Heat Exchange

For Telecom cabinets and shelters.

The Dantherm DC Thermosiphon provides cooling without air conditioning and is specifically designed with Telecom installations in mind. It is easily installed without affecting uptime, which secures site earnings even during installation and service.

Passive cooling systems are among the most energy-efficient in the market, next to Free Cooling. The closed loop control system ensures a clean internal environment for sensitive electronic equipment, which means that no filter is needed.

Thermodynamic heat exchange is a more compact way of generating heat exchange than traditional air-to-air heat exchangers.
Dantherm is among the first suppliers to enter the market with a fully industrialized version of this concept and already has experience from 50.000+ Thermosiphons running in the field.

  • Dantherm DC Thermosiphon DC Thermosiphon 150
Dantherm Suzhou

Dantherm Air Handling (Suzhou) Co., Ltd
Bldg#9 No.855 Zhu Jiang Rd
Suzhou New District
Jiang Su, China, 215129
Tel: +86 512 6667 8500

Animation Thermosiphon coooling for Telecom enclosures and shelters Play
DC Thermosiphon

Extremely energy-efficient
Fully industrialized
Closed loop cooling

  • Dantherm Thermosiphon Dantherm provides intergrate and split Thermosiphon, both DC and AC solutions are available.
Supply Voltage Nominal VDC/VAC 48 VDC 48 VDC 230 VAC 230 VAC 220±20%VAC
Capacity in W/K 150 300 300 400 440
Capacity in kW - at Δt = 10°C 1.5 3.0 2.7 4.0 4.4
Max internal air flow m³/h (free blowing meassurement) 1000 1900 1800  2700 3100
Weight in kg 35 74 73

43 (ext)41 (int)

38(ext)35 (int)


  • Radio base stations
  • Telecom Cabinets
  • Telecom shelters
  • Electronics enclosures
  • Hybrid Telecom Sites
  • Power supply rooms
  • Network & computer rooms
  • Drive stations
  • Automation control cabinets
Features and Benefits

Construction and design:

  • Closed loop cooling
  • corrosion-proof components

Operation modes:

  • Main cooling mode with dynamic, step-less fan speed control.
  • Power save, boost, emergency cooling, self-test.

Communication, alarms and surveillance:

  • IP-connection, LED-signals, TTL-link, SD card.
  • 2 galvanically insulated alarm outputs: High and low temperature, fans, temperature sensor function
  • default list entry three

 Built-in safety:

  • Leakage, voltage and function test from factory.
  • Reverse polarity protection
  • Inrush current limiter

Easy installation:

  • Installation cable provided.
  • No need for cooling technician.
  • No soldering or refrigerant filling on site.


Features - Dantherm Thermosiphon Line 150 300 300 400 440 
 Supply voltage VAC     bullet bullet bullet
 Supply voltage VDC bullet bullet      
Closed loop cooling Separates air streams Separates internal air stream from external air stream. Keeps outside contaminants from entering the enclosure. No filter is needed. Contributes to a long service life of the electronic equipment and minimizes OPEX. bullet bullet bullet bullet bullet 
Thermosiphon cooling method Passive heat exchange Passive heat exchange based on natural convection. Highly energy-efficient and environmentally friendly cooling method, resulting in low OPEX and a carbon footprint reduction. bullet bullet bullet bullet bullet
Cooling circuit without compressor Passiv cooling Passive cooling by means of natural principle of heat transfer. Energy-efficient, lower OPEX, easy to transport lying down - which reduces transport costs. bullet bullet bullet bullet bullet
No filter needed Closed loop cooling Cost-saving; no filter maintenance or replacement. Results in low service and maintenance costs. bullet bullet bullet bullet bullet
Two centrifugal DC EBM fans High capacity and quality fans High-capacity and -quality fans. Energy-efficient and cost-saving. High quality resulting in low TCO and prolonged service life. bullet bullet      
High quality fans bullet bullet bullet bullet  bullet

Construction and design

150 300 300  400  440
Thin, aluzinc sheet metal, powder coated with RAL 7035 Corrosion-proof Strong, corrosion-proof construction (EN 10143 & EN 10327). Prolonged service life. bullet  bullet  bullet bullet bullet 
Corrosion protected components Service life extending Anti-salt spray treated coil, water-resistant fan, external fan with humidity protection all highly environment protected. Suitable for coastal areas. Long service life. bullet bullet bullet bullet  bullet
Ingress protection level 55 (IP55) IP 55 Protects electronic equipment in the enclosure from dust, water and wind-driven rain according to EN 60529. bullet bullet bullet bullet bullet 
Operation Modes  150 300   300 400 440 
Cooling Thermosiphon cooling Energy-efficient cooling with dynamic, step-less fan speed control. Reduces OPEX. bullet bullet bullet bullet  bullet
Power Save Stand-by in case of low power supply Prolongs battery performance. Extends transmission time in case of power outage. bullet bullet      
Boost In case of overheating In case of overheating, the fans will be running at 100 %. Ensures base station uptime even at extreme ambient temperatures. bullet bullet   bullet  bullet
Emergency cooling Built in safety In case of controller failure, cooling is maximized to ensure base station uptime.  bullet bullet    bullet  
Controllers and Sensors 150 300 300  400  440 
Dantherm CC1 control strategy Advanced, energy-saving control strategy. With stepless and adaptive fan regulation. Reduces carbon footprint and minimizes energy consumpton. Low OPEX. Designed for maximum uptime of the electronic equipment with built-in safety with reverse polarity protection, poke-in connections and inrush current limiter. Gives safe installation, service and maintenance and contributes to site uptime. bullet bullet      
Carel Controller     bullet bullet bullet 
Hotspot sensor (optional) Hotspot sensor Cooling is regulated according to extra temperature-sensitive or heat emmiting equipment. Prolongs service life of electronic equipment in the site. bullet bullet   bullet bullet 
Testing 150 300 300  400   440
Thorough factory testing From factory Leakage, function and voltage test. Quality assurance, smooth installation, long service life. bullet bullet bullet bullet  bullet
Self-test function Self-test function Used at start-up and service. bullet bullet bullet bullet  bullet
Installation and service 150 300 300   400 440 
Mono-block, plug and play installation. Mono-block Easily installed. No need for soldering or refrigerant filling on site. Low installation cost. bullet   bullet bullet    
Wall duct for inside installation Optional Flexible and easy installation. Cost and time saving installation. bullet bullet bullet    
Communication interface 150 300  300 400  440
Remote and on-site acces to settings and read-out of running conditions and alarms bullet  bullet       
SD Card Logging and reprogramming For configuration read-outs, running history log, parameter change. bullet bullet      bullet
TTL Link With TTL cable Serial connection for PC bullet bullet      
LED lights for status Alarms and operation status Gives quick overview of running status - time saving during maintenance visits. bullet bullet bullet bullet  bullet
Environment 150   300  300 400  440
Energy-efficient fans Low operational expences Minimal power consumption. Long service life, reduced energy costs. Low OPEX. bullet bullet bullet bullet bullet 
Refrigerant R134a Low carbon footprint Refrigerant R134a Environmentally friendly. Low carbon footprint. bullet bullet bullet    bullet
Refrigerant R22       bullet bullet 
Thermosiphon service manuals