Setpoint 511s, Single Temperature Programmable with Sensor

Replaced meanwhile 2 of 5 remaining 501 slab only sensing thermostats to control the in-floor hydronic heating. The room sensor control enabled by the 511 model considerably improved the comfort level in the areas with the upgraded thermostats given the typical large daily temperature swings we experience in AZ. The programmability of the 511 is a desirable improvement to control areas with different usage schedule.

Great product with 2 caviats. I used it to teplace a 501s (non programmable) Poles/ternials 1-2 and 3-4 are switched from the 501s. They are clearly marked but i diidnt realize until i hooked it up and it didnt work. Easy enough to fix though. The other thing is that it was difficult to program. The programming instructions are poor and i had to call wirsbo for some help. And the installer,/user switch wS not clearly marked. All that said i love it and my radiant heat is working great.

Even though it costs considerably more, the Uponor programmable thermostat is well worth it. It is ideal for radiant floors that have a natural lag effect causing them to gain and lose heat slowly. I have a large contraflow masonary fireplace so I use both the air and floor sensors. The thermostat has other sensor options that can be used instead of the floor, such as a remote room option or an outdoor sensor. Air and floor temperatutes, as well as the target air temperature are all easy to scroll through and monitor. The thermostat uses microprocessor technology that calculates temperature differentials between current and target temperatures and ramps up according to need. An early start feature further improves performance. The thermostat is accurate. It doesn't overshoot. Instead, it starts cycling down as it approaches the set target. Other advantages are that it has an away feature that can be used without changing your programmed settings. It also has a night light option and it doesn't require a battery to maintain memory after loss of power.

Works really well. I wish they made one with WiFi so i could adjust my heat when at the office.