And zoning any single system pays for itself even faster. HVAC veteran Trey Miller teaches HVAC
"I don’t care if you live in a 1,000 sq. ft. house, a 5,000 sq. ft. house, a townhouse, or an apartment – everybody has a zoning system in their home. Case in point, when you go to cut the light switch on at the front door, does every light in the house come on? Of course not; we zone our lights. Why do we zone our lights? The number one answer: To save money. Look at the energy consumption of a 100-watt light bulb burning continually 365 days a year. At year’s end, it would average $30; the cost is minimal. So are we really saving money by cutting off our lights? Or is it something that we’ve become accustomed to? Have you ever thought of a customer requesting only one light switch for their entire home?
Let’s also take a look at when we go to the kitchen and cut on that water faucet. Does every faucet in the house cut on? Of course not; we zone the water in our homes, too. Why? To save on our water bill. Two out of three mechanical systems in our homes are zoned. But the most expensive one to operate is the HVAC system. Yet as professional heating and air conditioning companies, we will go into a home and place one thermostat in the middle of the house, usually in a hallway with no supply registers and one return. It will not sense east sun or west sun, it will not sense north wind or south wind. But we expect that system to keep all the rooms on the perimeter of the house the same temperature. This is virtually impossible!"