Nuaire Drimaster and Positive Input Ventilation FAQs

PIV can help reduce condensation by lowering excessive indoor humidity and continually introducing fresh filtered air. Results depend on the property, system setup, moisture levels and use of existing extract ventilation, so complete removal cannot be guaranteed.

PIV does not clean existing mould. Existing growth needs to be treated safely and any underlying defect repaired. PIV may help reduce the humid conditions in which condensation-related mould develops.

PIV may help where the problem is condensation caused by excess indoor humidity. It does not cure structural damp, penetrating damp or moisture from a building defect.

No. Rising damp needs appropriate diagnosis and remedial work. PIV is not a damp-proofing treatment.

No. Roof, plumbing and building-envelope leaks must be located and repaired separately.

Continuous fresh air may help dilute musty or stale odours, but it will not remove the source of a smell such as a leak, drain problem, mould growth or smoke.

Positive ventilation can reduce radon in some properties by diluting indoor radon and slightly changing the pressure balance, but it is not suitable for every radon situation and results must be confirmed by testing. Use official UKradon guidance and obtain specialist advice where radon is a concern.

The airflow is gentle, but incoming air can feel cooler in cold weather. Correct sizing, diffuser position and fan settings matter. A heated model can temper incoming air to reduce the sensation of a cool draught.

No. Its integral heater tempers incoming air near the diffuser. It is not central heating and is not designed to raise the temperature of the whole house.

PIV systems are generally designed to run continuously at a low rate so airflow remains steady. Controls and automatic functions vary by model; we explain the recommended settings for the installed system.

A correctly selected and installed PIV unit is designed for quiet operation. Perceived sound depends on fan speed, installation quality, ducting and the acoustics of the home.

Fan electricity use is generally low, but it varies by model and speed. A heated unit uses additional electricity whenever its heater is active. We can explain the manufacturer’s figures for the recommended system.

Yes. The unit, filter, diffuser and airflow should be checked in line with the manufacturer’s instructions. Keeping the filter and air paths clear helps the system work as intended.

The interval depends on the system, environment and manufacturer’s maintenance schedule. We will confirm the correct inspection and replacement guidance for the unit installed in your home.

Yes. DryHome supplies and professionally installs genuine Nuaire Drimaster PIV systems for suitable homes in Northern Ireland. We recommend the model that fits the property rather than promoting one unit for every situation.

The Drimaster ECO HC and ECO HEAT HCS have a seven-year manufacturer’s warranty, subject to Nuaire’s terms, installation requirements and maintenance conditions. Other models can have different coverage. We confirm the applicable warranty for every recommended system before installation; existing customers can also use the DryHome support page.

Not always. Loft-mounted Drimaster systems need a suitable, ventilated and accessible loft. A wall-mounted Flatmaster-style system may be more appropriate where a usable loft is unavailable.

Often, yes, where the bungalow has a suitable ventilated loft and an appropriate central diffuser position. Suitability still depends on the layout and ventilation routes.

A loft-mounted unit is usually unsuitable for a flat without its own loft. A wall-mounted PIV system may be possible, subject to a site survey, installation route, permissions and the building design.

Yes. PIV does not replace suitable bathroom or kitchen extract ventilation. Those fans remove moisture and pollutants close to where they are produced.

Usually, yes. Trickle vents can form part of the home’s designed background and air-exit routes. Do not block vents without advice specific to the property and its ventilation design.

Time depends on the property, access, electrical work and selected system. Many straightforward loft installations can be completed within a working day, but we confirm the expected duration before booking.

A ceiling or wall opening and an electrical connection are normally required. We plan the route carefully, protect the working area and aim to leave a neat finish, although a small amount of controlled dust is unavoidable.

Many domestic installations do not need planning permission, but external grilles, listed buildings, conservation areas, flats and leasehold properties can need additional consent. Check with the relevant planning authority or property manager when required.

That depends on the work and the building. Northern Ireland requirements are assessed by the relevant council’s Building Control service. See our Northern Ireland ventilation and Building Regulations guide and ask Building Control for a decision on a specific project.

Possibly, but ventilation for a new home must be designed as a complete system and accepted as compliant by Building Control. PIV is not automatically an alternative to the ventilation strategy specified for the building.

Mechanical Extract Ventilation continuously removes stale air from wet rooms such as bathrooms and kitchens. Replacement air enters through planned background ventilators.

Mechanical Ventilation with Heat Recovery is a balanced, ducted system that extracts stale air and supplies fresh air while transferring some heat between the two air streams.

PIV supplies filtered air from one main point and gently displaces stale air. MEV continuously extracts from wet rooms. MVHR provides balanced supply and extract through ductwork with heat recovery. The appropriate system depends on the building design, airtightness and ventilation requirements.

Use the online suitability check or contact us directly. We then review the property, loft access, layout and comfort preferences, using photographs or a site survey where needed, before recommending one of our Nuaire Drimaster or wall-mounted PIV systems.

A routine free home visit is not normally needed for loft-mounted systems. Suitability can usually be discussed using your answers, a short conversation and photographs. Wall-mounted installations require a site survey to confirm the route, requirements and price.

Yes. The suitability check is optional. You can call, email or send us a message and we will talk through the property with you.