Your data. Your choice.

If you select «Essential cookies only», we’ll use cookies and similar technologies to collect information about your device and how you use our website. We need this information to allow you to log in securely and use basic functions such as the shopping cart.

By accepting all cookies, you’re allowing us to use this data to show you personalised offers, improve our website, and display targeted adverts on our website and on other websites or apps. Some data may also be shared with third parties and advertising partners as part of this process.

Legal noticePrivacy notice

Siemens Radiator thermostat

Price in EUR including VAT
Ratings
BrandMore from Siemens
Delivered between 8.1.2026 and 16.1.2026
Free shipping starting at 30,–

Product details

Siemens digital industrial radiator thermostat BPZ:RTN51G

Manufacturer: Siemens digital industrial
Designation: Radiator thermostat glossy
Type: BPZ:RTN51G
Setting range: 12...28 °C
Blocking/limitation setting range: Yes
Frost-proof: Yes
Clock programme: No
Colour: Other
RAL number: 9016

Further details:
Thermostatic actuators for automatic control of the room temperature. Setpoint adjustment by turnable handle. Version with closing and frost protection position. Limiting rider for minimum or maximum limitation or setpoint locking. Fits Siemens radiator valves VDN../VEN../VUN../VPD../VPE..

Key specifications

Power supply
Without external power source
Thermostat type
Radiator thermostats
Suitable for
Radiator
Smart Home
Not compatible
Item number
36816843

General information

Manufacturer
Siemens
Category
Thermostats
Manufacturer no.
BPZ:RTN51G
Release date
28.6.2023

Colour

Colour
White
Exact colour description
RAL 9016

Thermostat properties

Thermostat type
Radiator thermostats
Suitable for
Radiator
temperature control
Manual
connector type
With thread
Thermostat functions
Frost protection setting
Display
Analogue

Smart home features

Smart Home
Not compatible

Origin

Country of origin
Denmark

Sustainability

Manufacturer commitment
RE100, SBTi

Voluntary climate contribution

Manufacturer compensation
According to RE100, the manufacturer Siemens fully compensates for its energy consumption, leading to a reduction in emissions.
CO₂-Emission
Climate contribution

Power supply

Power supply
Without external power source

Scope of delivery

Scope of delivery
Radiator thermostat glossy

Product dimensions

Length
10.10 cm
Width
6.50 cm
Height
5.70 cm

Legal Notice

Product Safety

14-day cancellation right
30-day right of return
24 Months statutory warranty
Report concern

Compare products

Goes with

Reviews & Ratings

Statutory warranty score

How often does a product of this brand in the «Thermostats» category have a defect within the first 24 months?

Source: Galaxus
  • Siemens
    Not enough data
  • 1.Oventrop
    0 %
  • 1.TP-Link
    0 %
  • 3.Eberle Controls
    0,2 %
  • 4.Honeywell
    0,3 %

Statutory warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Galaxus
  • Siemens
    Not enough data
  • 1.Aqara
    0 days
  • 1.EQ-3
    0 days
  • 1.Homematic IP
    0 days
  • 1.Meross
    0 days

Return rate

How often is a product of this brand in the «Thermostats» category returned?

Source: Galaxus
  • Siemens
    Not enough data
  • 1.EQ-3
    0,1 %
  • 2.Bosch Smart Home
    1,5 %
  • 3.Homematic IP
    2,3 %
  • 4.Sonoff
    2,6 %
Source: Galaxus