Business Details
50+ Years
experience
Emergency
services
Trusted HVAC Services in Lexington Park
Since 1972, Great Mills Heating & Air Conditioning has been a trusted provider of HVAC services in Southern Maryland. Our family-owned business combines decades of experience with a commitment to excellence, offering repair, installation, and maintenance solutions tailored to local climate challenges. Our NATE-certified technicians deliver personalized service, emphasizing energy efficiency, customer education, and 24/7 emergency support.We prioritize transparent communication, competitive pricing, and long-term relationships built on reliability and technical expertise. Our work is backed by warranties, and we actively engage in community-focused practices, ensuring homes remain comfortable year-round through innovative HVAC solutions.
Services
AC Repair
Furnace Repair
Heat Pumps
Indoor Air Quality
Mini-Splits
Water Heaters
Geothermal Systems
Details
- Year established: 1972
Highlights and features
- Same-day service available for urgent needs
- 100% free quotes for all services
- 24/7 HVAC emergency repair availability
- Licensed, insured technicians with local expertise
- Flexible financing options for major projects
Associations and certifications
- NATE-certified
What people say
Excellent service
Professional technicians
Quick emergency response
Reasonably priced
Same-day scheduling
Services
AC Repair
Our AC repair services address issues like refrigerant leaks, thermostat malfunctions, and electrical failures. We provide 24/7 emergency support and same-day scheduling for Lexington Park residents. Technicians use advanced diagnostics to restore cooling efficiency, reduce energy costs, and extend system lifespan while adhering to Maryland's energy regulations.
Heat Pumps
We install and service energy-efficient heat pumps optimized for Southern Maryland's climate. Our solutions include variable-speed models for cold weather performance and geothermal systems. Technicians ensure proper sizing, defrost cycles, and humidity management to maintain comfort while qualifying for state energy rebates and utility incentives.
Furnace Repair
Our furnace services cover gas, oil, and electric systems with burner replacements, blower motor repairs, and thermostat recalibration. We prioritize safety inspections and efficiency improvements to handle Maryland's winter demands. Emergency repairs are available 24/7 with upfront pricing and manufacturer warranty compliance.
Indoor Air Quality
We enhance indoor air quality through advanced filtration systems, humidity control, and duct sanitization. Solutions address allergens, mold, and pollutants exacerbated by Chesapeake Bay humidity. Services include HEPA filters, UV purification, and ventilation upgrades to meet health standards and improve respiratory comfort for Maryland homeowners.
Geothermal Systems
Our geothermal installations leverage underground temperature stability for year-round heating and cooling. We design closed-loop systems tailored to Southern Maryland's soil conditions and home sizes. Services include site assessments, permit acquisition, and performance optimization to achieve 40-60% energy savings compared to traditional HVAC while complying with state environmental regulations.
Questions
Do you offer 24/7 emergency HVAC services?
Yes, we provide 24/7 emergency repair services for urgent heating and cooling issues in Lexington Park and surrounding areas.
Are financing options available for HVAC installations?
Yes, we offer flexible financing plans through trusted partners to make system upgrades more accessible for Maryland homeowners.
What HVAC maintenance plans do you offer?
We provide residential and commercial maintenance agreements including bi-annual inspections, priority scheduling, and labor warranties for systems in Southern Maryland.
Can you service all HVAC brands and models?
Our NATE-certified technicians are trained to service all major HVAC brands and models, including older systems in St. Mary's County.
Do you provide free estimates for HVAC services?
Yes, we offer 100% free estimates for all repair, installation, and replacement services with no-obligation consultations.
