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How Much Does a PIV Unit Cost to Install in the UK?
If you're looking into a PIV unit to help with condensation or black mould, one of the first questions is usually how much it's going to cost. Fair enough. You want to know what you're paying for, whether there are any extras and whether the system is actually suitable for your home.
At ClearAIR, we keep the pricing straightforward. We specialise in loft-mounted domestic Positive Input Ventilation (PIV) systems and can usually check whether your home is suitable from a few photographs before arranging an installation.
How Much Does a PIV Installation Cost?
Our current supplied and installed prices are £895 for a non-heated Vent-Axia loft-mounted PIV system and £1,045 for a Nuaire Drimaster ECO Heated PIV system. These prices are all in and include supply and standard installation.
There can be additional work in some properties, particularly around the electrical supply or loft boarding. We check that before confirming your quote, so you know what is involved rather than finding out on installation day.
What's Included in the Installation Price?
A standard ClearAIR PIV installation covers the unit, fitting it in a suitable position in the loft, installing the ceiling diffuser, making the appropriate electrical connection and commissioning the system. We also provide the relevant electrical installation certification.
We'll explain how the unit operates and what you need to know about ongoing maintenance. PIV is designed to work quietly in the background, so there shouldn't be much for you to do day to day.
What Can Make a PIV Installation Cost More?
Most installations are fairly straightforward, but not every loft is the same. These are the main things we check before giving you a final price:
- Electrical protection: if your existing arrangement uses a Type AC RCD and the PIV supply needs additional Type A protection, we can install a suitable Type A fused spur for £75. This is a local upgrade for the PIV supply, not a replacement of the RCD in your consumer unit.
- Loft boarding: if boards cover the proposed installation area, some may need cutting or lifting. Any additional charge depends on how much work is involved.
- Access and suitability: the loft hatch, available working space, loft conditions and diffuser position all need checking. If something isn't suitable, we'll tell you rather than push ahead.
We'll normally ask for photographs of the loft hatch, inside the loft and the consumer unit, together with a quick description of where condensation or mould is appearing.
Heated or Non-Heated PIV: Which Should You Choose?
Both options are designed to provide continuous filtered ventilation, helping reduce excess humidity where poor airflow is contributing to condensation. The main difference is comfort during colder weather.
Our Vent-Axia is the lower-cost, non-heated option. The Nuaire Drimaster ECO Heated includes a heater that can temper incoming air when conditions require it. It isn't designed to heat the house, but it can make the incoming airflow more comfortable in winter.
There's a £150 difference between the standard installation prices. We'd talk you through that choice based on the property, your budget and how sensitive you are to cooler incoming air.
What About Electricity Running Costs?
PIV fans are designed to operate continuously using relatively little electricity. A heated unit will use additional electricity when its heater is active, so the actual cost depends on the model, settings, temperature and your tariff.
That's why we wouldn't promise a single annual running cost for every house. We've also covered the difference between PIV, dehumidifiers and heating in our separate winter running-cost article.
Can Every House Have a PIV Unit Installed?
No, and this is worth establishing before you spend anything. Our installations are for suitable domestic properties with a loft. The loft needs appropriate air conditions, access and space, and the property needs suitable routes for air to move through it.
PIV can be a good option where condensation is linked to inadequate ventilation. It won't repair a leaking roof, penetrating damp or a plumbing issue. If the cause of the problem isn't clear, a more detailed ventilation or damp assessment may be the sensible first step.
How ClearAIR Quotes and Books Your Installation
We try to make this as simple as possible. Send us a few details about the property, photos of the loft and consumer unit, and tell us what's been happening with condensation or mould. We review the information and explain which system we recommend and whether any extra work is likely.
Once the quote is agreed, a 20% deposit secures the booking and you can choose from the available installation dates. The installation is usually completed in one visit, with the system commissioned before we leave.
Get a Clear PIV Installation Quote
If condensation keeps coming back or you're fed up with cleaning mould from the same areas, get in touch with ClearAIR. We'll look at the property information and explain whether a loft-mounted PIV unit is likely to help. The we’ll provide you a no obligation, straightforward quote for the right PIV system for your property
Frequently asked questions
For a suitable house with a straightforward loft installation, our standard prices are £895 for the non-heated Vent-Axia and £1,045 for the heated Nuaire. The number of bedrooms isn't the only factor; loft access, layout and electrics also matter.
Yes. The standard ClearAIR prices quoted are an all in charge for the, supply and installation. We'll identify any additional work before confirming the final quote.
Not always. We check the existing electrical arrangement first. Where a Type A fused spur is needed for the PIV supply, the additional charge is £75. This doesn't mean replacing the RCD in the consumer unit.
Yes, when the heater operates it uses additional electricity. The fan itself is low energy, but heater usage depends on temperature conditions and settings.
Often, yes, although boarding may need lifting or cutting around the installation area. Send us a photograph and we'll explain whether extra work is needed.
PIV can help tackle the excessive humidity and condensation that contribute to some mould problems, but it won't remove existing mould or fix leaks and building defects. The cause needs to be understood first.
Not necessarily. We can assess many straightforward enquiries using photographs and property details. If you need a formal investigation and detailed report, our home ventilation assessment is £395, with 50% credited against subsequent remedial work carried out by ClearAIR.
More on Costs
How Much Does a PIV System Cost to Run?
It's sensible to ask about running costs before fitting something that operates in the background all day and is connected to your mains electricity. The answer depends on whether you're looking at the fan alone or a heated PIV system.
Read article