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The Nuaire Drimaster ECO-HC is a loft-mounted Positive Input Ventilation (PIV) unit with Hall Control that delivers a continuous supply of fresh, filtered air to combat condensation dampness and black mould while improving indoor air quality.
The controls are located on the ceiling diffuser in the hallway, allowing simple set-up, speed selection and temperature mode adjustments from inside the property. An integrated loft-air sensor boosts airflow to harvest free warmth and switches to standby in very hot lofts for comfort and energy efficiency. The diffuser’s controlled air-throw spreads air evenly without draughts, external filters are long-life with a 5-year change reminder, and the unit operates at very low power (typically 1.6–15.3W).
The ECO-HC is BBA Approved and supplied with a 7-year warranty for long-term confidence.
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✔️ Gently introduces filtered loft air to dilute humidity, preventing condensation, black mould growth, and damp odours.
✔️ Hall Control puts settings at the ceiling diffuser for easy landing access and protected tamper-lock adjustments.
✔️ Six airflow options from ten to sixty litres per second suit bungalows through to larger homes.
✔️ Smart temperature logic boosts to harvest free warmth, or pauses during excessive heat, minimising running costs.
✔️ 360° anti-draught diffuser, clip-in air dams, long-life five-year filters, and BBA-approved reliability with seven-year warranty.
Nuaire Drimaster ECO-HC applies the Positive Input Ventilation principle to deliver continuous, gentle ventilation throughout the property. The fan draws loft air through high-efficiency filters and introduces it at ceiling level to create a subtle positive pressure, encouraging moist, stale air to escape via natural leakage paths and existing extracts. By steadily diluting humidity generated by bathing, cooking and occupancy, the system tackles the root cause of surface condensation on cold walls and window reveals, helping to prevent black mould, damp odours and damage to finishes for a drier, fresher home with more stable indoor conditions.
The Hall Control design places all user controls on the underside of the circular ceiling diffuser, so commissioning and any subsequent adjustments can be carried out from the landing rather than in the loft. Six selectable airflow settings from 10 to 60 L/s cover everything from small bungalows to larger detached homes, while a tamper-lock function protects settings where required. Typical electrical consumption ranges from 1.6 to 15.3 W depending on the selected duty, providing effective background ventilation with low running costs.
An onboard temperature sensor manages five operating profiles to maintain comfort and efficiency automatically. The unit runs in normal mode for steady background ventilation, boosts when the loft is warmer than the dwelling to capture free solar warmth, and enters standby in excessive heat to avoid over-ventilation. This intelligent control strategy maintains indoor comfort without day-to-day user intervention.
The modern circular diffuser delivers a 360-degree air-throw pattern that disperses supply air evenly without draughts and blends discreetly with contemporary interiors. Supplied clip-in air dams allow installers to steer airflow away from nearby obstacles or smoke alarms to optimise mixing across the ceiling. Long-life filters mounted on either side of the fan housing have a five-year service interval, with the diffuser display showing a filter change reminder via a C indicator. When replacement is due, a matched Drimaster filter kit can be fitted from the loft in minutes.
Designed for UK housing stock with lofts, the ECO-HC is widely specified in retrofit and refurbishment programmes as a low-disruption route to improved indoor air quality. Optional interfaces enable smoke and carbon monoxide alarm shutdown in multi-storey properties, and the system supports recognised UK ventilation guidance as a low-energy background strategy. A robust seven-year warranty is included, comprising one year parts and labour followed by six years parts only, while BBA approval provides independent assurance of consistent performance.
Proven Condensation Control: Positive Input Ventilation steadily lowers indoor humidity and drives out moist, stale air, helping to cure existing condensation and prevent black mould, protecting décor and building fabric.
Hall Control Convenience: All controls are on the ceiling diffuser, allowing commissioning, speed changes and temperature-mode selection from the hallway without loft access; a lock function prevents unwanted tampering.
Intelligent Temperature Logic: An internal loft-air sensor boosts when the loft is warmer to harvest free heat and switches to standby in very hot lofts, balancing comfort with low running costs automatically.
Low-Energy Operation: Efficient motor design delivers whole-house background ventilation at typically 1.6–15.3W, supporting year-round IAQ improvements with negligible impact on energy bills.
Discreet Diffuser With Controlled Air-Throw: The sleek circular diffuser spreads air evenly across the ceiling, with optional air-dams to direct flow away from obstructions and smoke alarms for draught-free comfort.
External Filters With Five-Year Service Life: Long-life filters on either side of the unit protect the home and the motor; the built-in reminder prompts renewal at 5-year intervals to maintain airflow and efficiency.
BBA Approval And 7-Year Warranty: Independent certification and a 7-year Warranty (1 year Parts & Labour, 6 years Parts) provide assurance of performance, durability and long-term value.
Simple Retrofit Installation: Loft mounting with a single ceiling diffuser and short flexible duct keeps disruption to a minimum and suits occupied homes during refurbishment or upgrades.
Whole-Home Air Quality Improvement: Continuous filtered supply air helps dilute everyday pollutants and odours from cooking, bathing and occupancy, supporting a healthier living environment.
Homes With Loft Spaces Experiencing Condensation: Bungalows and 2-storey houses that suffer from window and wall condensation or black mould benefit from low-energy whole-home background ventilation via PIV.
Owner-Occupied Properties Seeking On-Device Control: Hall-mounted controls make ECO-HC ideal where the householder wants convenient access to speed and temperature options without entering the loft.
Refurbishment And Retrofit Ventilation Upgrades: A quick, low-disruption solution for improving indoor air quality across existing housing stock, with minimal wiring and no complex extract ductwork.
Social Housing And Managed Schemes: Filter-change reminders, tamper-lock and very low maintenance suit portfolio installations focused on curing condensation dampness and improving tenant outcomes.
Properties Requiring Low-Energy Background Ventilation: Where continuous, quiet, filtered airflow is needed to supplement intermittent extracts and trickle vents, ECO-HC provides an efficient whole-home strategy.
Before you begin, confirm safe loft access, stable footing and good lighting. Lay temporary boards where necessary so you are not standing on plasterboard. Wear eye protection and a dust mask when cutting the ceiling opening, and gloves when handling insulation.
Treat hidden services as live until proven otherwise and avoid cutting or fixing in areas where cables, pipes or flues may be present. Keep the unit and duct away from hot flues and do not obstruct fire barriers. Work methodically, keep the area tidy, and avoid working alone in hot weather.
Electrical work must be completed by a qualified electrician via a suitable local isolator.
Choose a central location for the ceiling diffuser, typically on the landing, so the fresh, filtered air can spread evenly throughout the home. From the loft, check there is a clear space between joists for the circular opening and that you can route a short, smooth duct run from the fan to the diffuser without tight bends.
Select a hanging point for the fan where there is free air around the casing, with plenty of clearance around the external filters on each side. Plan where the switched fused spur will be located and agree the cable route with your electrician. Clear insulation back from the chosen positions so you can work cleanly and so nothing will press against the filters later.
This model is for homes with a loft. It supplies filtered air from the loft into the landing below; it is not an extract system and must not be ducted outside or into a closed void. Keep the flexible duct as short and straight as possible and make joints airtight to keep the system quiet and efficient.
Controls for the ECO-HC are on the ceiling diffuser, so you will be able to access speed and temperature options from the hallway once installation is complete. Do not mount the fan on, or bury it in, insulation; hang it freely and keep insulation well clear of the external filters so air can be drawn evenly from the loft.
Make The Area Safe: Switch off power to any circuits you may encounter, confirm there are no services where you will cut, and agree with your electrician how and where the final connection will be made. Do not attempt the wiring yourself.
Mark The Diffuser Position: From the landing, locate the joists with a detector and mark the centre point between them. Drill a small pilot hole to confirm the position from above, then mark the circular cut line in the loft.
Cut The Ceiling Opening: Carefully cut the circular hole on your marked line and clean the edge. Offer the diffuser into place from below so the face sits flush and square with the ceiling, then secure it. Leave a small air gap around the diffuser body; do not pack insulation tightly against it.
Hang The Fan Unit: In the loft, suspend the fan from a convenient roof timber using suitable cord or straps so it hangs level and free of the structure. Position it so the external filters on both sides are completely unobstructed and have free air all around them.
Fit The Flexible Duct: Push the duct fully over the fan outlet spigot and secure it airtight with the supplied tie or clamp. Repeat at the diffuser spigot. Route the duct with gentle curves, avoiding kinks, tight bends and sharp edges, and keep the run as short as practicable.
Provide The Power Point And Connect: Fix the power module or connection point to a nearby timber. Your qualified electrician should install the local isolator, connect the supply and make the final connection to the unit. Ask them to test for safety before energising.
Commission The Airflow: With power restored, set the airflow on the diffuser controls to suit the size of the property. Confirm there is a gentle, even flow of air from the diffuser. The unit will automatically boost when loft air is warmer than the home and will pause in very hot loft conditions. If required, use the diffuser controls to select the temperature profile and, if provided, lock the settings.
Finish Neatly: Check that insulation is not touching the fan or the external filters, seal around the diffuser trim if needed, tidy the loft, and ensure the loft hatch closes well and is draught-sealed.
Once running, the ECO-HC supplies a continuous flow of filtered air to dilute humidity and everyday pollutants. You do not need to adjust it daily; it manages itself according to loft temperature.
For best results, avoid blocking the diffuser, keep internal doors ajar where practical to help circulation, and continue to use kitchen and bathroom extract fans in the normal way.
This unit uses external filters on either side of the fan. Under typical domestic conditions, replace both filters every 5 years to maintain airflow, energy efficiency and effectiveness against condensation.
In dustier homes, near busy roads, with pets or after renovation, inspect sooner and replace if the filters look visibly loaded or airflow seems reduced. Replacing the filters is straightforward: switch off power at the local isolator, ensure safe loft access, remove the retainers, slide off the used filters, wipe the plastic intake stubs with a clean, dry cloth, fit the new Drimaster Replacement Filters fully home, refit the retainers and restore power.
If your diffuser displays a change-filter reminder, reset it after fitting. Do not wash or blow out used filters, as this can damage the media and reduce performance.
If airflow at the diffuser feels weak, first vacuum the diffuser face to remove dust, then check in the loft that the external filters are not clogged or pressed against insulation and that the duct has not kinked or collapsed.
If a musty smell or condensation returns, the usual causes are dirty filters, an obstructed duct or the diffuser being blocked by furnishings; renewing the filters and restoring a clear airflow path typically resolves it.
If the unit seems to pause on very hot days, that can be normal, the temperature control prevents warm loft air from being pushed into the home.
If there is unusual noise, make sure the unit is hanging freely and not touching timbers or insulation, and confirm the duct ties are tight so the duct is not flapping.
If the unit will not run at all, check the loft isolator is on and that the fuse or breaker has not tripped; if power is present but the fan will not start, contact your electrician or our Technical Department.
Leave the settings as commissioned, keep the diffuser clear, and plan to fit Drimaster Replacement Filters every 5 years (or earlier in dusty conditions). Pair the system with sensible ventilation habits: use extract fans during cooking and bathing, leave trickle vents open, and heat the home steadily in colder weather.
These simple practices, together with the ECO-HC, provide reliable control of condensation and a consistent improvement in indoor air quality.
A) The Nuaire Drimaster ECO-HC is a loft mounted Positive Input Ventilation unit that supplies a gentle, continuous flow of filtered air into the dwelling. By introducing clean air at ceiling level, usually on the landing, the unit creates a slight positive pressure inside the home. This steady input encourages moist, stale air to drift out through normal leakage paths and existing extract fans, so humidity and everyday pollutants are diluted throughout the day. The ECO-HC applies this principle with user friendly Hall Control on the diffuser, so airflow and temperature modes can be set from the hallway. An onboard loft air sensor boosts when the loft is warmer than the home to capture free warmth, and enters standby in very hot lofts to protect comfort. The result is a drier, fresher indoor environment that helps prevent condensation and black mould while using very little electricity.
A) Condensation occurs when warm, moisture laden air hits cold surfaces such as external walls and window reveals. The Nuaire Drimaster ECO-HC steadily lowers indoor humidity by diluting it with filtered supply air and by encouraging a gentle through movement from clean areas to leakage points and extracts. Over time this reduces the frequency with which surfaces fall below the dew point, so beads of water on glass and cold corners become less common. Without persistent surface damp, mould spores find it harder to colonise, so black mould staining and musty odours reduce. Because the process is continuous and quiet, it protects building fabric and décor without the stop start pattern of intermittent extract alone. The ECO-HC also improves perceived freshness by flushing cooking and occupancy odours, which adds to day to day comfort across bedrooms, hallways and living rooms.
A) Hall Control means the user interface for commissioning and day to day adjustment is located on the underside of the circular ceiling diffuser, not on the fan body in the loft. With the Nuaire Drimaster ECO-HC you can select one of six airflow settings, choose a temperature profile and apply a tamper lock from the landing without climbing into the loft. This is convenient for homeowners who want simple access to settings and for installers who can complete commissioning quickly in occupied properties. If a property’s needs change, for example after added insulation or a change in occupancy, an authorised person can revise settings in minutes. A lock function helps prevent unwanted tampering once the optimal setting is chosen, which is valuable in managed housing while still keeping controls accessible indoors.
A) The Nuaire Drimaster ECO-HC suits homes with an accessible loft, typically bungalows and two storey houses that suffer from window and wall condensation or general stuffiness. It is a strong choice for retrofit because it requires only a single ceiling diffuser and a short duct run, so disruption is low. The diffuser is usually sited centrally on the landing so the gentle air throw spreads across the ceiling and mixes evenly, then migrates into bedrooms and living spaces through door undercuts or slightly ajar doors. The fan hangs from roof timbers in free air so its external filters can draw loft air evenly. Properties without a suitable loft, or with contaminated loft air that cannot be resolved, will need a different ventilation approach. Within the intended housing stock, the ECO-HC provides a dependable background strategy that complements local extracts.
A) The Nuaire Drimaster ECO-HC continuously monitors loft air temperature using an internal sensor. When the loft is warmer than the home, the control logic boosts the airflow to harvest that free warmth and distribute it gently through the dwelling. This can improve comfort in cooler weather without raising energy demand. If the loft becomes very hot in summer, the unit switches to standby to avoid introducing uncomfortably warm air. When conditions fall back within the selected temperature profile, operation resumes automatically at the chosen airflow. These profiles are selected on the Hall Control panel and require no day to day attention once set. The approach balances comfort and efficiency in all seasons and helps keep running costs low.
A) The Nuaire Drimaster ECO-HC provides six airflow settings covering approximately 10 to 60 litres per second. During commissioning, the installer or householder selects a setting that matches the size and layout of the dwelling so that the supply is gentle and even without creating noticeable draughts. The aim is to stabilise background humidity and air quality rather than deliver a strong jet. Once the baseline is set, the temperature logic trims operation by boosting when the loft is warmer and pausing in very hot lofts. If the property is extended or internal doors are changed, settings can be revisited at the diffuser. A built in lock can protect chosen values from casual adjustment in households where consistency is important.
A) The Nuaire Drimaster ECO-HC is designed for low energy background ventilation. Typical electrical consumption is around 1.6 to 15.3 W depending on the airflow setting and temperature profile. Because the system runs continuously at modest speed, it avoids the peaks and troughs of intermittent ventilation while using very little power. The boost on warmer loft days captures helpful solar gain, and standby in very hot lofts avoids inefficiency. In practical terms, the electricity cost is modest compared with the benefits of reduced damp damage and a healthier indoor environment. Keeping the duct short and straight, ensuring airtight joints and renewing filters on schedule helps maintain low fan effort and quiet, efficient delivery.
A) The Nuaire Drimaster ECO-HC uses a modern circular diffuser with a controlled air throw that spreads supply air across the ceiling at low velocity. This encourages gentle mixing without draughts and allows the supply to be felt as an overall freshness rather than a local breeze. The diffuser ships with clip in air dams so installers can steer air away from nearby obstacles or smoke alarms, which is useful in tight landing layouts. The Hall Control interface is neatly integrated into the diffuser face for easy access to speed and temperature modes. Maintenance is simple, a light vacuum or soft brush over the grille keeps it clear, and the display can show a filter change reminder so servicing can be planned.
A) The Nuaire Drimaster ECO-HC has external filters mounted on either side of the fan housing in the loft. These protect the home and the motor by removing loft dust and debris from the supply air. Under typical domestic conditions the filters have a five year service life, and the diffuser can display a change filter reminder using a C symbol at the appropriate time. In dustier homes, for example near busy roads, with pets or after renovation, an earlier inspection is sensible and replacement may be brought forward if the media is visibly loaded. Replacement is straightforward, isolate power at the loft spur, remove the filter retainers, slide off the used elements, clean the intake stubs, fit the matched Drimaster replacement filters, refit retainers and restore power. Do not wash or blow out the elements, as this can damage the media.
A) Installation of the Nuaire Drimaster ECO-HC is carried out from the loft. The installer selects a central ceiling position for the diffuser, cuts a circular opening between joists and fits the diffuser so it sits flush with the ceiling. The fan unit is hung from a suitable roof timber so it is free of the structure, level and clear of insulation, with unobstructed access to the external filters on both sides. A short, smooth run of flexible duct connects the fan outlet to the diffuser spigot, routed with gentle curves and secured airtight at both ends. A qualified electrician provides a local isolator and makes the fixed wiring connection. Good practice is to keep the duct as short and straight as practicable, to avoid kinks, and to ensure insulation does not press against the unit or the filters so airflow remains even and quiet.
A) Routine care is minimal. Homeowners can keep the diffuser face free of dust with a soft brush or vacuum. The main scheduled task is replacing the two external filters roughly every five years under normal conditions, which is completed from the loft in a few minutes. Power must be isolated at the local spur before opening the unit. The correct replacement filter kit for the Nuaire Drimaster ECO-HC should be used, and the filter reminder on the diffuser can be reset after fitting. Any electrical work or changes to commissioned settings should be done by a competent person. A quick annual visual check to confirm the duct is not kinked and the unit is hanging freely helps maintain airflow and low noise.
A) The Nuaire Drimaster ECO-HC is BBA approved, which provides independent assurance that the product performs as described when installed correctly. The unit is supplied with a seven year warranty, usually structured as one year parts and labour followed by six years parts only. This reflects the robust design and the low stress nature of continuous background operation. To support the warranty, installation must follow the manufacturer’s guidance, electrical connection should be completed by a qualified electrician, and genuine Replacement Filters must be used. Keeping a record of installation details and service dates helps with future support and ensures the system delivers long term value in both owner occupied and managed housing.
A) The Nuaire Drimaster ECO-HC includes optional interfaces that allow it to respond to smoke or carbon monoxide alarms in multi storey properties. When connected in line with the relevant guidance, the PIV can be set to shut down if an alarm is triggered so airflow does not influence smoke movement or alarm behaviour. This interface is optional and is arranged by the installer if a risk assessment or local policy requires it. The diffuser also ships with clip in air dams that can steer the air throw away from nearby detectors, which helps avoid nuisance interactions while preserving good mixing across the ceiling. These features support safe integration of whole house background ventilation into wider building services.
A) The Nuaire Drimaster ECO-HC is a background supply system, so it should be used in partnership with local extracts and sensible heating. Keep kitchen and bathroom extract fans in good order, run them during and after moisture producing activities, and leave door undercuts or trickle vents open so air can move from clean areas to extracts. Heat rooms steadily in cold weather to keep surfaces warmer, which reduces the risk of condensation. The PIV supply will steadily dilute humidity and indoor pollutants across the dwelling while the extracts capture peaks at source. Occupants do not need to adjust the ECO-HC day to day, they simply keep the diffuser clear, leave internal doors slightly ajar where practical and maintain good habits.
A) The Nuaire Drimaster ECO-HC is designed for homes with an accessible loft. It supplies filtered air from that loft into the dwelling below and must not be ducted to the outside or into sealed voids. It is not a point extract device, so kitchens and bathrooms still need their own fans. The unit should not be installed near hot flues or open combustion appliances, and the external filters must have clear air around them. If a property has fabric defects such as active leaks or severe cold bridges, ventilation alone will not cure the problem and building repairs are required. Flats without lofts need an alternative configuration. Within its design envelope, correctly installed and commissioned, the ECO-HC offers reliable, low energy background ventilation.
A) Leave the Hall Control settings as commissioned, keep the circular diffuser clear, and avoid placing furniture or decorations where they block the air path. Keep internal doors slightly ajar where practical so supply air can migrate into rooms. Use kitchen and bathroom extracts during and after cooking or bathing, and leave trickle vents open to support a gentle through movement. Heat the home steadily in colder weather to help surfaces stay above dew point. Plan to replace both external filters about every five years or earlier if the home is dustier than average. These habits allow the Nuaire Drimaster ECO-HC to stabilise humidity and improve air quality with minimal intervention or cost.
A) If airflow at the diffuser feels weak, first clean the diffuser face with a vacuum or soft brush. In the loft, check that the flexible duct has not kinked or collapsed and that ties or clamps at both spigots are tight. Confirm insulation is not touching the fan body or pressing against the external filters, which must draw air freely on both sides. If musty smells or condensation return, inspect filter condition and replace if the media looks heavily loaded. Unusual noise usually indicates the unit is touching a timber or the duct is flapping, so rehang the fan so it is free and secure the duct. On very hot days a pause can be normal due to temperature logic. If the unit will not run, check the local isolator, fuse and consumer unit, then contact your electrician or supplier if power is present but the fan remains inactive.
A) Safe installation of the Nuaire Drimaster ECO-HC begins with secure loft access, adequate lighting and stable footing. Temporary boards should be laid where needed so no one steps on plasterboard. Eye protection and a dust mask are recommended when cutting the ceiling, and gloves are advised when handling insulation. Hidden services should be treated as live until proven otherwise, so do not cut or fix in areas where cables, pipes or flues may be present. Keep the unit and duct away from hot flues, do not obstruct fire barriers, and avoid working alone in hot weather. Electrical work must be carried out by a qualified electrician who will install a switched fused spur, complete the connection and test the system before energising.
A) The Nuaire Drimaster ECO-HC is engineered as a continuous background system that delivers whole house ventilation with very low electrical input. Typical consumption is 1.6 to 15.3 W depending on selected speed and temperature mode, which is far lower than running point extract for extended periods. Six airflow settings cover small to large homes, and five temperature profiles manage boost and standby based on loft conditions. The diffuser provides a controlled air throw for even mixing, with clip in air dams to fine tune local delivery. External long life filters protect the motor and the home and have a five year service interval, with a change reminder on the Hall Control display. BBA approval and a seven year warranty underline performance and durability in UK housing stock.
A) The Nuaire Drimaster ECO-HC is intended to run quietly in the background. By keeping the duct short and straight, securing airtight joints and suspending the fan freely from roof timbers, transmitted noise is kept very low. The circular diffuser spreads air at low velocity across the ceiling, which avoids draught noise in normal use. If unusual sounds occur, for example a hum or flutter, it usually indicates the unit is touching a timber, the duct is kinked or loose, or insulation is obstructing an inlet. Clearing contact points and restoring a smooth airflow path typically resolves the issue. Correct commissioning at an appropriate airflow for the property also supports quiet, unobtrusive operation day and night.
A) In addition to lowering humidity, the Nuaire Drimaster ECO-HC steadily dilutes indoor pollutants and odours that arise from cooking, cleaning products and occupancy. By supplying filtered air into the circulation space and encouraging a gentle through movement, it reduces the concentration of these contaminants in bedrooms and living areas. Filters guard against loft dust entering the home, and the even air throw across the ceiling helps mix supply air without cold spots. Many households report a reduction in stuffiness and a fresher feel throughout the day. The ECO-HC is not a replacement for source control, so it works best when combined with kitchen and bathroom extracts, open trickle vents and sensible housekeeping, which together deliver healthier, drier and more comfortable indoor conditions.
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