Addison
Dedicated Outdoor Air Systems (DOAS)
Addison is a leading manufacturer of commercial HVAC solutions specializing in Dedicated Outdoor Air Systems. This allows for optimizing both temperature and humidity levels before distributing the conditioned air into the building. Their flexible product offerings can be customized to meet unique project requirements, helping customers achieve efficient, long-lasting HVAC solutions. With decades of industry experience and strong technical support, Addison is a trusted partner for engineers, contractors, and building owners.
The Experience Behind Every Recommendation
Behind every equipment solution is Havtech’s own established legacy of commercial HVAC expertise, driven by our decades of experience, extensive project history, and trusted industry relationships.
Product Categories
Products That Fit Your Needs
PR Series Packaged Systems
The Addison PR Series is a versatile outdoor air system with a wide range of sizes and configurations, providing efficient ventilation, dehumidification, and customizable solutions for retail, office, hospitality, and other commercial applications.
AK Series Compact DOAS
The Addison AK Series is a compact, versatile dedicated outdoor air system available in sizes from 3–90 tons, offering flexible installation options and a space-saving footprint ideal for retail, office, hospitality, and other commercial applications.
SC/SA Series Split System
The Addison SC/SA Series is a flexible split system solution for ventilation and dehumidification, featuring a modular design that adapts to tight spaces and supports both vertical and horizontal configurations for a wide range of commercial applications.
PR*Q Series
The Addison PR*Q Series is a high-efficiency dedicated outdoor air heat pump that combines advanced controls, durable construction, and flexible configuration options to deliver reliable ventilation and dehumidification for demanding commercial applications.
Cooling Distribution Units
Addison’s Cooling Distribution Unit (CDU) provides customizable, high-efficiency precision cooling for mission-critical environments, ensuring reliable temperature control, scalability, and operational performance for high-density applications.
What You Get When You Work With Us
Combining Addison’s expertise in ventilation, humidity control, and DOAS technology with Havtech’s local engineering and sales support gives customers confidence from design through operation. Each team provides equipment selection assistance, application guidance, technical support, and retrofit recommendations to help ensure every system meets the unique needs of the building. By coordinating with engineers, contractors, owners, and facility teams, we deliver solutions that improve indoor air quality, energy performance, and occupant comfort for years to come.
Find Your Local Partner
Proudly Representing Across the Region
Havtech partners with manufacturers to deliver innovative solutions across the Mid-Atlantic and beyond. With dedicated regional offices and expert teams, we bring industry-leading products and responsive support closer to you – wherever your projects take place.
10025 Lickinghole Road
Ashland, Virginia 23005
1101 Hampton Park Blvd.
Suite 400
Capitol Heights, Maryland 20743
Call Capitol Heights Parts Counter & Warehouse at (443) 636-9210
9505 Berger Road
Columbia, Maryland 21046
Applications and Industries
Designed for the Buildings You Work In
Addison solutions are commonly used in K-12 schools, healthcare environments, commercial office buildings, hospitality properties, and industrial facilities where ventilation, humidity control, and indoor air quality are critical for comfort and building performance. Whether supporting a new facility or upgrading an existing one, Addison’s flexible HVAC solutions help create healthier, more comfortable indoor environments.
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