Great Mills · St. Mary's County
New Heating & AC Systems in Great Mills, MD
Thinking about a new heating and cooling system for your Great Mills home? Compare options and get the price in writing.
4.9 on Google · 387 reviews
- 16
- system replacement installs in Great Mills
- 2
- in the last 12 months
- Jul
- busiest month here
- 7 mi
- from our Hollywood shop
New Heating & AC Systems in Great Mills, by the numbers
Our records for Great Mills go back to 2020. Since then we've done 16 system replacement installs here, 2 of them in the last 12 months; the latest was in April 2026.
July is when Great Mills needs new systems from us most.
We've also given 32 replacement estimates in Great Mills, free and with the price in writing before anything is decided.
What our recorded Great Mills installs put in: heat pumps (1), central AC (1) and oil heat (1).
Great Mills's system replacement installs by month: Jan 2, Feb 1, Mar 1, Apr 2, Jun 2, Jul 3, Aug 1, Nov 2, Dec 2.
Great Mills sits along Great Mills Road (Route 246), between Route 5 and Lexington Park.
How it works
We look at the house, the ductwork and what you have now, then put Silver through Platinum options side by side in writing.
SMECO pays up to $975 on a qualifying heat pump and $500 on central air; we've filed 2 of those rebates for Great Mills homes.
Program terms and funding apply.
Google reviews from Great Mills
What Great Mills neighbors say
I found RE Graves Heating & Air Conditioning via on-line search and very lucky to have found this company. Not only are they local, but very professional and prompt as well. After discussing my HVAC needs, RE Graves provided a professional estimate/proposal which was very competitive with other local companies. However, after agreeing on a price, my new HVAC system was installed within a week. The techs (Tommy & John) that came to my house to install the system were very knowledgeable, professional, and personable. I would recommend RE Graves to anyone who desires high quality at a great price!