Direct Air-heaters – DH & DHc

Most efficient and economic solution for fast and direct heating of large commercial and industrial spaces.
Operating strictly during the working hours, without wasting time and energy on preheating or conserving the system.

Indirect heating by flue gas – air heat exchanger, the air is distributed directly in the room via free blowing plenum or through air-ducts and air-diffusers.
Connectable to oil, natural gas and LPG burners.

Types

DH up tp 407kW

DHC compact with intergraded burner in 2 sizes 25, 35kW.

DHT specially designed for high temperatures, material drying processes.

DHB specially designed for pellet biomass fuel.


Download technical documentation (PDF)

 

Applications

  • Industries, Workshops & Warehouses
  • Shopping Malls & Exhibitions
  • Churches
  • Sports Centers
  • Greenhouses & Stockbreeding units
  • Material drying

Advantages

  • Low-cost installation, operation and maintenance.
  • Combustion efficiency ~ 90%
  • Double skinned galvanized steel casing panels with intermediate 30mm insulation, externally coated in RAL color.
  • Fast direct space heating, no preheating period required.
  • Electrical panel for automatic – safe operation, connectable to room thermostat.
  • No need for anti-frost protection, due to water piping absence.
  • Vertical or horizontal configuration.
  • Fresh air intake up to100%, with mixing box and damper.
  • Possible use for ventilation during the summer months.
  • G4 category air-filter on the air-intake.
  • Centrifugal, low noise fan, direct or belt driven, designed for the required static pressure.
  • Stainless steel AISI 304 combustion chamber, long lifetime.
  • 30 years constructional experience.

Accessories

  • Air distribution plenum 1-4 directions.
  • Mixing box with damper for fresh-air intake.
  • Air-ducts & Sound attenuators.
  • Fuel gas piping systems.

ΤYPE DH 35 45 60 85 100 145 200 250 300 350
Heating Capacity [KW] 40.7 52 70 100 116 169 232 290 349 407
Nom. Air-Flow [m3/h] * 2800 3800 4500 6500 7500 10500 15000 18000 22000 26000
Fan Power [kW] ** 0,75 0,75 1,1 1,5 2,2 3 4 5,5 5,5 7,5
Voltage [V] ~ 50 Hz 230/400 230/400 230/400 400 400 400 400 400 400 400
Dimensions (mm)
Α 800 1000 1000 1200 1200 1300 1550 1650 1650 2050
Β 600 700 700 800 800 1000 1150 1250 1250 1350
C 1270 1500 1500 1720 1850 1850 2400 2680 2680 2730
H 360 360 360 360 360 360 360 460 460 460
Ø 145 145 145 195 195 195 245 245 295 295
F 1100 1320 1320 1500 1600 1600 2000 2300 2300 2350

* ΔΤ= 43 Κ, Tin= 20 oC
** ΔPst,ext = 200 Pa

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