Service & Innovation

There have been many changes since the first PMZ (which is still operating efficiently today) was put into service in 1988. The weight of the unit has decreased while the efficiencies have increased. The internal control is no longer electro-mechanical. Today all units are DDC controlled with an open protocol controller. Heating sources available now include natural gas, LP, electric, hot water and dual fuel with gas and heat pumps. Cooling sources include DX and chilled water. Geo-thermal capability is unmatched in our rooftop unit because of our modular design. These are additional tools on our design belt that enhance our PMZ. We give our customers the appropriate product for their application and needs.

The modular concept of the PMZ has fostered many unique designs, both in our rooftop PMZ and our indoor version. Up-flow, down-flow, horizontal, and side discharge, as well as adding ERVs or a separate unit in the return air compartment to pre-treat return or outside air in extreme conditions are just a few of the non-standard designs. The end result will be unique, and the concept constant–energy efficiency.

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