PIV Installation Cardiff, South Wales

How Does Positive Input Ventilation Work?

The PIV unit is installed in the loft area, and a distribution diffuser mounted in the ceiling in the room below. The continual supply and slight positive pressure result in the air in the property being continually diluted, displaced and replaced to create a healthier indoor air quality. 

Is Positive Input Ventilation Worth it?

Damp, mould and condensation can be extremely difficult issues to deal with in a home, and Positive Input Ventilation can greatly help to reduce these, outweighing any of the potential drawbacks of this system. While the price of installing a PIV unit is not extortionate, it’s not insignificant, but compared to constant maintenance issues raised by issues such as damp, it’s a small price to pay on balance. 


What are the Advantages of Positive Input Ventilation?

Positive Input Ventilation is a cost-effective solution to a number of problems caused by excessive moisture in the home, including:

  • Condensation on windows
  • Damp and mould

A PIV unit can also help improve indoor air quality, helping to reduce odours, VOCs and pollutants that enter the house. It can also reduce humidity by ensuring a fresh flow of air into the property. 

PIV is clinically proven to help reduce dust mite allergens which can cause asthma and affect allergy sufferers. 


  • What is the cost of the PIV and installation?

    We offer a fixed price supply and install service for £795.00

  • How much does the PIV unit cost to run?

    The fan motor typically consumes about 5 Watts of power. Over a year this would cost as little as £7 or less than 2 pence a day. Its smart software enables it to switch itself between heat mode , fan only mode and standby mode in the summer when it is not required. It also uses lost heat from the property and recycles this wasted energy.

  • Where does the PIV go?

    The PIV unit sits in the loft, either hanging from a joist or attached to joists with adjustable anti vibration feet. It has a circular diffuser that is installed on the landing ceiling (white, around the size of a dinner plate).

  • Does the unit require maintenance?

    The unit is maintenance free for up to 5 years, after which it is advisable to replace filters to ensure maximum efficiency and performance. Replacement filters are available through us or on Amazon.

  • Can you hear the PIV running?

    With noise levels as low as 9dB(A) in the home, the unit is near silent when in operation.

  • Do I need a loft ?

    Yes, for our standard PIV units your home will need a loft.

  • How/When do I pay for the PIV installation?

    There is nothing to pay upfront, you will receive an invoice following the installation with our business account details. We accept payment via bank transfer. You will also receive a link to review our services.

  • Where are the units made?

    We supply and install the Vent-Axia Pozidry Pro heated PIV system, these are made in the UK and are made with 100% recycled materials.

  • What areas do you cover?

    We are based in Cardiff and cover all of South Wales. If you are outside of this area please get in contact as we may be able to help.

  • How long does it take to work?

    Results will be noticeable within 24 hours.

  • What is the warranty period?

    We supply a comprehensive 5 year warranty.

  • Does the £795 installation cost include VAT, are there any hidden costs?

    The total amount you will be invoice is £795.00, this includes everything.

  • Do you do surveys/inspections prior to install?

    No, if you have a loft, with access to the landing/hall way below we can usually install a loft mounted PIV. If for whatever reason we cannot install the unit, you will not be charged.

  • How long does the installation take?

    Typically between 1 and 2 hours for loft mounted units.

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