Manual J Residential Load Calculation, written by Air Conditioning Contractors of America (ACCA,) is the recommended method to accurately calculate the required size of a HVAC design system for a residential house. By utilizing the Manual J Load Calculation you will set yourself apart from your competition by guaranteeing your client will have the industry standard in home heating and cooling efficiency, thus keeping their energy costs to a minimum.
It is very important to size the heating and cooling unit appropriately. If the unit is too small, it will not condition the house fast enough, on the other hand, if it is too big, it will condition the house too fast without properly dehumidifying the room. Often contractors use