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You will find brochures for most Lennox^® products in our archived documents section. If you need information on a model that isn’t listed, you can request literature by mail.

Frequently Asked Questions

Lennox Cooling Systems

Why is my system freezing up?

How does an air conditioner work?

What do all those air conditioner and heat pump ratings mean?

What is two-stage cooling?

What is variable speed technology and how does it apply to air conditioners?

What is the best thermostat to use for my cooling system?

How can I confirm the model and serial numbers for my cooling system?

What size equipment do I need for my home?

The only reliable way to determine the size that best matches the needs of your home is to have your local Lennox dealer perform a load calculation, which takes into account the square footage of your house, the insulation value of your windows, the amount of insulation in your walls and roof and many other factors.

What is a heat pump?

Why should I zone my house?

When replacing the outdoor unit, should the indoor unit also be replaced?