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Fresh air in
A small, quiet unit fitted in your loft (or on a wall or cupboard in flats) draws in fresh, filtered air.
Positive Input Ventilation specialists
Get Your Free PIV Guide Price — Fix Condensation & Mould at the Source
See what a quiet, low-energy Positive Input Ventilation system costs for a home like yours — then book your free, no-obligation survey. The price we quote is the price you pay.
NAPIT-accredited & fully insured installers
Up to 7-year parts & maintenance plan
Full EIC certificate on every installation
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Free & no obligation
Get your free price guide
Tell us a little about your home and we’ll show you the guide price that may fit.
You’re not imagining it
Sound familiar?
Bleach and dehumidifiers can help for a while. But if poor ventilation is the cause, the problem keeps coming back.
Streaming windows every morning
Black mould returning after bleaching
Musty smells and damp-feeling rooms
These are signs of poor ventilation — and PIV is designed to fix exactly that.
A simple, low-energy solution
How PIV works
Fresh, filtered air gently moves through your home, helping condensation struggle to form.
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Gently spread through your home
The air is delivered through a discreet ceiling diffuser, usually on the landing.
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Moist air pushed out
Stale, moisture-laden air is gently pushed out of the home, so condensation struggles to form.
Runs on as little as 5 watts and typically below 20 dBA — you'll barely know it's there.
Practical help, no hard sell
Why homeowners choose Energy Opti Save
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Free, no-obligation home survey focused on the root cause.
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Free property assessment — a PIV specialist will visit and assess whether your home would benefit from PIV.
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Most installations completed in a single visit, usually 2–4 hours.
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NAPIT-accredited, insured installers with a full EIC certificate.
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Up to 7-year parts and maintenance plan, plus ongoing aftercare.
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Genuine Nuaire Drimaster and Flatmaster units, fitted nationally.
Start with the right information
Find your guide price before you book.
Understand your options first, then decide whether a free survey is right for your home.