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50+ Years
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Emergency
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Expert HVAC Services in Rockville, MD
B & B Air Conditioning & Heating Service has been a trusted name in HVAC solutions since 1957, serving Maryland, Virginia, and Washington, D.C. Our team brings over 68 years of combined experience, operating with professionalism, honesty, and integrity in every project. We pride ourselves on being industry leaders through our in-house training institute, which has produced highly skilled technicians since 1991. Our 24/7 emergency services ensure immediate assistance for urgent HVAC needs, with same-day repairs available in most cases. As certified dealers for top brands like York, Carrier, Lennox, and Trane, we guarantee quality installations and repairs. Our commitment to excellence is reinforced by a 30-day repair guarantee and a 2-year installation warranty with complimentary maintenance agreements.

We maintain seven strategically located offices to better serve our community, offering flexible payment options and financing solutions. Our maintenance programs focus on preventing costly breakdowns through proactive care for heating, cooling, and indoor air quality systems. Customer satisfaction remains our top priority, as evidenced by our consistent focus on punctuality, clear communication, and technical expertise. With a proven track record of community investment and service innovation, we continue to set industry standards for HVAC excellence.
Services
HVAC Maintenance Heating Repair AC Installation Indoor Air Quality Emergency Service
Details
  • Year established: 1957
Highlights and features
  • We offer 68 years of combined HVAC industry experience across our team
  • Our technicians complete a rigorous 5-year in-house training program
  • We provide 24/7 emergency HVAC services with same-day repair availability
  • We maintain a 30-day repair guarantee and 2-year installation warranty
  • Our service fleet covers Maryland, Virginia, and Washington, D.C. regions
Associations and certifications
  • York
  • Carrier
  • Lennox
  • Trane
What people say
Arrived on time Very polite Explained everything Professional and courteous Quality work
Services
HVAC Maintenance
Our comprehensive HVAC maintenance program prevents costly breakdowns through expert inspections and tune-ups. Certified technicians service heating, cooling, and air quality systems using manufacturer-recommended procedures. Regular maintenance extends equipment lifespan while optimizing energy efficiency for residential and commercial properties.
Emergency Repair
Available round-the-clock for urgent HVAC issues, our emergency repair team responds promptly to critical system failures. Factory-trained technicians handle heating and cooling emergencies with same-day service prioritization across the DMV area.
AC Installation
We install energy-efficient air conditioning systems from leading brands including Carrier and Trane. Our certified installers ensure proper sizing and configuration for optimal cooling performance and energy savings in residential applications.
Heating Repair
Expert diagnosis and repair of heating systems including furnaces and heat pumps. Our technicians use advanced diagnostic tools to identify issues quickly, with same-day repairs available for critical heating failures during cold seasons.
Indoor Air Quality
Comprehensive indoor air quality solutions including filtration systems, humidity control, and ventilation upgrades. Our specialists address allergens, pollutants, and moisture issues to create healthier living environments in homes and offices.
Questions
What HVAC services do you offer?
We provide complete heating, cooling, and indoor air quality services including installation, repair, and maintenance for residential and commercial properties.
Are you available for emergencies?
Yes, our 24/7 emergency service responds to urgent HVAC issues with same-day repair availability across Maryland, Virginia, and Washington, D.C.
Do you offer financing options?
We provide flexible financing solutions for HVAC installations and major repairs through our dedicated financing program.
What maintenance plans are available?
Our maintenance agreements include regular system inspections, priority service scheduling, and labor cost savings for comprehensive HVAC system care.
How are your technicians trained?
All technicians complete our 5-year in-house training program covering advanced heat pump technology and manufacturer-specific installation protocols.