Business Details
36 Years
experience
Emergency
services
Trusted HVAC & Plumbing Services in Sterling, VA
Donmar Heating, Cooling & Plumbing Heating, Cooling & Plumbing has been a trusted provider of HVAC and plumbing services in Northern Virginia, Maryland, and Washington D.C. for over 30 years. Founded in 1990, our company has built a reputation for delivering high-quality, customer-centric solutions tailored to residential needs. Our team of NATE-certified technicians and licensed plumbers combines extensive experience with ongoing professional development to ensure cutting-edge service. As a Carrier Factory Authorized Dealer, we uphold the highest industry standards for installation and maintenance.We prioritize energy efficiency and green technology, offering rebates and financing options to make sustainable upgrades accessible. Our commitment to transparency, flat-rate pricing, and 24/7 emergency services has earned us recognition from both customers and industry partners. With over 19,500 satisfied clients, we continue to grow through referrals, reflecting our dedication to reliability, honesty, and community-focused service.
Services
HVAC Repair
Furnace Installation
Water Heater Services
Plumbing Repairs
Indoor Air Quality
Emergency Services
AC Maintenance
Details
- Year established: 1990
Highlights and features
- Over 30 years of experience serving Northern Virginia and Maryland
- NATE-certified technicians for industry-leading expertise
- Energy-efficient solutions with available tax credits and rebates
- 24/7 emergency services for urgent HVAC and plumbing needs
- Transparent flat-rate pricing with financing options
Associations and certifications
- Carrier Factory Authorized Dealer
- NATE Certified
What people say
Outstanding customer service
Efficiently and effectively
Honest recommendations
Uniformly fantastic employees
Attentive to concerns
Services
HVAC Repair
Our NATE-certified technicians provide prompt HVAC repairs for heating, cooling, and air quality systems. Using advanced diagnostic tools, we resolve issues like refrigerant leaks, thermostat malfunctions, and electrical failures. With 30+ years of experience, we ensure reliable fixes that restore comfort and extend system lifespan.
Furnace Installation
We specialize in energy-efficient furnace installations tailored to home specifications. Our Carrier Factory Authorized expertise guarantees proper sizing, optimal performance, and compliance with industry standards. Upgrades include smart thermostat integration and heat loss calculations for maximum efficiency and cost savings.
Water Heater Services
From tankless conversions to emergency repairs, our licensed plumbers handle all water heater needs. We service gas, electric, and hybrid systems, addressing sediment buildup, heating element failures, and pressure issues while ensuring safety and code compliance.
Plumbing Repairs
Our comprehensive plumbing services include leak detection, pipe repair, and fixture installation. Technicians address frozen pipes, sump pump failures, and gas line issues using modern techniques to minimize disruption and prevent future problems in Northern Virginia's climate.
Indoor Air Quality
We improve home air quality through UV germicidal lamps, HEPA filters, and energy recovery ventilators. Solutions target allergens, pet dander, and humidity issues, creating healthier environments while enhancing HVAC efficiency and reducing allergy symptoms.
People
Donald Wills
President
Donald Wills leads Donmar Heating, Cooling & Plumbing Heating, Cooling & Plumbing with over 30 years of industry experience. He emphasizes customer service excellence, energy efficiency, and community trust while maintaining Carrier Factory Authorized standards.
Questions
How often should I service my HVAC system?
Service HVAC systems twice yearly for optimal performance and longevity.
What are signs my AC needs repair?
Weak airflow, strange noises, and increased energy bills indicate AC issues.
Do you offer emergency HVAC services?
Yes, we provide 24/7 emergency repair services for urgent needs.
Can I improve furnace energy efficiency?
Yes, through regular maintenance, programmable thermostats, and duct sealing.
What financing options are available?
We offer flexible financing plans for HVAC replacements and major repairs.
Are your technicians certified?
All technicians are NATE-certified and undergo ongoing professional training.
