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Vent-Axia PoziDry PIV
PIV unit for vented attics

For controlling condensation particularly in the refurbishment sector, the Vent-Axia Lo-Carbon PoziDry offers a quick and simple solution. A loft mounted positive input fan draws fresh air from a ventilated loft, filters it and pushes it into the dwelling via a ceiling mounted diffuser. Stale air in the property is forced out through window trickle vents and other gaps and cracks in the building fabric.

The Lo-carbon PoziDry features include:BBA Logo

  • 5-year Vent Axia warranty
  • Building Regs compliant
  • BBA certified
  • Integral heating element (optional)
  • Ease of installation
  • Fit and forget operation
  • Manufactured in the UK
  • Very low energy consumption

The Lo-carbon PoziDry will:

  • Improve indoor air quality
  • Resolve condensation issues
  • Significantly reduce dust
  • Reduce Radon gas levels
  • Help allergy and asthma sufferers

Vent-Axia Lo-carbon PoziDryDownload the Lo-carbon PoziDry brochure

Our price: £391.59 each
(£391.59 inc.)
Product details ..
Vent-Axia PoziDry PIV
PIV unit for vented attics


The Lo-Carbon PoziDry can be installed in a loft space and can be suspended from a roof beam or be floor mounted, with a purpose-designed diffuser normally located over the stairwell of a conventional two storey dwelling or in the main hall of a bungalow. The Lo-Carbon PoziDry is set to the appropriate speed at installation based on the size of the dwelling, providing positive pressure input ventilation. Background ventilation openings provide the exhaust points.Please check the installation manual for fitting instructions.


The robust construction of the Lo-Carbon PoziDry features a specially developed Lo-Carbon DC fan/ motor arrangement which runs quietly and delivers incredibly low running costs. The Lo-Carbon PoziDry uses a sensor to monitor the temperature in the loft, automatically adjusting the air volume when necessary. ‘Trickle’ speed is automatically selected when the ambient loft temperature is up to 18°C. ‘Normal’ is automatically selected when the ambient loft temperature is between 18 and 27°C.If the ambient loft temperature exceeds 27°C, the Lo-Carbon PoziDry will automatically switch to standby (no airflow). The standby power consumption is 2W.In the case of the integral 500W heater version, the heater element is automatically activated when necessary and tempers the supply air to 10°C. Can be used for air replacement in conjunction with an extract fan.


The unit includes a filter with up to 5 years maintenance intervals to reduce the number of call outs needed throughout its life span.


As standard. Measures the number of days the product has been switched on to provide precise running information.

Speed Control

With selection of 2 of 6 speeds available up to 50l/s, the unit is suitable for houses up to 360m3.


An optional comfort heater is available for operation when the incoming air temperature becomes low.

Speed Control

With selection of 2 of 6 speeds available up to 50l/s, the unit is suitable for houses up to 360m3.

Typical Specification

The unit should be mounted in the loft space with a diffuser in self-extinguishing ABS positioned at the top of the stairwell. The unit meets the EMC and low voltage directives.


The electronically controlled DC motor is manufactured with long life ball bearings and is fitted with Standard Thermal Overload Protection (S.T.O.P.). Suitable for ambient operating temperatures of -25°C to +40°C. For complete peace of mind, the Vent-Axia Lo-Carbon PoziDry is backed by a 5 year guarantee.

Vent-Axia PoziDry PIV