Trench heaters with fans FH4-H

High thermal power, allowing use as primary heating devices even in low energy efficiency buildings
Extremely low noise level, suitable for rooms with strict acoustic requirements
Efficient operation with low-temperature heat sources, such as heat pumps and condensing boilers
Low thermal inertia allows heat delivery based on actual demand, thus significantly reducing energy consumption and avoiding overheating of rooms.
EC fans – quiet operation and maximum efficiency, ensuring up to 4× greater convection efficiency
Robust stainless steel casings, designed for pedestrian loads and capable of supporting the weight of several adults
Double-sided aesthetic grilles made of aluminum or oak wood
Designed and manufactured in Lithuania

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  • Description
  • Technical specifications
  • Dimensions
  • Configuration
  • Download
  • Grilles
  • Accessories
  • Order codes

FH4-H floor convectors feature high thermal power in compact dimensions and are designed for reliable operation in spaces with very strict acoustic requirements. Due to the extremely low noise level, these convectors are successfully used in thousands of bedrooms, hotel rooms, and living spaces, ensuring comfort without audible background noise.
The units ensure efficient operation in low-temperature heating systems and are adapted for use with heat pumps and condensing boilers.
Low thermal inertia allows quick response to temperature changes, making FH4-H one of the most economical solutions, allowing precise maintenance of the set room temperature (up to ±0.5 °C).
Integrated EC fans ensure up to 4 times greater convection efficiency while maintaining a very low acoustic level across the entire operating range and even heat distribution in the room.
Convectors are equipped with durable stainless steel casings, ensuring longevity and reliable operation even in high-traffic areas. The design is adapted for pedestrian loads – the convector can be safely walked on and withstands the weight of several adults.
For architectural integration, double-sided aesthetic grilles made of aluminum or oak wood are used, allowing the solution to be matched to the floor covering and 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

ROLL-UP ALUMINUM GRILLES GR

SILVER (ALS)
SILVER (ALS)
BROWN (AL10)
BROWN (AL10)
BLACK (AL50)
BLACK (AL50)

LINEAR ALUMINUM GRILLES GR-L

SILVER (ALS)
SILVER (ALS)
BROWN (AL10)
BROWN (AL10)
BLACK (AL50)
BLACK (AL50)

ROLL-UP WOODEN GRILLES GR

OAK (OAK)
OAK (OAK)

Actuator for Thermostatic Valve A24NC

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

Actuator for Thermostatic Valve A24NC
  • Operating voltage - 24V DC
  • E power - 2.5W
  • Protection class - IP54
  • Connection thread - M30 x 1.5mm
  • Casing material PC/ABS

Thermostatic valve with presetting (straight) TVSP15

For regulating the energy carrier flow. Controlled by actuator A24NC

Thermostatic valve with presetting (straight) TVSP15
  • 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

Return Flow Limiter (Straight) LS15
  • 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

Return Flow Limiter (Angled) LA15
  • Operating temperature -10℃ - 120℃
  • Thread 1/2″
  • Pressure class - PN10
  • Kvs - 2,00
  • ody - nickel-plated bronze

Control unit CB20

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

Control unit CB20
  • 24V DC power supply
  • Power - 20W
  • Current - 0.84A
  • E connection terminals
  • Stainless steel casing

Room Thermostat TW24

For maintaining the set room temperature. Controls actuator A24NC

Room Thermostat TW24
  • Dimensions 88 x 88 mm
  • Weekly temperature schedule programming
  • Operating temperature 5 - 35°C
  • Operating voltage - 24V DC, current - 3A
  • E power - 1.5W

CONVECTOR ORDER CODE

MODELLENGTH, cmWIDTH, cmHEIGHT, cmEXAMPLE
FH4-H209228.6FH4-H 209-22-86

GRILLE ORDER CODE

MODELLENGTH, cmWIDTH, cmMATERIALEXAMPLE
GR20922ALSGR 209-22-ALS
GR-L20922ALSGR-L 209-22-ALS
GR – roll-up grillesALS – aluminum grilles, silver color
GR-L – linear grillesAL10 – aluminum grilles, brown color
AL50 – aluminum grilles, black color
OAK – oak grilles

ACCESSORY ORDER CODES

ORDER

MODELCODE
Return Flow Limiter (straight)LS15
Return Flow Limiter (angled)LA15
Thermostatic radiator valve with pre-setting (Straight)TVSP15
Room ThermostatTW24
Electrothermal Actuator 24VA24NC
Control unitCB20