01' [PDF] (09/2011), extensive 126 page manual, retrieved 12/2/2014, original source: https://www.lennox.com/pdfs/installation_maintenance /Lennox_XC13_IOM.pdf
• LENNOX PULSE FURNACES 2 IDI's and 2 Complaints [PDF] (US CPSC), 5 June 1998, includes CPSC records obtained by a law firm under the FOIA Freedom of Information Act. This information includes description of gas odors, detection of gas leaks, and potential safety hazards that could be helpful to other consumers and service technicians.
• FORCED HOT AIR FURNACES: Troubleshooting and Repair, Roger Civi, ISBN-13: 978-0071341714, available at the InspectAPedia bookstore (Amazon.com) new and used. (We recommend a number of heating system inspection, diagnosis, and repair books at this Amazon page).
• Lennox Signature® Collection CBX40UHV AIR HANDLER UNIT MANUAL [PDF] (2016) Lennox Industries, Dallas TX USA retrieved 2019/11/13, original source: https://resources.lennox.com/fileuploads/a1cfea55-845e-427e-ab0d-57bbcfecd3e5Lennox_CBX40UHV_IOM.pdf
• LENNOX Dave Lennox Signature Collection XC15 UNIT INSTALLATION INSTRUCTIONS [PDF] (2008), Lennox Industries, Inc.
• Lennox SL-280 SERIES FURNACE MANUAL [PDF] (2017) Users Innformation Manual for the SL280UHNV Series induced draft gas furnaces.
• LENNOX XC15 SERIES SPLIT SYSTEM CONDENSER UNIT SERVICE MANUAL [PDF], (2006) Lennox Industries Inc.
  Description: The XC15 is a high efficiency residential split−system condensing unit, which features a scroll compressor and R−410A refrigerant. Units are available in 2, 2−1/2, 3, 3−1/2, 4 and 5 ton sizes. The series is designed for use with an expansion valve only (approved for use with R−410A) in the indoor unit.
  This manual is divided into sections which discuss the major components, refrigerant system, charging procedure, maintenance and operation sequence. Information contained in this manual is intended for use by qualified service technicians only. All specifications are subject to change.
• LENNOX XC15 SERIES SPLIT SYSTEM CONDENSER UNIT WIRING DIAGRAM [image file]
• LENNOX XC21 INSTALLATION INSTRUCTIONS (outdoor unit) [PDF] Dave Lennox Signature Collection XX21 system (2012)
• Lennox Corporation - Current Use and Care Manuals - Installation & Service manuals for current Lennox equipment: air conditioners, air handlers, furnaces, heat pumps, indoor air quality, packaged units, water heating units, zoning products, and equipment controls. Current Lennox documents are at this link: http://www.lennox.com/support/manuals.asp and include this equipment:
  Air Conditioners - - * HS21 Series * HS25 Series * HS26 Series * HS27 Series * HS29 Series * HSXA12 Series * HSXA15 Series - - Air Handlers - - * CB29M/CB30M Series * CB31MV Series * CBX32V/CBX32 Series * CBX32MV/CBX32M Series - - Furnaces - - * 90UGF Series * G24-200 Series * G24M Series * G24M 50Hz Series * G26 Series * G32 Series * G32V Series * G40DF Series * G40UH Series * G43 Series * G50DF Series * G50UH Series * G50i Series * G51 Series * G60DF(X) Series * G60DFV(X) Series * G60UH Series * G60UHV Series * G61 Series * G61V Series * GHR26 Series * GHR32Q & GHR32V Series * HS29 Series - - Heat Pumps - - * HP25 Series * HP29 Series * HPXA12 Series * HPXA15 Series - - Indoor Air Quality - - * PureAir Air Purification System * WB2 & WP2 Humidifier * Healthy Climate Products * PMAC * Germicidal Lights - - Packaged Units - - * 10GCS & 12GCS Series * GCS16, 20 & 20R Series * GCS29 Series * 13GCSX Series * 15GCSX Series - - Water Heating Units - - * CompleteHeat (HM30) * CompleteHeat (HM30) LP * Aqua Plus (RWH21/CB30MWH) - - Zoning Products - - * Harmony Series * Harmony II® Series * Harmony III® Series - - Controls - - * ComfortSense 7000 Series Touchscreen Thermostat * ComfortSense 5000 Series Touchscreen Thermostat * ComfortSense 3000 Series Programmable Thermostat * ComfortSense 3000 Series Non-Programmable Thermostat * SignatureStat * Elite Touchscreen * Merit Programmable Thermostats * Merit Non-Programmable Thermostats * LZP-2 * LZP-4 -
• Lennox Corporation - Archived Lennox Documents at this link: http://www.lennox.com/support/archived-docs.asp contains links to service and installation manuals for older equipment no longer sold by the company, and includes: (Most of these are downloadable free here)
  Lennox Installation and Operation Instructions - - Air Conditioners * 10 ACB Installation and Operation Instructions Manual * 10 ACC Installation and Operation Instructions Manual * 12 ACB Installation and Operation Instructions Manual * 13 ACC Installation and Operation Instructions Manual * HS14 Installation and Operation Instructions Manual * HS18 Installation and Operation Instructions Manual * HS19 Installation and Operation Instructions Manual * HS20 Installation and Operation Instructions Manual - - Heat Pumps * 10 HPB Installation and Operation Instructions Manual * 12 HPB Installation and Operation Instructions Manual * HP14 Installation and Operation Instructions Manual * HP16 Installation and Operation Instructions Manual * HP18 Installation and Operation Instructions Manual * HP19 Installation and Operation Instructions Manual * HP20 Installation and Operation Instructions Manual * HP22 Installation and Operation Instructions Manual * HP23 Installation and Operation Instructions Manual * HP24 Installation and Operation Instructions Manual * HPXA19 Installation and Operation Instructions Manual - - Homeowner's Manuals - - Furnaces * 78RGF Series Homeowner's Manual * 78UGF Series Homeowner's Manual * 80UHG Series Homeowner's Manual * Efficiency Plus Series Homeowner's Manual * F8AUH Series Homeowner's Manual * G12 Series Homeowner's Manual * G14 Series Homeowner's Manual * G16(R) Series Homeowner's Manual * G17 Series Homeowner's Manual * G17RSeries Homeowner's Manual * G20 Series Homeowner's Manual * G20R Series Homeowner's Manual * G21Q & G21V Series Homeowner's Manual * G23 Series Homeowner's Manual * G25MV Series Homeowner's Manual * G27M Series Homeowner's Manual * G41UF Series Homeowner's Manual * GH19 Series Homeowner's Manual * GSR14 Series Homeowner's Manual * GSR21Q & GSR21V Series Homeowner's Manual - - Air Conditioners * HS32 Series Owner's Manual * HSXA19 Series Owner's Manual - - Heat Pumps * HP21 Series Owner's Manual * HP26 Series Owner's Manual * HP27 Series Owner's Manual * HP32 Series Owner's Manual

Also see MAGIC PAK HVAC Packaged heating & cooling systems

On 2016-06-08 by trevor - age of my Lennox

whats the age of my lennox g8-110t-1a

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