The climate crisis calls for other solutions

VEX4000RHP – Reversible heat pump for VEX4000
Ventilation, heating and cooling in one unit – simple, reliable and energy-efficient
The escalating climate crisis has led the EU to decide on quite ambitious climate targets for reducing CO2 emissions.
A prerequisite for achieving these goals is a general electrification of energy consumption, i.e. energy consumption is “moved” from fossil fuels to electricity. Here, the heat pump is an energy-efficient and sustainable solution, as the energy used to move heat out of or into the building is far less than the heating/cooling output achieved. The sustainability of a heat pump is further increased if it is supplied with electricity from “green” energy sources.
Heat pump in combination with ventilation
Requirements for energy efficiency and low energy consumption for ventilation solutions have given greater focus on combining heat recovery with an integrated heat pump. By combining ventilation, heating and cooling in one unit, a solution is achieved that is both very energy-efficient and much simpler than traditional cooling solutions with cooling machine and piping on the roof.
VEX4000RHP – reversible heat pump for VEX4000
By choosing VEX4000RHP, you get ventilation, heating and cooling in one unit – simple, reliable and energy-efficient. This means that with one calculation in EXselectPRO you get an overview and technical data for the entire installation. The installation itself becomes much simpler when the entire solution is assembled in one unit, and maintenance becomes simpler and cheaper.
The solution is also space-saving, as the integrated solution frees up space that would otherwise be occupied by heating and cooling installations.
Other benefits include:
- Low energy usage
- Easy to set up, install and maintain
- High reliability and long service life
- Small and compact design
- Designed according to VDI6022-1
Examples of services
Cooling and heating capacity, calculated for VEX4030 RHP at airflow 4,342 m³/h.
Pre-requirements:

Winter: heat
Outdoor temperature: -10 to 10°C Supply air temperature: 22°C Extract air temperature: 22°C Humidity (RH): 40%

Summer: Cooling
Outdoor temperature: 26 to 35°C Supply air temperature: 17°C Extract air temperature: 25°C Humidity (RH): 50%
The diagram shows how much of the capacity comes from the heat exchanger and heat pump respectively at different outdoor temperatures – under the given conditions. The bottom row of the diagram (COP/EER) refers to the cooling/heat pump’s energy efficiency at the individual outdoor temperatures.
How to calculate the efficiency of the cooling/heat pump
Process: | Unit: | Explanation text: | Example |
Cooling | EER Energy Efficiency Ratio | Indicates the ratio between the cooling output the heat pump delivers and the energy it uses | Energy consumption = 3.0 kW EER = 15.8/3.0 = 5.26 |
Heater unit | COP Coefficient of Performance | Indicates the ratio between the heat output the heat pump delivers and the energy it uses | Energy consumption = 1.5 kW COP = 15.8/1.5 = 10.53 |
Two variants
We offer VEX4000 with reversible heat pump in two variants
VEX4000RHP-ER
Here the rotary heat exchanger is located between the evaporator and the condenser.
With this solution you get:
- Lowest energy consumption
- Option of cooling recovery
VEX4000RHP
Here the heat exchanger and the heat pump are placed in separate modules. This solution can be selected with either rotary or crossflow heat exchanger.
With this solution you get:
- A compact solution, i.e. easier transport of modules
- No need for defrosting