rows of rooftop hvacs on the roofdeck of an office tower. vrf air conditioner for commercial buildings

air airconditioningunit appliance background bpo building chilled climate commercial compressor conditioning consumption cool cooling deck electric electrical emissions energy energyefficient environment equipment exhaust factory flow heat hvac industrial industry machine manila many office outdoor outside philippines radiator refrigerant refrigeration roof rooftop rows system technology tower tropical unit utility variable vent vrf vrv waste water