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Business Details
50+ Years
experience
Trusted HVAC Parts and Equipment Supplier in Landover, MD
Founded in 1946 by Henry M. Sweeny, our company has served contractors, property managers, and government entities across the Mid-Atlantic region for over seven decades. We specialize in distributing HVAC parts, equipment, and related products while offering industry-specific training through our HVAC Academy. Our acquisition of Larson Supply and ABC Motors expanded our capabilities to include comprehensive solutions for multi-family housing maintenance and installation. With two locations in Landover and Rockville, Maryland, we combine extensive product availability with personalized service, ensuring customers receive both technical expertise and tailored support.

Our commitment to quality education and products has fostered long-term relationships built on trust and mutual success. We pride ourselves on maintaining a team of knowledgeable professionals who deliver efficient solutions for even the most challenging HVAC needs. Through continuous adaptation to industry advancements, we remain a reliable partner for contractors seeking dependable supplies and expert guidance. Our history of community engagement and customer-centric approach underscores our position as a trusted leader in the HVAC distribution sector.
Services
HVAC Equipment HVAC Parts Refrigerants Testing and Measurement Condensate Management Recovery Vacuum Charging Chemicals Hand Tools Jobsite Accessories Jobsite Protection
Details
  • Year established: 1946
Highlights and features
  • 70+ years of specialized HVAC distribution experience
  • In-house HVAC Academy for industry professional training
  • Comprehensive inventory covering all HVAC needs
  • Personalized service from knowledgeable technical experts
  • Proven track record with government and commercial clients
What people say
Go-to supply house Great experience Best place Knowledgeable people Sharp and knowledgeable
Services
HVAC Equipment
We distribute complete HVAC systems including air conditioning units, heating equipment, and ventilation solutions for residential and commercial applications. Our inventory covers all major brands and specifications to meet diverse installation requirements. Technical support ensures proper system selection and component compatibility for optimal performance.
HVAC Parts
Our comprehensive parts inventory includes replacement components for all HVAC system types, from standard filters to specialized electrical parts. We maintain stock of both common and hard-to-find items to minimize equipment downtime. Expert staff assist with part identification and application-specific recommendations.
HVAC Training
The HVAC Academy provides hands-on training programs covering system installation, maintenance, and repair techniques. Courses combine theoretical knowledge with practical application for industry newcomers and experienced technicians. Certification programs help professionals meet licensing requirements and stay current with technological advancements.
Refrigerants
We supply EPA-certified refrigerants in various types and container sizes for residential, commercial, and industrial HVAC systems. Proper storage and handling guidance ensures compliance with environmental regulations. Technical data sheets and safety information accompany all refrigerant purchases.
Testing Equipment
Our selection includes pressure gauges, thermometers, leak detectors, and other diagnostic tools essential for HVAC system maintenance. We offer both basic and advanced testing equipment from trusted manufacturers. Staff provide usage guidance and calibration recommendations to ensure measurement accuracy.
Questions
What HVAC products do you carry?
We stock complete HVAC systems, replacement parts, refrigerants, testing equipment, and safety gear from leading manufacturers for both residential and commercial applications.
Do you offer HVAC training programs?
Yes, our HVAC Academy provides hands-on training courses covering system installation, maintenance, and repair techniques for industry professionals at all experience levels.
How long have you served the Mid-Atlantic region?
We've provided HVAC solutions since 1946, supporting contractors and property managers across Maryland, Washington D.C., and surrounding areas for over 75 years.
What are your store hours?
Our Landover and Rockville locations operate Monday-Friday 7:30am-4:30pm and Saturday 8:00am-11:30am. We're closed Sundays.
Can you help locate hard-to-find parts?
Yes, our experienced staff specializes in sourcing difficult-to-find HVAC components and can typically locate specialized parts within our extensive distribution network.