VENTBOX 800 Public

Public buildings and schools

The decentralized heat recovery unit VENTBOX 800 Public is designed for installation in enclosed spaces of school buildings and other public spaces. It meets strict hygienic limits for acoustic emissions and air filtration. Ventilation performance, low acoustic emissions, compact dimensions and efficient heat recovery allow installation even in buildings, where extensive air ducts cannot be built.

The VENTBOX 800 Public ventilation unit has its own solution for connecting exterior air inlets, for example through a window infill. The termination of air ducts on the outside of the building is always done with a requirement for aesthetic appearance and functionality. The ventilation unit is equipped with an efficient heat exchanger and reduces heat losses that occur during conventional ventilation ‘only by opening windows’ or other economically and technically unsuitable methods of ventilation. It ensures a permanent reduction in CO₂ concentration and maximum elimination of outdoor odors using carbon filters and brings the comfort of fresh clean air. The installation of a unit with an enthalpy exchanger does not require connection to a waste pipe for condensate drainage.

Technical parameters Demand

Efficient exhaust air removal
Fresh air without allergens and pollen
Radon-free house

Recommended area	up to 600 m²
Energy class	A+
Installation option	Floor mounting
Dimensions (h × w × d)	2 050 × 1 005 × 740 mm
Weight [kg]	112 kg
Voltage	230 V AC/50 Hz
Electric current without preheating [A]	1.5 A
Electric current including preheating [A]	12 A
Max. input power of the unit without preheating [W]	318 W
Max. preheating input power [W]	2 400 W
IP coverage	30
Air flow [m³/h]	120–800 m³/h
Maximum airflow in BOOST setting [m³/h]	800 m³/h
Reference air flow [m³/h]	560 m³/h
Displacement pressure [Pa]	50–200 Pa
Acoustic energy L_WA [m³/h/Pa/dB]	560 m³/h/50 Pa/49 dB
Heat transfer efficiency / Flow rate	82 %/800 m³/h; 82 %/560 m³/h; 81 %/120 m³/h
Electrical input (without preheating)	240 W/800 m³/h; 105 W/560 m³/h; 20 W/120 m³/h
∅ of the connection necks [mm]	250 mm
Type of pipe for condensate drainage	HT DN 32 mm
Specific power consumption SPI* W/m³/h	0,19 W/at reference airflow 560 m³/h and disposition pressure of 50 Pa
Max. number of all sensors (CO2 / RH / RADON …)	9
Connector for fire sensor or EPS connection	Yes
Automatic frost protection	Yes
Bypass function (exchanger bypass)	Yes
Shock ventilation	Yes
Weekly time mode	Yes
Measuring energy consumption	Yes
Modbus TCP/IP communication	Yes
Modbus RTU communication	Yes
Analogue input	2
Digital input	1
EC motors with a constant flow function	Yes
Filter clogging indicator based on time interval	Yes
Wire pre-filter	Yes
Filter clogging indicator based on filter pressure drop	Yes
Filters supply//exhaust (% of particles captured in a given filter class)	F7 pollen/odour ePM1 70 % (F7 odour optional)

Enthalpy Counterflow Heat Exchanger (ERV)

Enthalpy counter-flow plate heat exchanger (ERV) is an optional part of the heat recovery system which, in addition to heat recovery, also allows moisture recovery, thus supporting the maintenance of optimal indoor air humidity and thus improving the user comfort of apartments and residential buildings. These systems bring many benefits, including energy efficiency, reduced heating costs, and improved indoor air quality.

Working principle of the counterflow exchanger

The enthalpy heat exchanger can be ordered separately or later; after a very simple installation, the entire unit is upgraded with advanced technology.
Ordering code: VENTBOX 800 Public: P-029

Main features and benefits

• Heat exchange – an enthalpy heat exchanger allows heat energy to be transferred from warmer exhaust air to cooler outdoor air, thereby increasing the temperature of the air entering the building in winter. This helps to reduce heating costs because the fresh air is heated passively during the exchange.

• Moisture exchange – in addition to heat, the enthalpy heat exchanger allows moisture transfer. This is important for maintaining optimum humidity indoors. The moisture in the exhaust air is transferred to the supply air, which can be useful in areas with extreme climatic conditions.

• Reduction of losses and pollution – the enthalpy heat exchanger also serves to separate the supply and extract air, preventing the transfer of pollution, dirt and unwanted odours from the outside into the building. This improves the indoor air quality.

• Energy savings – operation without the need to preheat the incoming air down to -5 °C.

Specifications with enthalpy exchanger	VENTBOX 800 Public
Energy class enthalpy heat exchanger	A
Weight of the entire unit	kg
Heat transfer efficiency / Flow rate	76 %/800 m³/h 78 %/560 m³/h 84 %/120 m³/h
Moisture transfer efficiency / Flow rate	56 %/800 m³/h 63 %/560 m³/h 78 %/120 m³/h

ORDERING CODES

Example of ordering code: VB1-0800-PD-PHR
First generation VENTBOX 800 unit for decentralized air distribution, EC constant flow motors Premium version, with standard counterflow plate heat exchanger and righthand connection.

VENTBOX	Generation		Volume flow		Design	Heat recovery unit type		Model / Type	Exchanger type	Connection option
V B	1	-	0800	-	P	D	-	P	H	R
					Public	Decentralized		P - Premium	H - standard E - enthalpy	R - right

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Enthalpy Counterflow Heat Exchanger (ERV)

Working principle of the counterflow exchanger

Decentralized heat recovery unit variant

ORDERING CODES