Home / Products / Grindiniai konvektoriai su ventiliatoriais FH4-H

Trench heaters with fans FH4-H

High heat output, allowing use as primary heating units even in low energy-efficiency buildings
Extremely low noise level
Efficient operation with low-temperature heat sources, such as heat pumps and condensing boilers
Low thermal inertia allows heat to be supplied strictly according to actual demand, significantly reducing energy consumption and preventing overheating.
EC fans – maximum energy efficiency with up to 4× higher convection performance
Robust stainless steel casings, capable of withstanding the weight of several adults
Reversible aesthetic grilles made of aluminium or solid oak
Designed and manufactured in EU

10-year warranty on casings and heat exchangers
Made of stainless steel
Tested in an independent laboratory according to EN16430
Ultra-low noise level
Economical EC type fans
Maximum pressure 25 BAR
Safe operating voltage for fans
Works excellently with condensing boilers and heat pumps
Acoustically insulated
Description
Technical specifications
Dimensions
Configuration
Download
Grilles
Accessories
Order Codes

FH4-H trench heaters combine high heat output with compact dimensions and are designed for reliable operation in spaces with particularly strict acoustic requirements. Thanks to their extremely low noise level, these convectors are successfully used in thousands of bedrooms, hotel rooms, and residential spaces, providing thermal comfort without audible background noise.
The units ensure efficient performance in low-temperature heating systems and are fully compatible with heat pumps and condensing boilers.
Low thermal inertia allows rapid response to temperature changes, making FH4-H one of the most energy-efficient solutions, capable of maintaining the set room temperature with high accuracy (up to ±0.5 °C).
Integrated EC fans provide up to four times higher convection efficiency, while maintaining a very low acoustic level across the entire operating range and ensuring even heat distribution throughout the room.
The convectors are equipped with robust stainless steel casings, ensuring durability and reliable operation even in areas with intensive use. The construction is designed for pedestrian loads – the convector can be safely walked on and is capable of withstanding the weight of several adults simultaneously.
For architectural integration, reversible aesthetic grilles made of aluminium or solid oak are used, allowing the solution to be matched to the floor finish and overall interior concept. 

  1. Stainless steel casing
  2. Heat exchanger holder
  3. Cover for hydraulic connections
  4. Casing reinforcement elements
  5. Anodized aluminum frame; color matches the grille color
  6. Copper-aluminum heat exchanger
  7. Air vent
  8. Air deflection element
  9. Fan with EC motor
  10. Air filter
  11. Control unit (ordered separately)
  12. Protective-decorative grilles (ordered separately)
  1. Heat exchanger protection-fixing elements
  2. Adjustable height legs
  3. Sound-insulating leg pads
  4. Casing floor mounting elements
  5. Sound-insulating gaskets
  6. Pipe sealing-protection elements
  7. Cable sealing-protection elements
  8. Blanks for unused openings
  9. Fan vibration isolation pads

Mounting hardware
Installation instructions

5-layer, 2-part corrugated cardboard box, also used as protective covering for the device during construction work

FH4-H

ROLL-UP ALUMINUM GRILLES GR

SILVER (ALS)

BROWN (AL10)

BLACK (AL50)

LINEAR ALUMINUM GRILLES GR-L

SILVER (ALS)

BROWN (AL10)

BLACK (AL50)

ROLL-UP WOODEN GRILLES GR

OAK (OAK)

Actuator for Thermostatic Valve A24NC

For opening/closing the thermostatic valve. Controlled by room thermostat TW24

Operating voltage - 24V DC

E power - 2.5W

Protection class - IP54

Connection thread - M30 x 1.5mm

Casing material PC/ABS

Thermostatic Valve (Straight) TVS15

For regulating the energy carrier flow. Controlled by actuator A24NC

Operating temperature -10℃ - 120℃

Thread 1/2″

Pressure class - PN10

Kvs - 2.00

Body - nickel-plated bronze

Return Flow Limiter (Straight) LS15

For opening, closing, and setting the maximum flow of the energy carrier

Operating temperature -10℃ - 120℃

Thread 1/2″

Pressure class - PN10

Kvs - 2.00

Body - nickel-plated bronze

Return Flow Limiter (Angled) LA15

For opening, closing, and setting the maximum flow of the energy carrier

Operating temperature -10℃ - 120℃

Thread 1/2″

Pressure class - PN10

Kvs - 2.00

Body - nickel-plated bronze

Control unit CB20

For connecting and powering fans, A24NC actuators, and TW24 room thermostat

24V DC power supply

Power - 20W

Current - 0.84A

E connection terminals

Stainless steel casing

CONVECTOR ORDER CODE

MODEL LENGTH, cm WIDTH, cm HEIGHT, cmEXAMPLE
FH4-H209228.6FH4-H 209-22-86

GRILLE ORDER CODE

MODEL LENGTH, cm WIDTH, cmMATERIAL EXAMPLE
GR20020ALSGR 200-20-ALS
GR-L20020ALSGR-L 200-20-ALS
GR – roll-up grilles ALS – aluminum grilles, silver color
GR-L – linear grilles AL10 – aluminum grilles, brown color
AL50 – aluminum grilles, black color
OAK – oak grilles

ACCESSORY ORDER CODES

ORDER
MODELCODE
Straight return flow limiterLS15
Angled return flow limiterLA15
Straight thermostatic valveTVS15
Axial thermostatic valveTVA15
Elektroterminė pavara 24VA24NC
Control unitCB20
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