Indoor Air · Controls
Thermostats & Zoning in Southern Maryland
The right thermostat makes any system easier to live with, and zoning lets upstairs and downstairs each get the temperature they need. We install, wire and set them up correctly.
4.9 on Google · 387 reviews
When it's time for an upgrade
An old dial or mercury thermostat
Upstairs is hot while downstairs is cold
A heat pump whose backup heat runs too often
You want to control your comfort from your phone
The thermostat screen is blank or unreliable
Book in about two minutes
Pick a day and an arrival window that works for you, or call the office Mon–Fri, 8 AM–5 PM.
What we install
- Smart and Wi-Fi thermostats
- Programmable thermostats
- Multi-zone dampers and zone panels
- Thermostats set up for heat pumps and dual-fuel
- Wiring repairs and new thermostat wire
Why Graves
Licensed, local and upfront
Licensed and insured under MD HVACR #01-21983. Serving Hollywood, Lexington Park, Leonardtown and all of Southern Maryland since 2012.
Upfront pricing
You approve every repair and its price before any work begins. No surprise fees.
No pushy sales
We recommend only what your system needs to run safely and well.
Free second opinions
Got a big quote from someone else? Send it to us and we'll give you an honest take.
Flexible financing
Spread the cost of a new system over convenient monthly payments.
Financing available.
Spread the cost of a new system over convenient monthly payments.