For over 30 years Arzel Zoning has been manufacturing industry-leading zoning systems that offer the quietest, most efficient, and most reliable solutions to the comfort issues people face in their home or office everyday. Arzel’s Stapler Staples Tool Kit 90° Right & Left Snips Item Description HeatPumPro 2 Zone HeatPumPro 3 Zone HeatPumPro 4 Zone GTPro 2 Zone GTPro 3 Zone GTPro 4 Zone Zone Valve Control Item Description 24 vdc solenoid (HeatPumPro) Pressure Switch 24VAC 100VA Transformer (6-8 zone) Modulating Bypass Transmitter Arzel ® Technology, Inc. systems are also the easiest to install, which means it saves contractors time and labor cost. Arzel offers the sales, marketing, and technical support needed to make selling and installing its systems the only option.