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HomeDry Positive Ventilation Systems

HomeDry Positive Ventilation Systems
The HomeDry Positive Ventilation System
HomeDry Positive Ventilation Systems
272.00 + VAT
(326.40 inc VAT)

HomeDry Ventilation Systems

The HomeDry Positive Ventilation System

The HomeDry Positive Input Ventilation unit (or “PIV unit”) uses air displacement to ventilate a whole house or dwelling, improving indoor air quality and stopping or preventing condensation and mould problems from occurring. Perfect for retrofit installation into existing properties, the HomeDry PIV Loft Unit is very easy to install.

A single Positive Ventilation Imput System mounted in the roof space supplies fresh, filtered air into the dwelling via a central hallway or landing. This creates a slight positive air pressure which forces stale, moisture-laden air out via fortuitous air gaps and natural leakage.

The ceiling diffuser has been aerodynamically designed to direct incoming air along the ceiling where it mixes with warm, buoyant air before re-circulating downwards, thereby ensuring a more even thermal gradient between the floor and ceiling increasing comfort levels in the home.


Due to its ease of installation, the HomeDry PIV Loft Unit is designed primarily for properties that benefit from a well-ventilated loft space. reducing Condensation and mould problems.


Energy Saving:  Supply-air taken from the roof space is slightly warmer than outside air so can provide some energy saving compared with a conventional extract system.

Simple and Easy Installation: Requires only a single electrical connection. Does not require ducting through the interior spaces.

Low Running Costs: With its DC fan, the HomeDry PIV Loft Unit is extremely energy efficient, costing from as little as 1pence a day to run.

Minimal Maintenance: Replacement of the HomeDry long-life filter is only required every 5 years (if extremely soiled) otherwise you can hand wash in warm water and hang-dry.

Aerodynamically designed diffuser: The  diffuser  is  designed  to  direct  incoming  air along  the ceiling, thereby mixing with, re-using and re-circulating high level warm air.


A full installation guide is supplied with each system. The ceiling must be as airtight as possible to minimise re-circulation of air from within the dwelling. Roof space must be ventilated from outside, e.g. by eaves vents. In most loft spaces there is enough natural ventilation to accomadate this type of Positive Input Ventilation.


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Download home-dry-piv-data-sheet---final.pdf home-dry-piv-data-sheet---final.pdf


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