Lashars is your heating service company.  Whether you’re looking to repair, replace or maintain your heating system, we strive to be the most trusted service provider in Norman and the greater OKC area.

We are a preferred vendor for York and Carrier products, but Lashars professionally trained and certified technicians can maintain and service most brands of HVAC equipment including York, Armstrong, Bryant  Carrier, Coleman, Honeywell, Janitrol, Lennox, Payne, Rheem, Ruud, Trane, American Standard and many more. If another company has already been to your home and diagnosed a problem, fell free to call us for a free second opinion.

If you’re looking to upgrade or replace that aging system call us now for a free estimate. We partner with industry leaders to offer the highest quality equipment at the best possible price, and we have a 100% guarantee behind all of our service and installations. Our sales staff will do a complete energy audit on your home to ensure that your system is properly sized and installed.  We strive to set ourselves apart from the competition by carefully examining your needs, including the existing ductwork and condition of your home.  You can rest assured that Lashars will do everything possible to make your home as comfortable and efficient as possible.

There are many factors to consider when purchasing a new furnace.

Click here for information from Department of Energy.

Terms to consider:


Various methods are used to rate energy efficiency to help you compare energy costs.

– AFUE for furnaces (Annual Fuel Utilization Efficiency)
– SEER and HSPF for heat pumps (Heating Seasonal Performance Factor)
– Certain products have earned the Energy Star rating, which means that they are the most energy efficient and environmentally friendly units on the market. Look for Energy Star products to earn rebates and save maximum energy costs.


Thanks to variable speed technology, you get more effective air circulation that matches your level of comfort more efficiently and precisely.

Heating Products

Affinity™ Series Gas Furnaces 

Affinity™ Series gas furnaces come with advanced modulating burners and variable-speed blowers that can match your comfort level more precisely, plus the innovative ClimaTrak™ Comfort System to set furnace operation to suit your locale. The Best Buy seal is a registered trademark of Consumers Digest Communications, LLC, used under license.

YP9C Furnace  | YPLC Furnace 

LX Series Heat Gas Furnaces

LX Series furnaces fit your needs with select high efficiency models that reduce your utility bills and a compact 33-inch cabinet that easily fits in tight areas.

TM9M Furnace | TM9V Furnace | TM9T Furnace | TM9X Furnace | TM8V Furnace | TM8T Furnace | TM8X Furnace 

Latitude™ Series Gas Furnaces

Count on the high efficiency of the Latitude™ Series models to reduce your utility bills. Plus, the compact 33-inch cabinet will fit into your home with room to spare.

TG9S Furnace | TG8S Furnace