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Decentralised MVHR

Single-room heat recovery ventilation

Compact, single-room heat recovery ventilation units that deliver fresh, filtered air with heat recovery built in — without whole-house ductwork. Ideal for existing homes, apartments and renovations where a centralised MVHR system isn't practical.

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Aerofresh 30 Compact

Aerofresh 30 Compact

Compact paired heat recovery units for fresh, filtered air without ductwork.

  • Fresh, filtered air with heat recovery and no central ductwork
  • Ideal for bedrooms, living spaces, renovations and apartments
  • Compact through-wall installation with minimal building work
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Zehnder ComfoSpot 50

Zehnder ComfoSpot 50

Discreet single-room heat recovery unit for individual rooms.

  • Fresh, filtered air to a single room without a whole-house system
  • Retains warmth in winter and keeps heat out in summer
  • Perfect for renovations, apartments and hard-to-ventilate rooms
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Zehnder ComfoAir 70

Zehnder ComfoAir 70

Compact heat recovery unit for apartments and small dwellings.

  • Whole-of-dwelling fresh air in a compact unit
  • Ideal for apartments, granny flats and renovations
  • Efficient heat recovery lowers heating and cooling load
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Lunos e2-60

Lunos e2-60

Paired, alternating-flow decentralised heat recovery fans.

  • Balanced fresh-air ventilation with minimal building work
  • Excellent heat recovery from a compact through-wall system
  • Ideal for retrofits, renovations and existing homes
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Where it fits

Where decentralised MVHR works best

Decentralised MVHR is through-wall heat recovery ventilation for individual rooms or small zones. It is most useful when you want continuous filtered fresh air but a whole-home duct network would be difficult, disruptive or unnecessary.

Existing homes

Renovations and retrofits

A practical option for finished homes where ceilings and walls are already closed and running central ductwork would mean major building work. Each unit connects directly through an external wall.

Room by room

Bedrooms, studies and living areas

Useful where a particular room feels stuffy, holds moisture or builds up CO₂ overnight. The system provides controlled ventilation without relying on open windows or uncontrolled draughts.

Compact projects

Apartments, additions and small dwellings

Well suited to apartments, granny flats, extensions and staged upgrades where only a few rooms need treatment or there is limited space for a central unit and distribution ductwork.

Choose decentralised MVHR when…

  • • You are improving an existing or already-finished home
  • • One room or a small group of rooms needs better ventilation
  • • Suitable external walls are available for through-wall units
  • • You want to avoid the disruption of a full duct installation

Consider ducted MVHR when…

  • • You are building new or undertaking a major renovation
  • • You want one coordinated system serving the whole home
  • • Duct routes can be planned before ceilings and walls are closed
  • • Precise whole-home supply and wet-room extraction are priorities

What we check

The right unit depends on more than room size

We check wall construction and depth, required airflow, room use, acoustic expectations, filter access, electrical supply and whether a paired push-pull or continuous balanced unit is the better fit. That design work matters just as much as the product choice.

From a real retrofit

See how a Zehnder ComfoSpot 50 was installed through a solid limestone wall to ventilate an existing Mount Gambier home without central ductwork.

View the Mount Gambier project →

Want the deeper comparison? Read our guides to decentralised MVHR for existing homes and retrofitting MVHR into an existing home.

Explore MVHR design

Ventilating an existing home?

Decentralised MVHR is ideal where running whole-house ducting isn’t practical. Tell us about your room or project and we’ll recommend the right unit and provide a quote.

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