Lo-Carbon PoziDry Pro with Heater

  • Anti-Vibration joist mounting legs as standard
  • Fully adjustable between 11 l/s - 49l/s
  • SmartSense™ technology offers simple control and data logging
  • Uses latest Lo-Carbon motor technology for low running costs
  • Ultra-low sound level
  • Ceiling diffuser, flexible duct and G4 filters with F7 upgrade option (PM2.5 filtration)
  • Standard 5 Year warranty
  • IPX2 Rated
  • BBA Approved
Vent-Axia PoziDry Pro - Solves condensation, mould and chemicals with in a property
Vent-Axia Lo-Carbon PoziDry Pro with heater 360° view

Product Overview

Ventilation Type
Positive Input Ventilation (PIV)
Social Housing
Product Range
Lo-Carbon PoziDry Pro
Ducting/Connection Size

BBA approved PoziDry Pro™ is simple to install and commission, yet highly effective at reducing condensation and mould.

The perfect solution for hard to cure mould and condensation issues. Improving indoor air quality and preventing moisture build-up within the home, backed up with our 5 year guarantee.

Tried and tested Smart Sense™ Technology makes installation fast. Ready to install out of the box, with an easy carry handle to lift it though the loft hatch. A hanging kit and adjustable legs and feet are included for full installation options.

PoziDry Pro™ improves indoor air quality and quickly eradicates conditions that lead to mould growth, reducing the risk of health issues in the home. The unit is unobtrusive, near silent running and has low operating costs.

Positive Input Ventilation
Designed to prevent and treat condensation and mould quickly. The BBA approved PoziDry Pro™ is the perfect solution for general refurbishment, as its discreet, easy to install and almost silent running. Lo-Carbon PoziDry Pro™ offers a quick and simple solution. A loft mounted positive input fan draws fresh air from the loft, filters it and gently feeds it into the dwelling via a ceiling mounted diffuser. Clean, fresh filtered air with a lower moisture content dilutes, displaces and replaces, contaminated and moisture laden air.


  • Anti-vibration legs offer flexibility when fitting and guarantee silent running
  • Flexible feet – allow the PoziDry Pro™ to be installed across two joists or along a joist offering simple easy installation
  • Moulded handle – makes carrying PoziDry Pro™ safe and simple. The handle also allows you to change the pitch of the PIV if the hanging kit is used
  • Filters – PoziDry Pro™ is unique in offering F7 filters (available separately) which filter down to PM2.5 which includes harmful diesel particulates
  • Smart efficient heater – the efficient built-in 500W heater is mounted on the unit increasing the temperature of the air entering the habitable areas
  • Smart Sense™ Technology – easy setup and smart data logging capabilities all accessed via the intuitive three button menu.

The Lo-Carbon PoziDry Pro™ is uniquely flexible in its installation methods, high sided anti vibration legs and a hanging kit both come as standard, allowing the PoziDry Pro™ to be installed quickly in any sized loft. The easy carry handle incorporated into the body makes carrying the unit easy and safe; especially useful when lifting the unit through loft hatches. 

The unit is supplied with a purpose designed diffuser to be located over the stairwell of a conventional dwelling, in the main hall of a bungalow, in the landing or hallway. The four point contact easy fit technology allows fast and repeatable ‘drill free’ installation.

Using Smart Sense™ Technology the unit is easily set to the appropriate speed at installation based on the size of the dwelling. Natural leakage points that are present in all dwellings, as well as purpose provided exhaust points enhances the air change. En-suites and utility areas should be serviced by continuous mechanical extract ventilation.

The PoziDry Pro™ can also be set to 'Radon' mode in properties that are affected by high radon gas levels. The unit will run continuously to ensure the constant supply of good indoor air to protect residents from harmful gases.


With a lightweight construction, the Lo-Carbon PoziDry Pro™ features a specially developed Lo-Carbon DC fan/motor arrangement which runs quietly and delivers incredibly low running costs. The Lo-Carbon PoziDry Pro™ uses a sensor to monitor the temperature in the loft, automatically adjusting the air volume when necessary. Additionally, resident comfort can be assured through an option to change the temperature at which the unit increases or decreases airflow. The unit will continuously ventilate silently in the background whilst in ‘Trickle’ mode.

Once the unit automatically senses excess heat being lost into the loft the airflow will increase to ‘Energy Recovery’ mode to recover heat that would otherwise be lost through the roof.

During summer months, should the loft exceed 27°C (adjustable) the unit will enter ‘Stand-by’ mode in order stop the circulation of warm air allowing for a more comfortable living environment. PoziDry Pro™ Heater models automatically turn on the 500W heater to boost air temperature during colder months.

Standard filters supplied with the PoziDry Pro™ are G4 (PM10 filtration) which filter out many every day pollutants such as pollen and dust. Optional F7 filters are available (PM2.5 filtration) removing tobacco smoke, diesel particulates, spores and bacteria.

Data Logger
Smart Sense™ Technology allows the unit to record how long it has been running in each of its speeds. It also measures the number of days the product has been switched on to provide precise running information. Smart Sense™ Technology can also record the duration of heater activity and energy used. 

Speed Control
Smart Sense™ Technology makes speed selection easy. Once the house size is selected based on the number of bedrooms, PoziDry Pro™ automatically selects the correct 'Trickle' and 'Energy Recovery' speeds. The speed can be adjusted manually if needed. The Smart Sense™ interface can also be locked ensuring that settings are not tampered with.


The heater model comes with a 500W heater attached to the unit. Smart Sense™ controls allow the PoziDry Pro™ to be adjusted fully when the heater is activated making it adaptable for all lifestyles.

Air Replacement Grille Set*
For air replacement through doors. This consists of a two-piece telescopic set, which fits unobtrusively on either side of the door panel. The minimum fixing thickness is 30mm. The dimensions are 454 x 90mm.

*Only required if there is not a 10mm undercut on the internal doors.

Mounting Options
PoziDry Pro™ comes as standard with both high sided anti-vibration legs and a hanging kit. The legs are designed to be mounted between standard joist widths between 400-600mm centers. Clip and fit connections allow for easy installation.

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 Pro™ is backed by a 5 year warranty.

Discreet Diffuser*

The discreet circular diffuser is easily installed, fitted and maintained. Easy fix features allows it be installed against uneven ceiling surfaces with no gaps. Its low profile and aesthetically pleasing design has been developed with tenant acceptability in mind. Our Smart Air™ Technology reduces air supply noise while increasing performance. The easy clip blanking plates help to control airflow into the property.

*Please note, the diffuser will always be supplied using white plastic.

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