TwinTech LLC

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About TwinTech LLC
TwinTech LLC operates as a heating contractor in McLean, Virginia with a 4.6-star rating drawn from 31 customer reviews. The company serves the broader Northern Virginia region, including McLean and surrounding communities, delivering both residential and light commercial HVAC solutions. Brothers Eric and John Glowacki established this family-owned enterprise in 2006, and both holding Virginia Master Mechanical Licenses along with nearly 60 years of combined industry experience. Their team provides installation, maintenance, and repair services across all major heating and cooling brands, supported by continuous service improvement training.
What distinguishes TwinTech is their investment in specialized systems and round-the-clock availability. They install UNICO high-velocity duct systems, a solution particularly suited to older homes where conventional ductwork would compromise interior aesthetics. Their portfolio includes ductless mini-split systems, hydronic boilers, and whole-house humidity control equipment, addressing the dry winter air common to the Mid-Atlantic. Notably, they maintain a fleet of four-wheel-drive service vehicles ensuring they reach customers during severe weather events. This capability complements their 24-hour emergency service, a practical resource when heating fails on frigid nights.
Customer narratives from verified reviews illustrate their operational approach. During the year's most intense heat wave, technician Eric diagnosed a system's failure after two other contractors proposed full replacements, he repaired it at a reasonable cost. Another reviewer recounting a gas furnace replacement noted TwinTech's methodical approach: attempts to source a part failed due to the unit's age, prompting a full replacement with transparent pricing and meticulous cleanup. These accounts align with recurring praise in reviews describing respectful on-site behavior and thorough post-job housekeeping.
What Customers Say
Five-star ratings comprise every reviewer voice, with Ericappearing by name in multiple positive accounts describing his diagnostic skill and fair pricing. Customers repeatedly reference thorough cleanup and courteous personnel.
Working Hours
| Sunday | Closed |
| Monday | 8 AM–4 PM |
| Tuesday | 8 AM–4 PM |
| Wednesday | 8 AM–4 PM |
| ThursdayToday | 8 AM–4 PM |
| Friday | 8 AM–4 PM |
| Saturday | Closed |
Services
Furnace Installation and Repair
Gas and electric furnace replacement, emergency repairs, and new system installations for residential applications.
Heat Pump Systems
Traditional and variable-speed heat pump installations serving both heating and cooling functions.
Boiler Service
Hydronic heating system maintenance, repair, and boiler unit replacements.
Ductless Mini-Split Systems
Zoned heating and cooling solutions for homes without existing duct infrastructure.
Air Quality Equipment
Electronic air cleaners, air scrubbers, and whole-house humidifiers improving indoor environment.
Duct Cleaning
Professional ductwork cleaning services to maintain system efficiency and air purity.
High-Velocity Duct Systems
UNICO systems preserving architectural integrity while delivering heated and cooled air.