What System is Right For You?

To determine the proper size of equipment and ductwork your home needs, McCullough's experienced technicians will measure your home and calculate the actual heating & cooling load on the home. Our calculations incorporate window size and direction, walls, ceiling, floor, appliances, insulation, and much more. We'll compare this to your current equipment, and adjust for your lifestyle.

Is Bigger Better?

Not necessarily. An oversized air conditioner will cool your house quicker, but it will use more electricity and will not remove humidity adequately. Contrary to popular belief, long AC system run cycles are far more desirable and energy efficient than short run cycles. The greatest amount of energy usage, and wear and tear on your equipment, occurs at system start up. Once started, it takes up to 10 minutes before your system is operating at peak efficiency and performance. An oversized system will often bring the temperature down to the thermostat setting in just a few minutes; thus your oversized system never gets to operate at peak performance. And, because removing moisture requires long run times (so enough air can flow over the cold coil), an oversized system shuts off before proper dehumidification can occur. Its short cycles cost you plenty in terms of comfort, utility bills and added repairs.

The same holds true with heating systems. An oversized furnace will warm the house quicker, but it uses more fuel and causes greater temperature swings in the home. McCullough's technicians can calculate the proper furnace size to maintain your comfort inside when it is very cold outside.

Check our FAQs for more great information on selecting the right system.