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Relay Box

EBC20/22 control relay box.

When more than a couple of boilers are attached to a chimney, a relay box can be applied to as much as four boilers.

If you require more than a quartet of boilers, you can connect an extra pair of relay boxes. A total of eight boilers can be controlled for each EBC20/22.

  • Relay box ES12-EU-01
  • Description
  • Product Range
gass valve

Gas Solenoid Valves

The EFC21 controls are used in association with the gas solenoid valves of the exodraft, which allows the gas to be opened and closed based on the EFC21 control’s input.

Once the gas supply is opened by the valve and the proper flow in the chimney is determined, the combustion can start.

If the control senses a minimal flow amount, the valve will close. This will eliminate the risk of gas emission.

  • Gas solenoid valve SMG12
  • Description
  • Product Range
omron mx2

Frequency Converters

The frequency converters from exodraft are used in association with the controls of the EBC20 to regulate how fast the 3-phased chimney fans rotate:

  • FRK-008 is used with the RSV400-4-2 chimney fan
  • FRK-009 is used with the RSV450-4-2 chimney fan
  • Frequency converter FRK-008
  • Frequency converter FRK-009
  • Description
  • Product Range
exodraft cover plate

Additional Mounting Accessories

When pairing our chimney fan with original exodraft accessories, you take comfort in knowing that everything will operate as they should, and will for another 2 to 3 decades.

We provide the following chimney fan mounting accessories:

  • Protection from driving rain
  • Covers for steel chimneys and masonry chimneys
  • Vibration damper that tones down the vibration flow from the chimney fan to the chimney/building
  • Mandatory maintenance switch (for turning off the current for maintenance/cleaning purposes)
  • Screws for stable and safe chimney fan mounting
  • Cover plate
  • Cover plate FR1AFD
  • Cover plate FR2AFD
  • Cover plate FR3AFD
  • Cover plate FR4AFD
  • EFC-Box
  • Mounting accessories
  • Isolation switch (REP-AFB)
  • Isolation switch (REPAFB3P)
  • Isolation switch (REPSW2x16)
  • Isolation switch til gas
  • Anti vibration bolts SVD-RS
  • Description
  • Product Range
flanges round and square


An exodraft flange is placed underneath the chimney fan, producing a safe and stable transition between fan and chimney.

  • Vibration dampers
  • Manufactured from stainless steel
  • Option to order different sizes
Type Chimney Width (Internal Diameter) Dimension For Chimney Fan
FR1 - Square flange 125, 150, 175, 200 mm 272 x 272 mm RSV009, RSV160
FR2 - Square flange 125, 150, 160, 175, 200, 250 mm 310 x 310 mm RSV012, RSV200, RS009, RS255
FR3 - Square flange 150, 175, 200, 250, 300, 350 mm 395 x 395 mm RSV014, RSV250, RS012, RS014, RS285
FR4 - Square flange 200, 250, 300, 350, 400 mm 500 x 500 mm RSV016, RSV315, RS016, RSV400, RSV450
FR2-02 - Octagonal flange 150, 160, 200 mm 310 x 310 mm RS009-02
FR3-02 - Octagonal flange 150, 200 mm 395 x 395 mm RS012-02
  • Flange FR1
  • Flange FR2
  • Flange FR2-02
  • Flange FR3
  • Flange FR3-02
  • Flange FR4
  • Description
  • Technical Specifications
  • Product Range