The Cypress Home With 18 HVAC Dampers and Zero Thermostats

In a Cypress home Grizzly Tec designed and installed, there isn’t a single thermostat on the wall.

There are 18 HVAC dampers in the ceiling. There are Loxone wall switches throughout the house. And there’s one piece of automation logic running on a Loxone Miniserver in the closet.

What’s missing is the wall thermostat — the single round dial that decides the temperature of an entire zone of a house. The Cypress homeowner doesn’t have one, doesn’t need one, and never wants one again.

Houston makes this problem worse than most cities. Big homes (4,000–8,000 sq ft is normal in Cypress), big sun exposure, big humidity load, and a 102°F afternoon make the gap between rooms enormous. The west-facing rooms cook at 4 PM. The shaded rooms stay cool. One thermostat can’t represent both. Every Loxone Touch wall switch is also a temperature sensor — the same switch that turns on the lights also reads the room temp. The Miniserver reads from all of them continuously, compares each reading to that room’s setpoint, and tells the corresponding damper to open or close.

Read the full project breakdown → Case Study: The Cypress Home With 18 HVAC Dampers and Zero Thermostats