Compact P - CTS 602 control

The Compact P is a modular compact system that offers not only one but several solutions, thus enabling you to select the solution must suitably proportioned to match the size of your house and accommodate the requirements of your family.

The first step in a Compact P solution is always the Compact P itself, i.e. the basic unit. The Compact P is a complementary ventilation and heating system that provides your house with ventilation, heat recovery and production of sanitary hot water. It ensures a daily air exchange with the removal of dust particles, smells and excess humidity in exchange for a pleasant and healthy indoor climate. When it is hotter inside than outside the house, a built-in bypass makes sure to let cool air directly into the house.

If you want a total solution that covers central heating of the house as well, you should choose a Compact P solution with an outdoor air or ground source heat pump.

Compact P is, as only one out of a few compact systems in the world, passive house certified due to its high efficiency. The certification means that the Compact P is pre-approved for passive housing without any additional documentation ever being needed.

The Compact P series, with both GEO and AIR heat pumps, has achieved the German Smart Grid certification which means it can fit the operation to the power capacity of the power network.


Explore the possibilities of Nilan's passive house certified Compact P solution

Compact P is an energy-efficient total indoor climate solution for all types of low-energy buildings, single-family homes, flats and small office areas in commercial leases with a ventilation requirement of up to 300 m3/h. Compact P has a 180 l hot water tank. 2 layers of glass enamelling to ensure a long lifetime.

Compact P recovers the energy from the extracted air using a highly efficient counter flow heat exchanger. The remaining energy that is not utilised by the counter flow heat exchanger is used by the heat pump to produce hot water, and to further heat the supply air.

The heat pump has a reversible cooling circuit, which means that, in the summer, the unit can cool the supply air by up to 10 °C. Due to the low air exchange, the cooling does not function as an air conditioning system. On cooling, the supply air is dehumidified, which gives a more pleasant indoor climate than is possible with an ordinary ventilation unit without a heat pump.

Compact P is also offered in a Polar version with a built-in preheating element to frost proof the counterflow heat exchanger.

Dimensions (WxDxH) 900 x 610 x 2,065 mm
Weight 202 kg
Plate type casing Aluzinc steel plate, white powder coating RAL9016
Heat exchanger type Polystyrene counterflow heat exchanger
Fan type EC, constant rotation
Filter class Standard ISO Coarse >90% (G4)
Duct connections Ø 160 mm
Condensate drain PVC, Ø 20 × 1,5 mm
External leakage < 1,4% (*3)
Internal leakage < 1,1 % (*4)
Supply voltage 230 V (±10 %), 50/60 HZ
Max. input/power 2,2 kW / 9,6 A (1*) // 3,4 kW / 14,8 A (2*)
Tightness class IP31
Standby power 3 W
Ambient temperature 1,2 kW

Ecodesign/ERP data

Fan data
Motordata (optimalt driftspunkt)

* 1 Input without heating element (accessory).
* 2 Input Compact Polar.
* 3 At ± 250 Pa and 265 m3/h according EN 308/EN 13141-7.
* 4 At ± 100 Pa and 265 m3/h according EN 308/EN 13141-7.

Top cover

To cover the ducting over the unit, Nilan offers a top cover in white-varnished aluzinc (RAL 9016).


Extra heat exchanger of 0.7 m2 in the hot water tank, which can be connected to an approximately 3 m2 solar heating system, or other heat sources.

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.

Safety group

The safety group, which is made of brass, consists of a stop valve with an integral non-return valve, a safety valve and drain cock. It can be installed directly beneath the hot water tank.

Safety features‌

During periods with cooling ventilation, hot water in the tank can reach very high temperatures - up to 80 ºC. A maximum temperature of up to 60 ºC can be set in the control system to prevent scalding, but active cooling is then limited. To make full use of the cooling function, scalding protection should be fitted that mixes hot water with cold to bring the temperature down. If a solar panel is used to supplement hot water heating, scalding protection must be fitted.

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.

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.

Water heating element incl. regulation (duct mounted)

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 duct and must be connected to the primary heating supply. Supplied with two-way adjustment valve, temperature sensor and frost thermostat (not recommended for GEO / AIR).


Consumer profile, water heater L (large)
Energy efficiency class A
Energy efficiency for water heating -
average climate
94 %
Annual electricity consumption - average
1081 kWh/annum
Temperature settings on the thermostat 10 - 65 °C
Sound power level LWA 46 dB(A)
The water heater can function outside
peak load periods (Smart-grid)
Guidelines for assembly, installation and
See installation
Energy efficiency for water heating - cold
94 %
Energy efficiency for water heating - warm
94 %
Annual electricity production - cold climate 1081 kWh/annum
Annual electricity consumption - warm
1081 kWh/annum



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

SEL values according to EN 13141-7 are for standard units with standard filters ISO Coarse >90% (G4) and without heating element.

SEL values comprise the unit´s total power consumption incl. control.

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

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

Temperature efficiency

Temperature efficiency as a function of volume flow qv [m3/h] for unit with counterflow heat exchanger.

Temperature efficiency according to EN13141-7 (2°C / 20°C).

NB! The temperature efficiency, is for the heat exchanger only (without heat pump operation)

Sound data

Sounddata is for qv = 210 m3/h and Pt, ext = 100 Pa in accordance with EN 9614-2 for surface and EN 5136 for ducts.

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

At a given distance, the sound pressure level LpA will depend on the acoustic conditions at the installation site.

COP (air-air)

Heat output factor COP [-] supply air as a function of outdoor temperature t21 [°C] and volume flow qv [m3/h] in accordance with EN14511 at a room temperature t11 = 21°C

COP according EN14511 is calculated for the heat pump and counter flow heat exchanger combined.

Heat output supply air

Heat output Qc [W] as a function of qv [m3/h] and outdoor air temperature t21 [°C]. In accordance with EN 14511, t11=21°C (extract air)

Heat output is the contribution to room heating added to the fresh air via Compact P to the supply air.

The ventilation loss is the heat output that is lost without heat recovery at the given volume flow air.

Tapped water

Tapped volume in litres Vmax [L] from Compact P tank as a function of tapped temperature t [C°] and tank temperature at 40°, 50° and 60°C.

1: Fresh air
2: Supply air
3: Extract air
4: Discharge air

The Compact P is controlled by its CTS 602 touch panel, which provides a wide range of functions, including menu-controlled operation, week programmes, time-controlled filter monitor, fan speed adjustment, temperature control, error messages etc.

The CTS 602's factory settings are default settings that can be adapted to operating needs and requirements, to achieve optimum operation and utilisation of the system.

Operating instructions for CTS 602 can be found in the separate user guide supplied with the system.

Functional overview CTS 602 control panel

Functional overview  



Filter monitor Filter monitor with timer notifies when it is time to change filters. Can be set between 30 and 180 days.  +
Operating mode Can be set to Auto according to set values or set to heating or cooling mode.  +
Stepless regulation The four ventilation steps can be set steplessly 20-100%, with various values for supply air and exhaust air.  +
Humidity control Built-in humidity control can be set to high ventilation operation at high humidity (when in the shower) and low ventilation operation if the humidity in the home becomes too low. +
Active cooling The unit can be set to cool the supply air in the summer, should the need arise. When the heat pump cools, the heat is deposited in the hot water tank, so that you get “free” hot water when the unit is in cooling mode. +
Low outdoor temperature It is possible to lower the ventilation at low outdoor temperature, to avoid the indoor humidity becoming too low. +
CO2 control It is possible to control the ventilation level according to the CO2 level in the home. -
Temperature settings The temperature settings are used by the controller to regulate the operation of the entire system. +
Frost protection The control has an automatic function for defrosting the heat exchanger to prevent formation of ice. +
Frost protection Polar The Polar model has a built-in frost protection preheater to protect the counterflow heat exchanger so  no ice occurs. +
Frost protection EHD The controller can control the EHD damper if the outdoor air enters through roof terminals.  +
Domestic hot water Compact P produces the domestic hot water via the air / air heat pump in the ventilation part. +
Pause domestic hot water It is possible to set the hot water production on pause e.g. if no one is at home. In that way, energy is saved. +
Frost protection domestic hot water To protect the hot water tank, it is fitted with a frost protection function. +
Supplementary electrical heater domestic hot water If the need for domestic hot water increases and the heat pump cannot keep up, a supplementary electrical heater can be activated to heat the domestic hot water. +
Anti-scald protection The control has a built-in scalding protection, which prevents scalding of the users when the hot water tap is opened. +
Anti-Legionella The control has an Anti-Legionella treatment of the domestic hot water that can be activated manually or automatically. +
Anode Electronically monitored anode. Notifies when it is time to replace it to ensure a long service life of the hot water tank. +
Week program A week program can be made with various settings depending on the use of the home. +
User selection program 1 A user selection program enables you to use special settings that override the standard operating settings via a potential-free signal. Used e.g. if a cooker hood is connected to the system. +
User selection program 2 Used as user selection 1, but at the same time has an output signal that can be used e.g. to control a damper. +
Datalog Data logging as well as error messages and warnings. +
Output data All current values in the system operation. Most often used for troubleshooting. +
Emergency stop ventilation Do not turn off the ventilation, as this may damage the unit, duct system and in the worst case the home. But it may be necessary to briefly turn off the ventilation e.g. due to a emergency notification. +


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