HVAC

Comprehensive HVAC Inspection, Repair & Installation Services in Northern VA

At C.D. Shanahan’s, we’re your trusted local experts for all things HVAC. Our team offers comprehensive heating, cooling, and indoor air quality services designed to keep your home or business comfortable throughout the year. With a 5-star reputation built on honesty, reliability, and customer satisfaction, C.D. Shanahan’s is committed to providing the comfort and reliability you deserve.

Heating

Keep your home or business warm and comfortable all season long.

Air Conditioning

Stay cool and enjoy reliable comfort in every room of home or business.

Furnaces

Efficient furnace solutions to heat your home safely and evenly.

Boilers

Dependable boiler services for consistent, energy-efficient heat.

Radiators

Repair, replace, or maintain radiators for smooth, steady warmth.

Air Purification Systems

Breathe cleaner, healthier air with advanced filtration- Airzap.

Humidifiers

Improve indoor air quality and comfort with balanced humidity.

Gas Fireplaces

Add warmth and style with safe, efficient gas fireplace service.

Duct Cleaning

Professional Duct Cleaning to Enhance Indoor Air Quality and HVAC Efficiency

Duct Sealing

Duct Sealing Specialists Helping Improve HVAC Efficiency and Indoor Comfort

WHAT WE DO

Delivering trusted solutions reliable heating & cooling

Expert Heating Services

Providing fast, safe, and efficient heating solutions tailored

Reliable Climate Control

Providing fast, safe, and efficient heating solutions tailored

COOLING ASSURANCE

Breathe easy with perfect climate control

Enjoy clean, cool air tailored to your lifestyle.Our advanced systems ensure consistent comfort all year round.Let Coolify handle the heat—so you can relax and breathe easy.

Customer Satisfaction

On-Time Service

System Efficiency

What Our Clients Say

Read Why We Come Highly Recommended

    
 
 
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   Scott dowling 
 
 
 
 Trustindex verifies that the original source of the review is Google. Izaiah was great. Professional and knowledgeable. Kept me updated and knocked it out. Bravo!!
  
 
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   Mark's Pub 
 
 
 
 Trustindex verifies that the original source of the review is Google. Awesome quick service. Nicest trustworthy guys you will ever deal with.
  
 
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   Douglas Churchjr 
 
 
 
 Trustindex verifies that the original source of the review is Google. 
  
 
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   Adela Gernandt 
 
 
 
 Trustindex verifies that the original source of the review is Google. 
  
 
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   Jack Hiatt 
 
 
 
 Trustindex verifies that the original source of the review is Google. 
  
 
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   Larry Hartley 
 
 
 
 Trustindex verifies that the original source of the review is Google. CD Shanahan quickly responded to my air conditioner failure to diagnose, order parts and install. I extremely pleased with the technician’s who diagnosed the problem and then remove and replaced the failed compressor. The technician’s were extremely professional and pleasant during all phases of the repair process. The customer representative was pleasant and responsive each timeI called. I am very happy with all aspects of interaction and service from CD Shanahan company and highly recommend them to anyone who needs service.
  
 
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   Unell Hobbs 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very efficient, friendly and professional. Thanks for a very thorough job. Elijah is wonderful!
  
 
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   john roros 
 
 
 
 Trustindex verifies that the original source of the review is Google. In the last year we needed to replace our HVAC and our water heater just failed.  They were very responsive and quickly replaced our units.  Everyone from the office to the technicians are very professional and friendly.  The technicians were very respective of our home ensuring to clean up  and protect our floors.
  
 
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   CPM (CPM) 
 
 
 
 Trustindex verifies that the original source of the review is Google. Duncan arrived exactly on time for a plumbing issue.He quickly diagnosed the problem and had the issue fixed in less than a half hour. Grateful for his and the company's service..highly recommend.
  
 
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   Holly Marinkovich 
 
 
 
 Trustindex verifies that the original source of the review is Google. Elijah was very thorough, replaced our humidifier filter.

FAQ's

Dedicated experts behind every cool solution

Our team of certified technicians brings years of hands-on experience and in-depth knowledge to every job. From precise diagnostics to efficient.

What are the signs that my AC needs repair?