PETRA

air conditioning equipment, namely, air-cooled water chillers, water-cooled water chillers, chillers for other liquid cooling, package units, water source units, ducted split units, mini-split units, close control split units, air handling units, fan coil units; heat pumps; refrigeration equipment, namely, air cooled refrigeration units, unit coolers, unit freezers; unit heaters; dry coolers; air humidifiers and dehumidifiers; evaporators for air, gas and liquid cooling for refrigeration services; shell vessels, namely separators, accumulators and receivers used in refrigeration services