HVAC Turnkey Solutions Home > HVAC Turnkey Solutions HVAC Turnkey Solutions Engineering design and equipment integration for air-conditioning, mechanical ventilation and refrigeration plants. Fabrication of "Explosion proof and Non-Explosion proof" HVAC units suitable for hazardous areas. Installations, testing and commissioning in-situ Preventive Maintenance Services ( PMS ) and Plant Trouble-Shooting and Inspection ( PTI ) System.