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Simmons Heating & Air Company in Southern MD Is Here To Help

Simmons Heating and Air Conditioning in Southern Maryland, has been working hard for your business for more than 3 decades. Our clients in St. Mary’s County, Charles County and Calvert County have been and remain very important to us. Because of this, we’ve kept the same promises to our clientele: highly trained hvac and geothermal servicemen, the most technically advanced product lines, on-time delivery, and the very best customer service in the business. We’re committed to these promises.

About Us

Learn why Simmons Heating and Air Conditioning have best heating and cooling products and services in the industry, check out our corporate profile or the latest news, articles and tips.

Learn Our Heating & Cooling Co. Story


-Air conditioning
-Geo Thermal Systems
-Heat Pumps
-Mini Splits
-Maintenance Contracts

Heating and Air Company Services

Areas Served

Simmons Heating and Air Conditioning is proud to service the Southern Maryland Area for all your Heating repair and Air Conditioning needs. We offer highly trained services on the installation of gas, electric, oil, hot water Boilers and Geothermal systems. Please call us for any of your home comfort needs.

Southern Maryland
St. Mary's County
Charles County
Calvert County

HVAC Service Areas

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Contact us for RELIABLE, COMFORT-ENHANCING, installation and repairs to your heating and cooling system.


It's our gift to you. 

THIS "REMODELING AND INSTALLATIONS TOOLS" Book will help you experience home improvements in a fun and easy fashion. With these handyman secrets you'll learn to fix like a pro in no time.

What Our Customers Say...

5 star heating company review

“I can recommend Simmons Heating and Air Conditioning. He was here this morning to do my yearly tune-up on my system. He was here a month ago when I needed a new thermostat. And, they come out and they look at my generator that I’ve got.

They are excellent. They are probably one of the best and I’ve lived all over the country. The elderly couple that lived here before me used them, so I just carried on with them and they are great.  They are responsible and honest. I’ve had other service providers that came out and tried to take me for a ride. For the yearly tune-up, they come out and clean the system, the air conditioner and heater and all that. It is like a contract: you buy that and they come out once a year and they will do that, every year you pay that amount.  And then, if anything goes wrong, I get a 20% discount on any kind of service that is required. They have a habit of sending out the same guy, and he has been there for years. He used to take care of the elderly couple that had been here before me for quite a few years. He showed me to work the system; you don’t see that too often. They keep it on record when you call them up and they try to keep the same guy going to the same properties. They are familiar with the customer and they are familiar with the property. It is a good way of doing business. This guy doesn’t show up at your door without the booties they put on their feet—they respect your home.”

-Richard & Laura L.

5 star heating company review
I was so happy these guys were able to figure out hot to fix a cooling problem I have been having for a while. I was thrilled the job was completed quickly.

Superpages Review by jeffblue25

5 star heating company review

Came on time and the gentleman was very polite. The repairman shared some tips with us so that we can maintain our HVAC unit. He quickly did some troubleshooting and was able to get to the root of the problem. Our air was up and running again within about an hour and it didn’t cost an arm and a leg.

Superpages Review by lancastermclean

5 star heating company review

It seemed like my AC unit wasn’t cooling very well and these guys came out and fixed the problem right away. It was something small. Thanks. Glad I didn’t put it off any longer.

Superpages Review by sarajohnson464

5 star heating company review

We have been pleased with the competent and friendly service provided by Simmons Heating and A/C. The technicians are knowledgable and willing to address an issue quickly. We own a weekend home and frequently our service contractor has to enter the house when we are away. We appreciate their honesty.

Superpages Review by Guest66137

5 star heating company review

I have used simmons for years on my home and my rentals. They have always been great and taken care of my every need not just heating and air but my home generator as well. I have left them in my home while gone many times with no problems and i get discounts as a member. I will always use them for my needs.

Superpages Review by Guest38960

5 star heating company review

We were looking into getting a nwe heating and AC unit and they were very helpful when I called with all my questions. They were also reasonable priced based on some of the other quotes I got. When installing it they were very kind and…

City Search Review:  very helpful by Lisa S.