Stillwell-Hansen Inc

Stillwell-Hansen Inc has operated from Edison, New Jersey since 1988, delivering critical infrastructure solutions to commercial and industrial clients across the region. The company holds an A-1 HVAC license and maintains a 4.6-star rating from 7 client reviews, with service territories spanning Middlesex and Somerset counties. While primarily serving data centers, pharmaceutical manufacturers, and commercial facilities, the company also supports residential clients with specialized needs such as indoor pools, home grow operations, and dedicated server rooms. Their team of 12 certified technicians operates Monday through Friday from 8 AM to 5 PM, providing both scheduled maintenance and emergency response for critical climate systems.

What distinguishes Stillwell-Hansen from typical HVAC contractors is their focus on mission-critical environments and partnerships with tier-one manufacturers including Vertiv for uninterruptible power systems, Condair for precision humidification, and Fike for fire suppression technology. The company offers lithium-ion UPS upgrades that last up to three times longer than traditional batteries, along with ultrasonic mist humidifiers that reduce energy costs by 90 percent. Their thermal management division handles both cooling and dehumidification for controlled environments, while their in-house service department provides 24/7 troubleshooting for data center infrastructure failures. This specialization in commercial-grade climate control sets them apart from general residential HVAC providers.

Client feedback highlights the technical expertise of Stillwell-Hansen's service team. Juan Peralta, reviewing in September 2024, praised the company's training and detailed approach following a system calibration project. For residential clients with complex climate requirements, such as indoor pool dehumidification or precision-cooled home offices, Stillwell-Hansen brings commercial-grade knowledge that general residential technicians often lack. The company's experience with pharmaceutical-grade climate standards translates to homeowners demanding hospital-air quality in their living spaces. Their emergency response capability ensures critical systems stay operational during New Jersey's extreme weather months.