Technical data


Unit data:
Min. airflow 330 m³/h
Max. airflow 2,450 m³/h
Power consumption 1.8 kW
Power supply 1 x 230 V + N + PE ∼ 50 Hz
Max. phase current 12.5 A (Power consumption is not sinusoidal)
Operational-ready unit weight 450 kg
Weight for internal transport 284 kg (excl. doors, fan units, bypass section, counter flow heat exchangers and filters)

Ambient temperature (operating)

At temperatures below -25˚C (with outdoor installation), use of a thermostatically controlled heater in automated control box is recommended.

-30°C to +50°C 
Motor and motor control (MC) data
Motor type EC motor
Motor class
in accordance with IEC TS 60034-30-2
IE5 (Ultra Premium Efficiency)
Voltage input 1 x 230 V
Current overload protection Built-in
Regulation Variable via motor control (MC)
Control signal with control system Modbus
Control signal with third party control system 0–10 VDC
Fluid temperature (air) -40°C to +40°C

Fan data  
Max. total efficiency (A-D) 58.1%
ECO measurement set-up (A-D) A
Efficiency level requirements 62N (2015)
ECO efficiency level during optimal operating point 76,2N


Motor data (optimal operating point)
EC motor With motor controller
Power consumption 0.67 kW
Airflow 2286 m3/h
Total pressure 617 Pa
RPM during optimal operating point  2886


- Density = 1.2 kg/m3
- Pressure ratio < 1,11
- other points in acc. with EC327/2011 (see product instructions)

Capacity curves



VEX340 kapacitetskurve

Capacity curve with Coarse 85% filters (M5)
SFP curve
Operating curves
A: Pressure loss supplement with ePM1 55% filter (F7)
B: Pressure loss supplement wit HCE/HCW 
C:   Pressure loss supplement with CCW 


To calculate capacity data use the product selection tools Quickselect and EXselect.

Total energy consumption is divided equally between the extraction and supply air fans.

Power consumption with VEX: P1(W) = SFP (J/m3) x qv (m3/s).

Temperature efficiency


VEX340 temperaturvirkningsgrad


stiplet streg
Efficiency with condensation:
Extract air = 20°C/55 RH
Outdoor air  = -10°C/50 RH
Balance between supply air/extract air = 1,0
Efficiency without condensation with imbalance:
Extract air = 25°C/28 RH
Outdoor air = 5°C/50 RH
Balance between supply air/extract air  = 0,8
fed streg Efficiency without condensation in acc. with EN308:
Extract air = 25°C/28 RH
Outdoor air = 5°C/50 RH
Balance between supply air/extract air = 1,0


The temperature efficiency of the VEX units is shown at different airflow ratios, calculated as:

t2,1 = Temperature of outdoor air (fresh air)
t2,2 = Temperature of supply air
t1,1 = Temperature of extract air
Sound data



VEX340H LWA1 - Suction side

VEX340 lydkurve sugeside

VEX340H LWA2 - Pressure side

VEX340 lydkurve trykside

VEX340H LWA3 - Surroundings

VEX340 lydkurve omgivelser



Sound output level
Suction side (outdoor air/extract air):
LW1 = LWA1 + KW
LWA1 read

Sound output level
Pressure side (supply air/exhaust air):
LW2 = LWA2 + KW
LWA2 read

Sound output level
LW3 = LWA3 + KW
LWA3 read

Sound output level at 1 m distance
LpA3 = LWA3 + KpA
LWA3 read



Hz Ranges 63 125 250 500 1K 2K 4K 8K
LWA1 I 18  8 -11 1 -12 -20 -25 -32
II 21 11 -1 -2 -11 -21 -27 -21
III 24 14 -6 -8 -17 -24 -21 -14
LW2 I -1 -5 -5 -2 -5 -7 -15 -27
II 8 1 4 -6 -6 -8 -18 -23
III 18 8 0 -6 -5 -9 -21 -18
LW3 I 20 13 1 -6 -8 -12 -17 -21 -15
II 18 12 5 -5 -10 -13 -15 -12 -15
III 13 9 0 3 -10 -12 -11 -9 -15


Measurement arrangements

VEX340 lydeffektivitet


VEX340 lyd til omgivelser


Dimensional drawings




1) Allow a distance for service in front of the unit that is equivalent to the unit depth
2( Allow min. 200 mm free height for service



1) Allow a distance for service in front of the unit that is equivalent to the unit depth
2( Allow min. 200 mm free height for service


VEX340-OD for outdoor installation (accessory)

With outdoor installation, the unit must be secured to the building at the points shown in the instructions.

VEX340 right målskitse udendørs montage

SPLIT unit


If the VEX340 needs to be transported through passages that would normally be too small for it, if it can be ordered as a SPLIT model.

As a SPLIT model, the unit is delivered assembled but not sealed, so that it can be split into smaller sections on the site and transported in smaller sections to the location where it is to be installed.

This work must be carried out by a certified EXHAUSTO service technician.


VEX340 split


Cooling and heating coils

The following cooling and heating coils are suitable for VEX340

Type Model
HE electric heating coil  HE400
HW water heating coil HW400
CW cooling coil (water)  CW400I
DX cooling/heating coil DX400U

Add all about the product series VEX340H


Get free advice on ventilation products and system solutions

Export Requests:
Odensevej 76
DK 5550 Langeskov

Tel +45 6566 1236

Calculation programs

Use EXHAUSTO's free calculation programs for calculating ventilation plant and system solutions

Go to Calculation Programs
Vex overview

VEX Summary

Get a quick overview of our entire range of compact VEX air handling units with heat recovery.

View the VEX summary here