For all doors of climate chambers, rheumatism cells, deep freeze cells, deep freeze rooms and cold stores!

Features and benefits

  • For climate chambers and rheumatic cells
  • Use for deep freeze cells
  • Use for deep freeze chambers
  • Use in cold stores
  • From -50°C to +135°C (silicone-based design)
  • Made in Germany

Do you have any questions or like to place an order?

General questions
07135/98 98 0 or

Question about our products


Climate chamber for environmental testing


When is door frame heating necessary?

In environments where low temperatures prevail and unhindered access must be ensured, a door frame heater is an indispensable element. In climate chambers, rheumatism cells, deep-freeze cells, freezer rooms or cold stores, these heaters play a decisive role in ensuring that the door seal does not freeze and that trouble-free operation is possible. 


The frame heaters offered by HEMSTEDT use high-quality silicone or PTFE-insulated heating cables that reliably fulfil their function over a wide temperature range. Our PTFE heating cables, for example, are designed to function reliably even under extreme conditions, whether at icy -100°C or at hot +220°C (with PTFE insulation). It should be noted that a temperature cut-out is required in the positive range to ensure overheating protection.


With our door frame heaters, you get first-class products with the safety and confidence that are essential in demanding environments. Our solutions keep your equipment running smoothly and minimise the risk of breakdowns due to iced door seals.


Available versions with silicone insulation:

Heating cable HEM-SiSi, type NH2GM2G, protection class II


  • with temperature monitor order no. 44500
  • without temperature monitor Order no. 42500


Further variants on request.


Our products also run on fuel cell / hydrogen technology!
Made in Germany - since 1974
  • Underfloor heating is harmful to your health? Wrong!

    This prejudice is from the 1960ies and no longer correct.

    Quite the contrary!

    Here You get to know why!

  • Electric underfloor heating is expensive? Wrong!

    A comparison in terms of acquisition and consumption gives clarity.

  • Electric underfloor heating

    Pros and cons underfloor heating – Does it make sense?

  • Creative freedom and feel good architecture thanks to underfloor heating

    „Heat coming up from beneath as naturally as heat rises - there is no other ideal heat“ (Frank Lloyd Wright)

Specifications frame heater for deep-freeze rooms, Item no. 44500 / 42500

Heating cables HEM-SiSi, type NH2GM2G
Protection class II
Connection double sided, with 2 PVC-cold lead 2 x 0.75 mm²
Connection length 0.50m
Voltage 230 V, 50 Hz
Output in W/m 10, 15, 20, 25, 30 and 35 (The allowed load depends on the heat deduction condition)
With thermostat Item no. 44500: 16 mm
Without thermostat Item no. 42500: 0.50 - 20 m
Diameter 3.9 mm
Nominal limit temperature +135 °C
Note Different voltages, output and length are available on request. Extension of cold tail is possible for add. charge.

To top