FAQs: NexTech HVAC & Refrigeration Services Allentown, PA Commercial HVAC Services b What types of commercial HVAC systems can you install? We install and service a full range of commercial heating and cooling systems, including rooftop units, split systems, VRF systems and heat pumps. Our team is experienced in all types of commercial HVAC work, … Continue reading Commercial HVAC & Refrigeration FAQs