Comfort 1200

The Comfort 1200 is a passive heat recovery unit, specially developed for commercial buildings which require air renewal up to 1,400 m³/hour.

The unit removes the hot, humid air from the building and injects temperate air. The energy in the extract air is recovered and transferred to the incoming air via a countercurrent heat exchanger. The Comfort 1200 comprises two energy-saving EC fans, a countercurrent heat exchanger and two panel filters which filter out dust particles. The unit is available with a supplementary heating element so that the incoming air has a pleasant temperature even on the coldest winter days.

The units are compact which means that they are easy to maintain and can be located even in restricted spaces. The unit is controlled by our CTS 602i HMI Touch panel.

The Comfort 1200 is a ventilation unit suitable for central ventilation of residential buildings, schools, offices and business facilities with a ventilation requirement of up to 1400 m3/h.

Every component has been carefully selected with a view to unsurpassed quality and each component is tested throughout the entire production process, as are the finished units before leaving the factory. This quality control reflects our high standards, which not only exceed market requirements but also take them several steps further.

Dimensions (WxDxH) 1815 x 825 x 970 mm
Weight 380 kg
Plate type casing Aluzinc steel plate
Heat exchanger type Aluminium counterflow heat exchanger
Filter class Standard bagfilters ISO ePM10 >60% (M5) Extract air and ISO ePM1 50% (F7) Fresh air
Duct connections Ø 315 mm
Condensate drain PVC, Ø 20×1.5 mm
External leakage < 1.45 % (*1) / < 2.14 % (*2)
Internal leakage < 2.90 %
Supply voltage 230 V (±10 %), 50/60 HZ
Max. input/power 500 W
Tightness class IP31
Standby power 4 W
Min. Air volume 400 m3/h
Max. Air volume 1400 m3/h
Motor type EC-Engine
Motor class in accordance with . IEC 60034-30 IE3 (Premium efficiency)
Voltage input 1 x 230 V
Current overload protection Built-in
Control signal with third party control system 0 - 10 V DC
Fluid temperature (air) -20 / +40 °C
Ambient temperature (operating) -20 / +40 °C

*1    External leakage underpressure
        At ± 250 Pa and 1200 m3/h according EN 308/EN 13141-7.
*2    External leakage overpressure
        At ± 100 Pa and 1200 m3/h according EN 308/EN 13141-7.
*3    At ± 100 Pa and 1200 m3/h according EN 308/EN 13141-7.


Water heating element incl. regulation

The supply temperature can always be raised to the required level using a water heating element. The water heating element is designed to be built into the unit and must be connected to the primary heating supply. Supplied with two-way adjustment valve, temperature sensor and frost thermostat (expansion PCB required).

Electrical heating element incl. regulation

When you fit an electrical heating surface, you can raise the fresh air temperature to the desired level at any time. The electrical heating surface is supplied ready to fit into the fresh air duct and, for easy fitting, the device is pre-fitted with all the required sensors.


Electrical pre-heating element (Frost protection)

An electrical pre-heating element heats up the outdoor air before it enters the unit. This avoids having to defrost the unit, resulting in a loss of power.

There are temperature sensors supplied to be fitted in the ducts.

Installation kit

The installation kit comprises of four vibration absorbers and a water trap for the condensation outlet. The water trap can be ordered separately.

Heating cable

To protect the condensation outlet against frost, a 3 metre-long self-regulating heating cable can be ordered.


Top cover

If the unit is going to be installed outside, it is possible to order a top cover which protects the unit against rain and snow.


Pressure transmitter

The extraction and/or supply fan can be operated with the aid of one or two pressure transmitters.



Capacity of standard unit as a function of af qv and Pt, ext.

SFP values according to EN 13141-7 are for standard units with ISO ePM10 >60% (M5) filter in extract air, ISO ePM1 50% (F7) filters and without heating element.

SFP values comprise the unit´s total power comsumption incl. control.

Conversion factior: J/m3 : 3600 = W/m3/h

Attention! The SFP values are measured and stated as a total value for both fans.

Temperature efficiency

Temperature efficiency for units with counterflow heat exchanger according to EN308 (dry).

Temperature efficiency EN308:
ɳ t = (tsupply air-tfresh airt)/(textract air-tfresh air)

Sound data

Sound data for qV = 300 m3/h and Pt, ext = 100 Pa according to EN 9614-2 for surfaces and EN 5136 for ducts.

Sound output level LWA drops with falling air volume and falling back pressure.

Sound output level LpA at a given distance will depend on acoustic conditions in the place of installation.


The Comfort 1200 is controlled using its CTS 602i HMI touch panel, featuring a wide range of functions, e.g., menu-controlled operation, weekly programme settings, filter monitor with timer, fan speed adjustment, summer bypass, post-heating element control, error messages etc.

The CTS 602i comes with factory settings, including a default setting which can be customised to operational requirements to achieve optimum operation and utilisation of the system.

1: Fresh air
2: Supply air
3: Extract air
4: Discharge air
5: Condensate drain
6: Electric and water heating

T2/T7: Supply air sensor
T9/TC: Heating element frost protection
T3: Extract air sensor
T4: Discharge air and defrost sensor
T8: Fresh air sensor
T10: Room sensor


Functional overview CTS 602i overview

Functional overview  

 + Standard

- Accessories

3 levels The control function is divided into 3 levels: User/Service/Factory with various options at each level  +
Weekly plan There is an option for you to set your own weekly programme.  +
User option 1 This allows you to override the operating mode in the main menu via an external potential-free contact or PIR sensor.  +
User option 2 With an Expansion PCB  mounted, allows you to make additional connections, e.g.
• User option 2 overrides User option 1
• Up to 500 W direct
• Output relai
• Switching the central heating system on/off
Alarms Alarm log featuring the last 16 alarms.  +
Datalog Possible to log data. Kapacity 46.000 logs
• Adjustable between 1 and 120 minutes
• If “OFF”, only events and alarms are logged
Pressure controlled 
filter monitor
With a built-in pressure controlled filter monitor.  +

Modulating bypass   

Bypassing the outdoor air reduces heat recovery when heat recovery are not needed.  +
Air quality Allows you to choose whether to switch humidity sensors and/or CO2 sensors on and off.  +/-
Humidity control Allows you to set a higher or lower ventilation step in the case of high/low air humidity.  +
CO2 control Allows you to set a higher or lower ventilation step in the case of a high/low CO2 level.  -
Summer/Winter operation Possible to set operation for summer and winter  
Winter low Allows you to select a low ventilation step in the case of low outside temperatures.  +
Defrost function Temperature-based automatic function for defrosting the heat exchanger.  +
Frost protection In case of failing heating system, the unit is turned off to avoid further cooling with a risk of the water heating coil frost bursting.  +
Temperature control Allows you to select the temperature sensor which will control the unit.
• T15 ROOM (panel sensor)
• T10 EXT (fitted in a representative extraction valve)
• T3 EXHAUST (extract air)
Room low Stops the unit at a low room temperature. Hereby is cooling of the home avoided in case of a failing central heating system. Standard set to OFF. Can be set from 1 to 20 degrees and is controlled by:
• T15 ROOM (panel sensor)
• T10 EXT (fitted in a representative extraction valve)
• T3 EXHAUST (extract air)
Air volume Allows you to set four ventilation steps. Supply air and extract air are set individually.
Step 1 < 25% - Step 2 < 45% - Step 3 < 70% - Step 4 < 100%
External firealarm Possible to connect the unit to external firealarm.  +
Joint alarm Outlet for joint alarm  +
Constant pressure control Allows control from both the extract air and supply air side.  -
Cooling Via bypass.This allows you to choose whether to run the system at a higher or the highest ventilation step during cooling.
The weekly programme has an option for setting cooling at night.
Intake air control Allows you to set the regulator to control the intake air temperature/supply air
(only available if the control unit has been configured for a supply-heating element).
External heating element • Temperature sensor T7 is an supply air sensor
• Integrated frost protection for external water heating element
• Motorised valve and circulation pump control unit
External electric heating element • Temperature sensor T7 is an supply air sensor
• Overheating protection
Delayed start-up There is a possibility for a delayed start-up by the fans, when a closing damper is installed.  +
Reset Allows you to restore the factory settings.  +
Manual test Allows you to test the unit’s functions manually.  +
Language Option for setting the relevant language (Danish/Finnish/Norwegian/Swedish/German/English/French).  +


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