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Residential Gas Furnaces

One of the first things to consider when purchasing a gas furnace is its efficiency. This is indicated by the Annual Fuel Utilization Efficiency rating or AFUE. We offer a variety of highly efficient gas furnaces, ranging from 80% to 95% efficiency. We also offer variable-speed, two-stage and three-stage furnaces, which can greatly increase your comfort level.


Why 2-3 stage gas furnace?
As with all of the 2-stage or multi stage products the gas furnace does not need 100% of the heating most of the time. So the furnace runs in the first stages and only goes to full stage when needed, therefore increasing gas efficiency.

Why duel fuel?
Duel fuel is like a hybrid car if you will, a property with gas furnace(s) as its primary heat source has the available option of installing a heat pump instead of an a/c outside to create 2 fuel sources. This is a very efficient option and gives the property owner the opportunity to cycle between gas furnace and heat pump heat types. Go green and install a duel fuel system for the best of both worlds!

Why Variable Speed?
A normal system cycles on and off at the same speed, the variable speed indoor units start at half speed and give the opportunity for the coil to get ice cold and then ramp up to 1/2 speed and finally to full speed if needed. There is a time delay between each speed. The benefits are more even temperatures and up to 3-4 times more humidity removal in cooling mode than a single speed unit. Variable speed gives you quit, efficient comfort.

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Customer Reviews


Just a quick letter back to you. We are very very SATISFIED with the new Furnace/AC unit that you guys installed in June. I waited a little bit to see how things would work out with the new system, and it’s working fine. You have made me a believer of Trane Systems and J&S Air!!! Please give our name as a reference. The service that you guys did on our existing downstairs unit is appreciated too. It works even better now. Thank you again for being a very honest reputable company to deal with. - David


They’re the best! Their comfort consultant provided me with the information I needed to make my decision to chose their company and a Trane HVAC system. Their installers were very considerate and hard-working guys. I was contacted twice after the installation for follow-up and then after city inspection. I feel I received the best value and service for my dollar with J & S Air. I am very happy with my choice. Mike in Arlington


I worked with J & S Air last year. They are the only A/C company that has integrity and is honest in explaining exactly what your house needs. I interviewed other companies in which each cone tried to upsell me on units that I did not need. This is why I bought 3 new units for my new house which makes 5 i n the last year. My friend just put in 2 new units last week and the main reason is the comfort consultant explained everything corretly and sold them what their needs were.