I used to suppose that the bigger the air conditioning and heating plan the better. I figured that more power would translate into superior comfort and lower bi-weekly costs. Assuming a large heating and cooling plan would heat up or cool down the home more abruptly, I started doing some research into unusual models. I discovered that an oversized furnace and cooling system would result in higher energy costs, less indoor comfort, and concerns with operation. It’s not as simple as buying the largest or most extravagant heating and cooling system. Even calculating the square footage of the house isn’t enough to officially size temperature control equipment. The Heating and Air Conditioning contractor who is hired to install the new plan needs to consider complications such as load estimate, maximum occupancy, SEER ratings, and AFUE ratings. The heating and cooling plan must be designed to suit the home’s unique thermal envelope. The thermal envelope encompasses the barriers to the outside, such as the walls, insulation, roof, windows, doors and foundation. A officially sized and installed Heating and Air Conditioning plan can be expected to last approximately fifteen years. It will maintain even comfort, despite the weather outside, and operate efficiently and reliably. An oversized plan will heat or cool the home too abruptly. The compressor and fan then turns off until the next cycle, which happens within hours. The constant on and off of the unit is called short cycling, and it wear out components and limits air circulation throughout the home. This drawback impacts indoor air conditions and the health of the home. Since the plan is continuously shutting off and turning on, it’s also drawing more energy and causing higher utility bills.