Where to place
ventilation systems?

The physical conditions in the building will often define the system you choose. Ideally, it is placed together with the other technical installations of the home in a way that allows users to easily check filters every six months.

In apartment buildings, it will often be an advantage to place a system over a suspended ceiling or in the cabinet for technical installations which is often located in the entrance area.

For single family dwellings with unused lofts, a horizontal model placed in the ceiling will often be the preferred solution. Such a model takes up no square meters in the house itself and it makes duct installation easier.

Dantherm has residential ventilation units suitable for all physical conditions:

  • Laid in an unheated loft space. Side connected (Dantherm HCH).
  • Hanging over e.g. a suspended ceiling (Dantherm HCC 2).
  • In a technical cabinet/shaft inside the building envelope (Dantherm HCV or HCC 2).
  • On the basement wall (all units fit).
  • In a standard 60 cm cupboard in the entrance (Dantherm HCV).


Get our full 32-page guide for selection and installation of residential ventilation right here: Selection Guide for residential ventilation

Need versatile units that work for both right and left setups?

In apartment buildings, the neighbouring apartments are often mirror images of each other in terms of layout. This requires ventilation systems that are easily adaptable for both scenarios.

Dantherm's HCV 300, 400, 500, 700 and HCC 2 all have an integrated setting function that enables the systems to be changed electronically from a right to left setup, so that the same type of unit can be used without any problem even when the physical conditions are mirrored.

Central vs. decentral ventilation

In recent years, decentralised ventilation – i.e. one unit per home – has gained ground compared to central ventilation units, where one system is connected to several homes in an apartment building. This is due partly to the Danish fire safety standard DS 428, which places strict demands on fire safety for ventilation systems that connect several apartments (or 'fire cells') through ductwork, which is always the case with central systems.

With decentralised systems that do not share ductwork, there is no requirement for the same kind of fire safety control in the solution. Traditionally, the argument for centralised ventilation has been that the biggest systems cost less and are simpler to service. In actual fact, however, central ventilation is often more expensive, as it requires considerable fire safety control and corresponding fire and smoke dampers and detectors.

Most people choose a decentralised solution because it offers the opportunity for individual adjustment, delivers energy-efficient ventilation and offers greater installation flexibility.

For more information, please download Dantherm’s full Selection Guide for residential ventilation.