Who Does the Load Calculation?
The contractor you choose to install your new system should be able to perform these calculations. You may ask him for this service. If he doesn’t want to do it, or says it isn’t necessary, you may want to look for a different contractor. In some areas, the local utility will perform a load calculation – check with your local utility.How Big Is Big? • The size of a heating or cooling unit is really the rate at which it supplies heating or cooling, not how big the equipment is. • Heating size is given in Btus per hour (Btu/h). • Cooling size is given in tons of cooling; 1 ton = 12,000 Btu/h. • “SEER” (Seasonal Energy Efficiency Ratio) indicates the efficiency of the air conditioning unit, not its capacity.Why it’s Important to Have the Right Sized System Having the wrong-size heating-cooling system can lead to multiple problems. Over-sizing your cooling system is not a good thing. Without getting into too much detail, your cooling load consists of two parts: • The temperature of the air
