50 Direct MT

Logic Heat Interface Unit (HIU) Direct - 50 Direct MT

The Ideal Heat Interface Units (HIU) are heat energy transfer units, designed for use in conjunction with centralised boilers, district heating or central energy systems. The function is to efficiently transfer heat from
the plant room to the individual dwellings central heating (CH) and domestic hot water (DHW) systems.

The Logic Direct HIUs are the latest 'intelligent’ range of HIU from Ideal. The Logic HIU is the complete solution for instantaneous hot water production and space heating control. The Direct wall mounted HIU,
providing instantaneous priority direct hot water (DHW) and modulated central heating (CH). 

Ideal Logic Direct Heat Interface Unit front


  • 2 year parts and labour warranty
  • All the Logic HIUs incorporate a spacer piece which can be easily removed and a heat meter fitted inside the unit. This allows the energy used by each individual apartment to be recorded and charged accordingly
  • Internal electronic control unit with LCD display
  • Compact and lightweight
  • Fully insulated EPP front cover
  • Ability to pre-heating of the DHW exchanger
  • Single plate design hydraulically separates the domestic water with the space heating supplied directly from the central primary supply
  • Built in differential pressure control valve (DPCV)
  • Compact Wall Hung
    Compact Wall Hung
  • 2 Year Warranty
    2 Year Warranty
  • Erp Prepared
    Erp Prepared


Logic Heat Interface Unit (HIU) Direct 50 Direct MT

Height550 mm
Width450 mm
Depth65 mm
Heating Set Point50-75°C
Nom. heating exhangner net outputAs primary heating circuit kW
Secondary circuit (Max pressure rating)Maximum pressure rating: 10 bar as primary and heating circuit controls permit bar
Pump UPSUPS 15/60
Pump bypass setting0.45 bar
Heating control cicuitVOLT FREE
Maximum working pressure (primary)10 bar
Maximum temperature85°C
Max. percentage of glycol30%
Max. recommended primary cicuit flow rate1.2 m³/h
Min. differential pressure on domestic water modulating valve^p 0.35 bar
Set Point DHW temperature42 to 60°C
Max. Domestic hot water pressure10 bar
DHW cicuit max. flow rate18 l/m
Min. flow rate to activate domestic flow sensor2.7 l/m
Max. Differential pressure on domestic water modulating valve0.9 bar
Nom. DHW heat exchanger net output50 kW
Power supply230 V (ac)±10% 50Hz
Max power consumption105 W
Protection classIP 40
Actuatorstepper 24 V
ProbesNTC 10 kΩ
FrameRAL 9010 sprayed steel
Protective shell coverEPP (Expanded polypropylene)
Componentsbrass BS EN 12165 CW617N
Pipesstainless steel
Exchangerbrazed stainless steel

Standard and Optional kits


  • CF ECHO II ultrasonic meter
  • CF ULTRAMAXX V ultrasonic meter
  • Flushing Bypass


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Brochures Expand/Close
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HIU Product Guide 2017
Technical Information
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211349 HIU 50 MT Direct Spec Sheet.pdf
211350 HIU 50 HT Direct Spec Sheet.pdf
BIM components
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BIM files available for this product - Please click here to download.
Installation and user guides
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HIU installation and servicing manual.pdf
Logic HIU Installation & Servicing 211203-4.pdf

Other Logic Heat Interface Unit (HIU) Direct models available