Correct Air Engineering is a Third party licensed Heating, Ventilation and Air Conditioning (HVAC) contracting firm; which specializes in load calculations for residential and light commercial HVAC system design. As a Third party, we do not sell, install or repair equipment; we simply provide quality assurance for HVAC contractors by designing systems from an independent, unbiased perspective. Our senior designer Glenn Goetzinger is a HVAC Licensed Master and has prepared thousands of load calculations over his 45 years in the trade. Many States and local codes now require Manual J, N, D and S calculations for every new project and upgrades of existing projects. This load calculation process was developed by engineers in the heating and air conditioning industry and has been used for decades to accurately size heating and air-conditioning equipment. After completing this load calculation process, one can determine the properly sized piece of HVAC equipment to satisfy the load requirements. Why Hire Us To Do Your Manual J, N & D Reports? We provide super fast turn around times and extremely accurate certified calculation reports to architects, energy consultants, HVAC contractors, and builders nationwide. Our reports are ACCA Manual J 8th Edition Certified, and our reports utilize the ASHRAE CLTD or ASHRAE RTS method. Offering over 45 years of HVAC experience "not combined".