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Frequently Asked Questions

Frequently Asked Questions

Lennox Heating Systems

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

What is Precise Comfort™ technology?

What is AirFlex™ technology?

The SLP98V furnace claims to be the "most efficient and quietest furnace you can buy." Other furnace manufacturers make similar claims. Whose claim do I believe?

Every time my current furnace cycles on, I hear a rush of air that's so loud, it wakes me from my sleep. Does the SLP98V solve that problem?

Does the SLP98V work in a dual-fuel application?

Can the SLP98V help reduce contaminants in my home's air?

What is a heat pump?

What is two-stage heating?

Can I use my chimney with my new furnace?

What are furnace ratings?

Furnaces are rated by the Annual Fuel Utilization Efficiency (AFUE) ratio, which is the percent of heat produced for every dollar of fuel consumed.

Like the miles-per-gallon rating on your automobile, the higher the AFUE rating, the lower your fuel costs. All furnaces manufactured today must meet at least 78% AFUE. If your furnace is 10 – 15 years old, it very well may fall below the current furnace minimum and waste energy.

This doesn't mean that you should only select a furnace based on its AFUE rating. The efficiency rating is just one factor to consider when looking for a new furnace.

Furnaces use electricity to run fans and motors. The amount of electricity used varies greatly depending on the type of furnace. Be sure to check electricity usage prior to making a purchase decision.

What is SilentComfort™ technology?

What is a variable speed furnace?

Why should I zone my house?

Will my new furnace work differently than my old one?

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

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

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