Petra Chillers Offering As a leading manufacturer of HVAC equipment, Petra offers a wide spectrum of chillers that suits many applications and design requirements. Petra offers a range from 5-1500 tons of chiller capacity with the following designs: Air Cooled Water Chillers Water Cooled Water Chillers Modular Air Cooled Water Chillers Explosion Hazardous Location Air Cooled ChilExplosion Hazardous Location Air Cooled Chillerler Explosion Hazardous Location Air Cooled Chiller Residential Air Cooled Water Chiller Modular Water Cooled Water Chillers AAir Cooled Chiller with VSD Screw Compressorsir Cooled Chiller with VSD Screw Compressors Optional features and accessories (not limited to): Different compressor types: Screw or scroll Multiple control types of compressors: on-off, variable speed drive (VSD) or digital scroll Different refrigerant selection: R-410a or R-134a Built in pumping package Built in free cooling coil (Water Economizer) Low ambient operation Heat pump version Low sound version High efficiency version Ducted Indoor air-cooled chillers with centrifugal fans Custom solutions including new A2L Low GWP and mild flammability refrigerant designs, such as R32, R1234ze, R454B and R452B & A1 Low GWP R513A (refer to factory) PETRA OFFERS A WIDE RANGE OF HVAC PRODUCTS TO MEET DIFFERENT SPECIFICATIONS AND REQUIREMENTS Air Cooled Chiller with Scroll Compressors Air Cooled Chiller with Scroll Compressors Air Cooled Residential Chiller with VSD Scroll Compressors " These marks/certifications apply to specific ranges of Petra products "http://www.petra-eng.com