Lennox Manuals & User Guides

Lennox Industries is a premier provider of climate control products for the heating, ventilation, air conditioning (HVAC), and refrigeration markets. Founded in 1895 by Dave Lennox, the company has built a legacy of innovation and quality, delivering energy-efficient solutions for both residential and commercial applications.

Lennox offers a wide range of products designed to deliver precise comfort, including variable-capacity air conditioners, communicating smart thermostats like the S40, and advanced heat pumps capable of operating in extreme cold climates.

With a focus on sustainability and technological advancement, Lennox systems are engineered to improve indoor air quality and reduce energy consumption. The company supports its products with a robust warranty program and a vast network of professional dealers. Whether for a single-family home or a large commercial facility, Lennox provides reliable, high-performance HVAC equipment designed to maintain optimal environments efficiently.

• Where can I find manuals for my Lennox products?

  You can find manuals in the directory on this page, or visit the Lennox Owners Resource area on their official website for a comprehensive library of product literature.

• How do I register my Lennox product?

  Lennox products can be registered online via the Product Registration page on the Lennox website. Registration helps keep you up to date on product information and warranty offers.

• What is the customer support phone number for Lennox?

  You can contact Lennox customer support at 1-800-453-6669.

• What type of refrigerant do new Lennox systems use?

  Many newer Lennox systems, such as the Merit Series ML16KP2 and EL22KCV, utilize R-454B refrigerant, which has a lower Global Warming Potential (GWP).

• Where can I look up warranty information for my unit?

  Warranty coverage details can be found using the Warranty Lookup tool on the Lennox website, or by reviewing the warranty certificate included with your unit.