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 Air Cooled Low Sound Chiller with VSD Screw Compressor Explosion Hazardous Location Air Cooled Chiller Residential Air Cooled Water Chiller Modular Water Cooled Water Chillers Air Cooled Low Sound Chiller with VSD Screw Compressor Explosion Hazardous Location Air Cooled ChilExplosion Hazardous Location Air Cooled Chillerler Air Cooled Chiller with Screw Compressor Air Cooled Chiller with Screw Compressor 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 Variety of refrigerants offered Built in pumping package Air Cooled Chiller with Scroll Compressors Air Cooled Chiller with Scroll Compressors 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 PETRA OFFERS A WIDE RANGE OF HVAC PRODUCTS TO MEET DIFFERENT SPECIFICATIONS AND REQUIREMENTS " These marks/certifications apply to specific ranges of Petra products "http://www.petra-eng.com