Apartment buildings – Decentralised solution

With a decentralised solution for ventilation in apartment buildings, each apartment has its own system for ventilation. This system allows residents to control their own indoor climate. Each air handling unit can even be monitored by the building’s automation system via a Modbus link for alerts and service call-outs.

Many options for placing a unit

The simplest solution is often to place the ventilation unit in the kitchen over the cooker; hence the name “spice-rack unit”. Alternative placements would be the bathroom or inside a large wardrobe.

For some housing types, there might be the option of installing the unit in a stairwell or gallery. The advantage of this is that servicing and maintenance can be performed without engineers having to be given individual apartment access.

Make the most of air flow in the cooker hood

Installation and investment costs will be lower if the ventilation unit’s extract air fan is also used for the cooker hood’s air flow. This is achievable regardless of where the unit is installed. Either directly beneath the unit for a kitchen installation, or, alternatively via a fifth channel. The air flow from the cooker hood passes the heat exchanger, meaning that it does not have to be reset. The unit can also be controlled directly via the cooker hood, and the system automatically balances the air flows by activating the cooker hood.

Outdoor air and exhaust air via the facade is often the best solution

If the outdoor air intake and exhaust air outlet can be located on the facade of the building this then results in minimal ducting and pressure drops. This makes it the most economical and energy-efficient solution. The design, surroundings and local bye-laws may, however, prevent implementation of this solution. If so, the conventional alternative is to use the shaft or main ducts up to the roof.

Advantages of a decentralised solution  

  • With a unit installed in each apartment, the occupants enjoy all the benefit of controlling their own indoor climate.
  • The system construction is simplified by the fact that the apartments do not require fire separation
  • Minimal ducting results in an energy-efficient and quiet system.
  • The unit is user-adjusted from a control panel on the wall, directly from the cooker hood or via an app.
  • Equipped with a sensor package for humidity, CO2 or VOC, the unit auto-adjusts entirely in response to demand