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Climate, Heating, Water Heating
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Heating & Boilers
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Thermostats
Thermostats Extherm
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Max. load (W)
Minimum hysteresis (°C)
Max. hysteresis (°C)
Pump hysteresis (°C)
Communication range (indoor) (m)
more parameters…
Communication range (outdoor) (m)
Sensor cable length (m)
Chain length (mm)
Chain load (g)
Immersion sleeve length (mm)
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with delivery in Ukraine
Extherm ET-21
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Extherm ET-21
Type:
heater / underfloor heating
Mount:
into mounting box, wired
Load:
up to 3600 W
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Price from
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Brand rating
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Main brands
Series
Suitable for
gas boiler
electric boiler
solid fuel boiler
heater / underfloor heating
pump
heat pump
outdoor system
fan coil unit
Type
mechanical
electronic
Connection
wired
wireless
DIN rail
Control bus
Bus BridgeNet
eBus
EMS
OpenTherm
Mounting
into mounting box
to boiler/heater
on wall
portable
DIN rail
in socket
Max. load
< 3 kW
3 – 3.4 kW
3.5 – 3.9 kW
≥ 4 kW
Timer
daily
weekly
Features
floor/heating medium temp sensor
air temp sensor
outdoor temp sensor
outdoor temp sensor connection
display
pump exercise function
holiday mode
random mode
control via Internet
frost protection
child lock
operating hours counter
T sensor calibration
adjustable hysteresis
fixed hysteresis
Minimum hysteresis
< 0.5 °C
0.5 °C
1 °C
Max. hysteresis
< 0.5 °C
0.5 °C
1 °C
> 1°C
Clear parameters
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Extherm
(
suitable for
)
Suitable for
Type
Mounting
one-piece
heater / underfloor
heating
ET-21
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