Comfort 600

Comfort 600 is for anyone who wants ventilation with highly efficient heat recovery and comfort heating.

These systems extract hot, humid air from e.g. the kitchen, bathroom and utility room, at the same time removing dust particles, moisture and odours from the home. Furthermore, the energy from the extract air is used to heat the incoming air. Comfort 600 can replace 800 m³ air per hour.

The systems can be equipped with supplementary heating coils that can be connected to an electric or central heating system. The system will produce a comfortable incoming air temperature even in the coldest winter weather. When you buy a Comfort system, you get a comfortable and healthy indoor climate and cost savings on your heating bill.

Comfort 600 is suitable for locating in an attic space.

The Comfort 600 is an energy-efficient ventilation unit with heat recovery for homes and smaller commercial buildings with a ventilation requirement of up to 800 m3/h.

This unit has been thoroughly tested, with improvements being continually made during its manufacture for more than 15 years. These have focused on low energy consumption, easy user operation and maintenance.

The Comfort 600 is a compact unit which can be ordered as a left- or right-handed model.

The Comfort 600 is factory tested and ready for use. Installation and commissioning must be performed by an authorised electrician.


Dimensions (WxDxH) 1,200 x 950 x 630 mm
Weight 101/75 kg (*1)
Plate type casing Aluzinc steel plate
Heat loss casing 59 W/-59 W (*2)
Heat exchanger type Polystyrene counterflow heat exchanger
Fan type EC, constant volume
Filter class ISO Coarse >90% (G4)
Duct connections Ø 200 mm
Condensate drain PVC, Ø 20×1.5 mm
External leakage < 0.1 % (*3)
Internal leakage < 3.6 % (*4)
Supply voltage 230 V (±10 %), 50/60 HZ
Max. input/power 1145 W/7.1 A (*5)
Tightness class IP31
Standby power 4 W
Ambient temperature -20/+40 °C

Ecodesign/ERP data

Fan data
Motordata (optimalt driftspunkt)

*1       75 kg is without side plates and exchanger.
*2       59 W: Outdoor air temperature -12 °C. Fitting location -12 °C.
          Extract air temperature 20 °C (room).
          -59 W: Outdoor air temperature -12 °C. Fitting location 20 °C.
          Extract air temperature 20 °C (room).
*3      At ± 250 Pa and 600 m3/h according to EN 308/EN 13141-7.
*4      At ± 100 Pa and 600 m3/h according to EN 308/EN 13141-7.
*5      Input without heating element (accessory).
*6      Power consumption on continuous operation for system with
          SFP value 1.000 J/m3 at 500 m3/h.

CO2-sensor – CTS 602 control

With a CO2-sensor installed, the ventilation speed can be pre-programmed with CTS 602 to run at a higher ventilation steps when CO2 reaches high level in the extract air. CO2-level is programmable.

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.

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.


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).

Pollen filter - ISO ePM1 50-65%

A pollen filter class ISO ePM1 50-65% can be fitted in the unit. The pollen filter is fitted with the ISO Coarse >90% (G4) plate filter.


An EM-box allows heat recovery from the air from the range hood and thereby helps to heat the supply air. The EM-box is equipped with a steel filter which efficiently cleans the range hood air of fat particles and thereby protects the system.


Expansion PCB

The expansion PCB provides additional functions for the CTS 602 control unit.

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.


Unit data for ecodesign

Trade mark Nilan
Model Comfort 600
Type Two-way ventilation unit not for residential
Type of drive Variable speed drive VSD
Type of heat recovery system Counterflow heat exchanger
Thermal efficiency of heat recovery 79.6%
Reference flow rate (supply air) 0.1594 m3/s
Reference flow rate (extract air) 0.1404 m3/s
Effective electric power input (kW) (supply air) 0.209 kW
Effective electric power input (kW) (extract air) 0.214 kW
SFPint 413 W/(m3/s)
Velocity at design flow rate 0.022 m/s
Nominal external pressure 250 Pa
Internal pressure drop of ventilation components (supply air) 123 Pa
Internal pressure drop of ventilation components (extract air) 137 Pa
Static efficiency of fans (supply air) 57.4 %
Static efficiency of fans (extract air) 57.4 %
Maximum external leakage rate 1.5 % v/400 Pa
Maximum internal leakage rate 3.6 % v/250 Pa
Energy classification of M5 bag filters (extract air) E
Energy classification of F7 bag filters (outdoor air) C
Visuel filter warning An alarm on the user panel appears when filters need changing
Sound power level (LWA) 56 dB(A)



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 Coarse >90% (G4) 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.


All dimensions are in mm.

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

The Comfort 600 is controlled using its CTS 602 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, supply-heating element control, error messages etc.

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

There is an option for selecting between 2 front page images for the main screen.

Operating instructions for the CTS 602 can be found in a separate user manual supplied with the unit.

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


Functional overview CTS 602 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 The unit has 3 weekly programmes (with a factory setting of “off”)
• Programme 1: for working families
• Programme 2: for stay-at-home families
• Programme 3: for businesses
There is also an option for you to set your own weekly programme.
User option
1 & 2
This allows you to override the operating mode in the main menu via an external potential-free contact or PIR sensor.  +
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
Filter monitor Filter monitor with timer (factory setting of 90 days). Adjustable to 30/90/180/360 days.  +


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.  +
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.
• 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:
• T3 EXHAUST (extract air)
Air volume Allows you to set four ventilation steps stepless. 
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 (can only cool with outdoor temperature) and
cool recovery (can only cool with indoor temperature).
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 water 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/Polish).  +


About Nilan

Domestic solutions

Commercial Solutions 

Find Dealer

Find din Nilan Forhandler


Helsinki, Finland
13th - 15th of April 2021

Odense, Denmark
21st - 23rd April of 2021
Nilan A/S · Nilanvej 2 · 8722 Hedensted · Denmark · Phone +4576752500 ·
Privacy- and cookiepolicy