What is a Multi-Zone System?

Most residential and older HVAC Systems have one enormous flaw: They don’t provide a uniform or even well controlled environment. These simpler systems have one point of measuring temperature, and generally have to just hope that the single thermostat is a good representation of the temperature in the house. In practical terms, this means one room can be twenty degrees hotter than the rest of the building or a good draft from a single window can fool the thermostat into roasting everyone. This is the old way of doing things, from before we had cheap electronics and a mature industry to deliver on our comforts day and night. Take for example, my house. It was built probably in the late 1940s or early 1950s with hot water heat, two floors, and a single thermostat in the center of a house. This proves to be a challenge in the winter. The rooms first on the heating loops will become scorching hot. You open a window in those rooms and they become comfortable. The cold draft blows into the other rooms and they’re suddenly not comfortable. We might bake in the kitchen one night, whipping up a lovely ten to fifteen degrees of extra warmth, which happens to heat the thermostat. The kitchen eventually becomes comfortable, but the bed rooms freeze over.   Single Zone Systems This single-thermostat arrangement is called a Single-Zone system. There’s one data sample and one place all […]

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