DEINDE addresses the needs of Builders, Architects, Engineers and HVAC companies by delivering high quality results and flexible turnaround to Homeowners, Residential/Commercial Builders and HVAC contractors. An ACCA certified professionals provide HVAC design calculations, Manual J heat loss/gain calculation, Manual D duct designs and Manual S equipment selection services nationwide. Whether it’s a small home by the shore, an addition, a new 4,000 sq ft home with two systems or even a 10,000 sq ft mansion – DEINDE is pleased to be of service to you. GET THE REPORTS IN THREE DAYS!!

HVAC contractors use a Manual J calculation to determine the heating and cooling loads of a home or building, and recommend the capacity of HVAC equipment needed.

HVAC Load Calculations

Fig: System Design Process

By using Manual J methodology, HVAC designers are able to accurately determine the total amount of heat that is lost through the exterior of a home during the cooler months, and the total amount of heat that is gained through the exterior of a home during the warmer months. Through a complex series of calculations and inputs, the HVAC designer is able to analyze all aspects of the thermal characteristics of every wall, floor, ceiling, door and window. In addition, an HVAC load calculation also takes into consideration other factors such as the home’s geographic location, orientation to the sun, envelope tightness, duct leakage, lights and appliances. ACCA’s Manual J even calculates the amount of heat and humidity that each occupant of the house will add to the interior of the home.