Comfort 5000

Comfort 5000 is a ventilation unit with heat recovery. It is suitable for centralised ventilation of residential buildings, ventilation of schools, offices and commercial buildings. 

The unit is available in both a right-facing and a left-facing model. It is well insulated and you can therefore install it outside the climate screen. If the unit is to be installed outdoors, you can order a top cover to protect the unit from rain and snow. 

With its modulating 100% bypass, Comfort 5000 is able to regulate the supply air temperature efficiently. 

All components are carefully selected to maintain the highest level of quality, and they are tested throughout the production process. Once fully built, the units are likewise tested before they leave the factory. The thorough quality control are a reflection of our high standards. Due to these, our products last for many years. 

Airflow (see planning data for SEL/SFP values)

Min : 500 m3/h
Max : 5000 m3/h
Dimensions (W x D x H) 2650 x 1250 x 1500 mm
Weight 617 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 800 x 500 mm
Condensate drain PVC Ø 20 x 1,5 mm
Power supply 3 x 400V 50/60 Hz
Power consumption 3,9 kW / 3 x 13 A
Standby power 3 W
Tightness class IP31
External leakage underpressure < 0,9% (*1)
External leakage overpressure < 0,9% (*2)
Internal leakage < 0,5% (*3)

*1 - Testet according to EN13141-7 at 250 Pa
*2 - Testet according to EN13141-7 at 100 Pa
*3 - Testet according to EN13242-7 at 100 Pa


Capacity of standard unit as a function of 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 70% (F7) filter in fresh air and no heating element 

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

The dotted curve indicates the pressure loss for a heating element.

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

Temperature efficiency

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

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

Sound data

Sound data for qv = 4000 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.

Dimensional drawing Comfort 5000 (Left version):

All dimensions are in mm.

1: Fresh air
2: Supply air
3: Extract air
4: Discharge air
5: Condensate drain

The CTS602i control system is an advanced control system with many settings options. The control system is supplied with factory default settings that can be adapted to the operational requirements in order to achieve best possible operation and utilisation of the unit.

The HMI Touch panel provides an overview of the current operation of the unit, and the structure of its menu makes it easy to navigate for both user and installer.

External communication
The CTS602i control system has an open Modbus RS485 protocol that can be used for communication via external CTS systems.

Functions overview   +Standard
Alarms Description of errors indicated with alarms. Alarm log displaying the latest 16 alarms. +
Joint alarm The CTS602 control system has an output signal that is activated in the case of an alarm. It can be connected to, for example, external automation.  
Filter monitor Filter alarm with timer that can be set to 30/90/180/360 days. +
Data display An overview of the current operation with regards to temperatures, fan speed level etc. +
Week program The CTS602 control system has 3 week programs that can be set individually (the default setting is “off”). +
Humidity control system Enables a higher or lower degree of ventilation at a high/low level of humidity. -
Air quality Enables you to adjust the degree of ventilation depending on the CO2 level in the air. -
Winter low You can prevent a low level of humidity in the dwelling by activating low ventilation at low outdoor temperatures. +
Temperature regulation Enables you to control the operation of the unit in accordance with the room temperature. +
Summer/winter mode You can set the unit to operate in summer or winter mode.  
Language You can choose from more than 10 languages in the control panel. +
User levels The menu in the control panel is divided into 3 user levels: User/Installer/Factory. +
User selection 1 Enables you to override the operating mode via an external potential free signal. +
Electrical after-heating element An electrical after-heating element allows you to control the supply air temperature. In this way the unit can help heat the dwelling. -
Water after-heating element A water after-heating element allows you to control the supply air temperature. In this way the unit can help heat the dwelling. -
Frost protection In order to protect a potential water after-heating element against frost damage, the unit will stop and display an alarm if the temperature in the water after-heating element becomes too low. -
Air exchange Stepless setting of four fan speed levels. The supply air and the extract air can be set individually. +
De-icing Based on temperature, this automatic function de-ices the counterflow heat exchanger if ice has formed within it. +
Room low Safety function that will cause the ventilation unit to stop if the heating system for the dwelling fails. This will prevent the unit from cooling the dwelling even further. +
External heating The ventilation unit can control an external heat supply in accordance with the current room temperature. +
External fire automation system You can connect the ventilation unit to an external fire automation system or to a fire thermostat. This will signal to the unit whether to stop or continue operation. +
Integral fire automation system The ventilation unit is available with an integral fire automation system that can control fire and smoke dampers. -
Pressure sustaining regulator You can install a pressure sustaining regulator on the side of both the extract air and the supply air. -
Delayed start-up You can activate a delayed start-up of the fans if you install, for instance, a shut-off damper. +
Restore settings You can save the current settings and subsequently restore them if, for instance, the user has altered the settings on the unit. You can also reinstall the default settings. +
Manual operation Different functions can be tested manually. +
Energy saving function You can activate a power saving function of the operation. +
Modbus  You can set the Modbus address of the unit. The default setting is 30. +
Data logging It is possible to log the operational data of the unit every 1 - 120 min. Alarms are logged when they occur. +
Control panel You can choose from 2 different images for the main screen. +

You can find further information about all the functions in the Software and Installation instructions for the unit.


ATTENTION! When positioning the unit, you should always consider future services and maintenance. It is recommended that you leave a minimum of 100 cm of clear space in front of the unit.

It must be easy to replace filters and it must be possible to replace, for instance, fans and other components.

ATTENTION! The unit must be level to enable proper drainage from the condensate tray.

The unit makes little noise and produces only weak vibrations, but you should still take into account potential vibrations that can spread from the unit to individual building components. In order to separate the unit from its foundation, it is therefore recommended that you install vibration absorbers under the unit. There should be approx. 10 mm distance to other building components and to permanent fixtures.

Condensate drain

ATTENTION! You MUST install a water trap in connection with the condensate drain to ensure that condensate water can drain away. If you set up the unit outside the climate screen, it is important to use a heating cable to prevent the condensate drain from icing up. Frost protection of the unit is the installer's responsibility.


Trade mark Nilan
Model Comfort 5000
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 80,5 %
Reference flow rate (supply air) 0,951 m3/s
Reference flow rate (extract air) 1,064 m3/s
Effective electric power input (kW) (supply air) 1,279 kW
Effective electric power input (kW) (extract air) 1,097 kW
SFPint 872 W(m3/s)
Velocity at design flow rate 0,36 m/s
Nominal external pressure 275 Pa
Internal pressure drop of ventilation components (supply air) 155 Pa
Internal pressure drop of ventilation components (extract air) 228 Pa
Static efficiency of fans (supply air) 67,9 %
Static efficiency of fans (extract air) 67,9 %
Maximum external leakage rate 1,2 % v/400 Pa
Maximum internal leakage rate 0,9% v/250 Pa
Energy classification of ISO ePM10 >60% (M5) bag filters (extract air) E
Energy classification of ISO ePM1 50% (F7) bag filters (outdoor air) C
Visuel filter warning An alarm on the user panel appears when filters need changing. To maintain the performance and energy efficiency of the unit it is very important to change filters regularly.
Sound power level (LWA) 54 dB(A)

Motor and motor control

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
Fluid temperature (air) -20 / +40 ºC
Ambient temperature (operating) -20 / +40 ºC

Fan data for ecodesign

Fan data  
Max. total efficiency (A-D) 67,9 %
ECO measurement set-up (A-D) A
Efficiency level requirements 62N (2015)
ECO efficiency level during optimal operating point 75,3
Motor data (optimal operating point)  
EC-motor With motor controller
Absorbed power 1,954 kW
Airflow 4863 m3/h
Total pressure 897 Pa
RPM during optimal operating point 2311

Conditions according with EC327/2011