Temp adjustment range
It is the range in which the air temperature can be set on the regulator. The choice for this indicator depends on the expected conditions in the room. So, in a residential building, the lower temperature limit at the level of 5–10 °C is quite sufficient; the upper limit is within 30–40 °C (regardless of whether we are talking about air or floor temperature). But in control devices designed for industrial use, this range will be much wider — from sub-zero temperatures to the upper limit of 100 – 125 °C.
Hysteresis
Automatic temperature control hysteresis provided by the device.
Hysteresis can be described as the difference between the on and off temperatures of a system controlled by a thermostat. Usually, the permissible deviations of the actual temperature from the nominal one in one direction or another are half the hysteresis. So, at a set temperature of 22 °C and a
hysteresis of 0.5 °C, the controller will turn on the heating as soon as the room temperature drops to 21.75 °C, and turn it off when it rises to 22.25 °C. Accordingly, the lower this indicator, the more carefully the temperature is maintained and the fewer fluctuations. On the other hand, small hysteresis values require accurate and expensive thermal sensors, increase fuel/energy consumption and wear of the entire system, and create an increased risk of false alarms (for example, from a cool draft on the thermal sensor). In addition, relatively small temperature fluctuations are practically imperceptible in terms of human comfort. Therefore, many modern thermostats have a
hysteresis of 1 °C — this, usually, is quite enough for domestic use.
Also note that this parameter can be both
fixed and
adjustable. The first option is simpler and cheaper, and the second provides additional options for setting the thermostat to the specifics of the situation.
Communication range (indoor)
The maximum communication range between the receiver and the transmitter of the wireless thermostat (see "Connection"), ensured when operating indoors.
There are walls between the thermostat and the remote unit that impede the passage of the signal. Therefore, the communication range indoors will inevitably be less than outdoors (see below). It is also worth noting that this parameter is indicated based on a certain average number and thickness of walls. In fact, in some cases (in particular, if the walls are thick), the communication range can be noticeably less. Therefore, it is worth choosing according to this parameter with a significant margin. Nevertheless, it is quite possible to compare different models with each other in terms of the communication range indoors.
