Lennox ML196 45,000 BTU Furnace

Get reliable, efficient home heating with the Lennox ML196 45,000 BTU gas furnace. Part of the Lennox Merit® Series, the ML196 combines up to 96% AFUE efficiency with dependable single-stage heating and a Power Saver™ constant-torque blower motor designed to provide efficient airflow for heating and cooling applications.

The ML196UH045XE36BK is the 45,000 BTU-class configuration, with an official rated input of 44,000 BTU/h and rated heating output of 43,000 BTU/h. This current ML196UHE(K) configuration is designed for residential upflow or horizontal installation and includes Lennox’s onboard refrigerant detection system (RDS) platform.

Key Features

Up to 96% AFUE Efficiency
The Lennox ML196 provides up to 96% AFUE efficiency, helping convert a high percentage of the fuel consumed into usable heat for your home.

Single-Stage Gas Heating
The ML196 uses a single-stage heating design for straightforward, dependable furnace operation.

Power Saver™ Constant-Torque Blower Motor
The Power Saver™ constant-torque DC brushless motor is designed for efficient airflow and can provide different programmed airflow levels for heating and cooling applications. Lennox identifies it as a high-efficiency constant-torque ECM motor.

Duralok Plus™ Heat Exchanger
The furnace uses a Lennox Duralok Plus™ heat exchanger assembly with a heavy-gauge aluminized-steel primary heat exchanger and a secondary condensing coil assembly.

SureLight® Silicon Nitride Ignitor
The SureLight® hot-surface ignition system uses a silicon nitride ignitor for reliable furnace ignition.

ENERGY STAR® Certified
The ML196UHE(K) product specifications identify the listed ML196 configurations as ENERGY STAR® certified.

Refrigerant Detection Ready
Models ending in K include Lennox’s refrigerant detection system platform for systems using R-454B refrigerant. The RDS system is designed to detect refrigerant and initiate protective system responses when required.

Upflow / Horizontal Installation
The ML196UHE(K) cabinet is designed for upflow, horizontal-left or horizontal-right applications without cabinet modifications.

Low-NOx Design
The X designation indicates the furnace meets the California nitrogen oxides standard of 40 ng/J, subject to applicable regional installation requirements.

Dual-Fuel Capable
When paired with a compatible Lennox heat pump and appropriate controls, the ML196 can operate as part of a dual-fuel heating system that switches between gas and electric heat.

Technical Specifications

Professional Installation Included

Your Lennox ML196 furnace includes professional installation by qualified HVAC technicians. Proper sizing, installation, venting, gas connections, electrical connections and system commissioning are important for safe operation and reliable performance.

Installation scope is subject to site conditions. Additional work may be required if existing venting, gas lines, electrical components, ductwork or other installation conditions require modification.

Warranty Coverage

20-Year Heat Exchanger Limited Warranty
Lennox lists a limited 20-year residential warranty for the Duralok Plus™ aluminized-steel heat exchanger, subject to the applicable Lennox warranty terms.

Up to 10-Year Parts Coverage
Lennox’s current ML196E product information states that covered components have a 5-year default warranty, with an opportunity to obtain a 10-year parts-only extension through applicable product registration and warranty terms.

1-Year Standard Labour Warranty
Jimmy HVAC provides a 1-year standard labour warranty for the installation, separate from the Lennox manufacturer’s warranty.

Manufacturer warranty coverage is subject to Lennox’s current warranty terms, registration requirements, exclusions and applicable conditions.

Why Buy the Lennox ML196 45,000 BTU Furnace?

• Up to 96% AFUE high-efficiency heating
• 45,000 BTU-class ML196 furnace
• 44,000 BTU/h rated input
• 43,000 BTU/h rated heating output
• Reliable single-stage heating operation
• Power Saver™ constant-torque DC brushless motor
• Duralok Plus™ aluminized-steel heat exchanger
• SureLight® silicon nitride ignition system
• ENERGY STAR® certified
• R-454B refrigerant detection-ready K configuration
• Upflow / horizontal installation capability
• Natural gas with LP/propane conversion capability
• Professional installation included
• 20-year limited heat exchanger warranty
• Up to 10-year parts coverage with applicable registration
• 1-year standard Jimmy HVAC labour warranty

What’s Included

• Lennox ML196 45,000 BTU-class gas furnace
• Professional furnace installation
• Standard installation labour
• System commissioning and testing
• 1-year standard Jimmy HVAC labour warranty

Frequently Asked Questions

What is the actual BTU input of the Lennox ML196 45,000 BTU furnace?

Lennox’s model numbering uses nominal capacity classes. The official rated input for the 45,000 BTU-class model ML196UH045XE36BK is 44,000 BTU/h, with rated heating output of 43,000 BTU/h.

How efficient is the Lennox ML196?

The ML196 is rated at 96% AFUE.

Is the Lennox ML196 single-stage?

Yes. The ML196 is a single-stage gas furnace with a Power Saver™ constant-torque blower motor.

Does the ML196 use a variable-speed blower?

No. The ML196 uses a high-efficiency constant-torque DC brushless ECM motor. It should not be described as a variable-speed furnace.

Does the ML196 have a 20-year heat exchanger warranty?

Yes. Lennox lists a limited 20-year residential warranty for the Duralok Plus™ heat exchanger, subject to the applicable warranty terms.

Is the ML196 ENERGY STAR® certified?

Yes. Lennox’s current ML196UHE(K) product specifications identify the listed configurations as ENERGY STAR® certified.

What does the K at the end of the model number mean?

The K designation indicates that the furnace contains an onboard refrigerant detection system (RDS) for systems using R-454B refrigerant.

Is installation included?

Yes. Professional installation is included with the Jimmy HVAC offer. Additional installation work may apply if the existing system requires modifications beyond standard installation.