[1] The Merit series is the lowest cost Lennox air conditioner, and there are 4 models of Single-stage with a 13, 14, 15 or 16 Seasonal energy efficiency ratio (SEER) rating.

[1] The company offers a warranty of up to ten years [3] The Merit series is manufactured in Saltillo, Mexico, under the name LII United Products.

The Saltillo location allowed Lennox to serve the Sun Belt with lower cost of shipping the units.

Even though the Merit series is considered the budget line of Lennox air conditioners, it is still more expensive than most comparable models on the market.

[7] In 2022 Consumer Reports survey of members gave Lennox air conditioning units a top rating of Excellent.