Nuaire Drimaster ECO Relative Humidity Sensor

Site Preparation

Choose a representative location where the sensor will sample the air people actually breathe, such as a living room, hallway or landing. Aim for typical breathing height so readings reflect the occupied zone.

Avoid placing the sensor in kitchens or bathrooms, in direct sunlight, above radiators, near ovens or hobs, directly opposite trickle vents or frequently opened windows, or in the immediate path of supply air from a diffuser.

Try not to mount it directly on large metal surfaces that can reduce wireless signal strength. Check that the wall surface is clean and sound. Decide whether to use the supplied adhesive pad for smooth, non-porous surfaces or screws for textured or porous substrates.

Have fresh AA batteries ready and make sure there is safe access to the Drimaster Hall Control diffuser for pairing once the sensor is mounted.

Step-By-Step Installation

1. Prepare The Sensor: Open the housing carefully, insert the AA batteries observing polarity, and refit the cover. Confirm the status light or display shows the sensor is powered.
   
   

2. Mark The Position: Offer the backplate to the wall at the chosen height. Use a spirit level to ensure it is straight and lightly mark the fixing points.
   
   

3. Fix The Backplate: On a smooth surface, wipe the wall, apply the adhesive pad to the backplate and press firmly for a secure bond. On textured or porous surfaces, drill and plug the fixing points and secure the backplate with appropriate screws.
   
   

4. Mount The Sensor Body: Engage the sensor on the backplate so it sits flush and the ventilation slots are unobstructed. Give a gentle pull to confirm it is firmly retained.
   
   

5. Prepare The Drimaster For Pairing: Stand at the Hall Control diffuser and use the diffuser buttons to enter accessory pairing mode so the unit is ready to bind with a new device.
   
   

6. Pair The Sensor: Press the sensor’s pairing or link button. Wait for the diffuser to confirm a successful link, then exit pairing mode at the diffuser.
   
   

7. Set The Humidity Trigger: Use the sensor’s controls to choose a sensible relative humidity set point for your home. Many properties perform well with a mid-range trigger that prevents moisture build-up while avoiding unnecessary boosting. You can fine-tune seasonally if required.
   
   

8. Prove The Response: If the sensor has a test function, activate it and confirm that the Drimaster boosts. If not, create a gentle local humidity increase, for example by placing a mug of hot water nearby for a short time, and check that the unit boosts, then returns to background speed as conditions stabilise.
   
   

9. Finish Neatly: Tidy the area, record the installation date and location for future reference, and ensure the sensor face remains clear of furnishings and curtains.

Handover And Everyday Use

Explain to the household that the sensor continuously monitors indoor relative humidity and automatically asks the Drimaster to increase airflow when moisture rises above the chosen set point. No daily adjustment is required.

Encourage users to keep the sensor face clear and not to paint over or cover the ventilation slots. If humidity frequently rises during certain activities, such as drying laundry indoors, the system will respond automatically and then return to background ventilation when conditions improve.

Maintenance And Aftercare

Routine care is minimal. Lightly dust the grille during normal cleaning with a soft brush or vacuum on a low setting. Do not spray liquids into the sensor. Replace the AA batteries when the low-battery indicator appears or if the device stops responding.

Battery changes do not normally require re-pairing, but if the link is lost simply repeat the pairing steps at the diffuser. If the layout of the home changes, or if large furniture is placed in front of the device, consider relocating the sensor so it continues to sample representative room air. A quick functional check every few months helps confirm reliable operation.

Troubleshooting

If the Drimaster does not boost when you expect, first check the sensor power by confirming the status light or display is active, then replace the batteries if necessary. Re-enter pairing mode at the diffuser and press the sensor link button to re-establish the connection. Review the siting to ensure the device is not in direct sunlight, above a heater, in a constant draught from a window, or in the immediate supply airstream from the diffuser, as any of these can distort readings.

If boosting seems too frequent, raise the humidity set point slightly or move the sensor away from short-lived moisture spikes.

If boosting rarely occurs despite obvious moisture, lower the set point a little or relocate the sensor to a more representative position. Where wireless range appears marginal, move the sensor to improve the signal path and avoid mounting directly on large metal surfaces.

If issues persist after these checks, repeat the pairing procedure and perform a simple response test as described above.

Q) What is the Nuaire Drimaster ECO Relative Humidity Sensor and what does it do?

A) The Nuaire Drimaster ECO Relative Humidity Sensor (DRI-ECO-RH) is a compact, wall-mounted accessory that continuously measures indoor relative humidity and wirelessly instructs a compatible Drimaster ECO Hall Control PIV unit to increase airflow whenever moisture rises above a chosen set point. By adding this automatic, demand-led response to the steady background supply provided by Positive Input Ventilation, the sensor helps the dwelling shed excess moisture generated by bathing, cooking and everyday occupancy before it can condense on cold surfaces. That proactive boost supports the prevention of black mould, reduces musty odours and helps stabilise indoor conditions, while the fan automatically returns to its commissioned background speed once humidity falls. Because the device communicates by radio with the hallway diffuser, you gain intelligent control without running additional cables between floors, making the upgrade neat, quick and well suited to occupied homes and refurbishments where disruption must be kept low.

Q) Which Drimaster models work with the Nuaire Drimaster ECO Relative Humidity Sensor and how does pairing happen?

A) The DRI-ECO-RH is purpose-designed for Nuaire’s Hall Control range and is explicitly confirmed as compatible with Drimaster ECO-LINK-HC and Drimaster ECO-HEAT-HC. Commissioning is carried out at the hallway diffuser rather than in the loft: place the fan into accessory pairing (binding) mode using the diffuser buttons, press the sensor’s link button, wait for the confirmation on the diffuser display, then exit pairing mode. From that point the sensor will command a temporary boost whenever indoor RH exceeds the set threshold, and the PIV will revert to its background speed as levels fall. The sensor is battery powered, so only the control signal is wireless; no mains spur or control wiring is required at the mounting point. If your home uses a Drimaster model without Hall Control and RF capability, this sensor will not bind, so confirm the exact unit type before purchase or speak with your supplier about the correct accessory for your installation.

Q) Where should I install the Nuaire Drimaster ECO Relative Humidity Sensor for accurate readings?

A) Choose a representative location at typical breathing height in a frequently occupied space, such as a living room, hallway or landing, so the sensor samples air that reflects whole-home conditions. Avoid placing it in kitchens or bathrooms, where short-lived spikes and steam do not represent general humidity; keep it out of direct sunlight and away from heaters, fireplaces, ovens and hobs, which can distort readings. Do not mount it directly opposite openable windows, trickle vents or extract fans, and avoid the immediate supply airstream from the PIV diffuser. For reliable radio performance, try not to install the unit directly on large metal surfaces and aim for a clear signal path back to the hallway diffuser. The backplate can be fixed with screws on textured substrates or with the supplied adhesive pad on smooth surfaces. Ensure the ventilation slots remain visible and unobstructed by furniture, curtains or decorative covers after installation.

Q) How do I set the humidity trigger point on the Nuaire Drimaster ECO Relative Humidity Sensor and what level is sensible?

A) After pairing, use the sensor’s controls to choose the relative humidity percentage at which you want the PIV to boost. A mid-range setting typically suits most UK homes, providing responsive moisture control without unnecessary fan activity; you can fine-tune seasonally as outside conditions change. If you regularly dry laundry indoors or have heavy evening use, a slightly lower set point can help the system respond earlier; if boosting feels too frequent during settled weather, nudge the threshold upward a few points. The aim is to prevent persistent high humidity that leads to condensation on cold bridges and window reveals, while still allowing short-lived spikes to dissipate naturally. Once the chosen threshold is exceeded, the sensor wirelessly requests a boost; when RH falls back below the set point, the PIV returns to its background ventilation rate automatically, so there is no day-to-day adjustment required from occupants.

Q) How does the Nuaire Drimaster ECO Relative Humidity Sensor help with condensation and black mould in practice?

A) Condensation forms when warm, moist air meets cooler surfaces such as external walls, lintels or window reveals. The DRI-ECO-RH monitors indoor RH and triggers a temporary increase in supply airflow as humidity rises, adding timely dilution to the steady Positive Input Ventilation stream. This extra airflow reduces the moisture content of indoor air before it reaches dew point at vulnerable surfaces, which in turn helps prevent the damp patches that encourage black mould growth and musty odours. Because the boost is automatic and proportional to conditions in the home, it tends to activate during showers, cooking or busy occupancy, and then steps back once moisture disperses. The result is calmer humidity swings, drier surfaces and less damage to décor and building fabric. For best outcomes, pair the sensor with good habits—use bathroom and kitchen extracts, keep trickle vents open, and heat the dwelling steadily in colder weather.

Q) Is the Nuaire Drimaster ECO Relative Humidity Sensor easy to install and can I do it myself?

A) The accessory is designed for straightforward retrofit. As a battery-powered, wireless device it requires no mains spur, and pairing is carried out at the Hall Control diffuser without loft access once the sensor is mounted. Most competent homeowners can fix the backplate, insert the batteries, mount the unit and complete the pairing steps with the diffuser. Use the adhesive pad for smooth, non-porous walls or screws with appropriate plugs on textured substrates. The only tools you typically need are a spirit level, pencil, drill (if using screws) and a small screwdriver. After binding, set a sensible RH trigger, run a quick functional check (using the test feature or a gentle humidity rise), and note the installation date. If you are unsure about siting, have unusual wall constructions, or are integrating multiple RF accessories, your installer or electrician can position and pair everything during the main PIV commissioning visit.

Q) What ongoing maintenance and battery care does the Nuaire Drimaster ECO Relative Humidity Sensor require?

A) Day-to-day maintenance is minimal. Lightly dust the ventilation slots with a soft brush or a vacuum on a low setting during routine cleaning; do not spray liquids or solvents into the grille. The unit typically runs on two AA batteries that provide long service life; replace them when the low-battery indicator appears or if the device stops responding. Battery changes do not usually require re-pairing, but if the link is lost you can simply repeat the quick pairing steps at the diffuser. During periodic checks, confirm that the sensor is still firmly mounted, unobstructed and reading room air rather than draughts or direct heat. If redecoration or a change of furniture blocks the sampling path, relocate the unit to a more representative position and verify operation. Keeping the PIV’s own filters clean and the diffuser clear will also ensure the boosted airflow is effective when the sensor calls for it.

Q) Can the Nuaire Drimaster ECO Relative Humidity Sensor be used alongside other Hall Control accessories?

A) Yes. The DRI-ECO-RH is part of Nuaire’s Hall Control ecosystem and is designed to complement other RF accessories. It can operate alongside a CO₂ Sensor that boosts on air-quality grounds and a wireless wall switch that provides manual boost on demand, as well as the comfort-heater control where fitted on ECO-HEAT-HC. Each accessory is paired at the diffuser in turn, with the PIV responding to whichever demand is active, then returning to the background setting when conditions improve. This layered approach allows the system to react intelligently to different triggers—moisture, occupancy and user preference—without conflict or extra cabling. For reliable wireless performance, space the devices sensibly, avoid mounting them on large metal surfaces, and keep a brief record of what has been paired in case you redecorate or move accessories later. After commissioning, demonstrate how each trigger behaves so occupants know what to expect.

Q) What are the limitations of the Nuaire Drimaster ECO Relative Humidity Sensor and when might it not be suitable?

A) The sensor is an air-quality accessory, not a safety device; it does not detect smoke, carbon monoxide or gas leaks and should not be used for alarm functions. It is intended for general living areas, hallways and landings, not for direct installation in kitchens or bathrooms where steam and rapid spikes can cause nuisance boosts. Accurate sensing depends on good siting: strong sunlight, heaters, open windows or direct supply airflow can distort readings, so follow placement guidance. Wireless range is robust in typical homes, but very large properties or heavily shielded constructions may require more careful positioning to maintain a clear signal path to the diffuser. Finally, the sensor complements but does not replace good practice: you should still use local extracts during moisture-producing activities, keep trickle vents open and maintain the PIV filters so the system can deliver the airflow it is asked to provide.

Q) How do I troubleshoot if the Nuaire Drimaster ECO Relative Humidity Sensor is not boosting as expected?

A) Start with power and pairing: check the sensor’s status light or display, replace the AA batteries if they are low, and re-enter pairing mode at the Hall Control diffuser to re-bind the device if necessary. Review siting next—move the unit away from direct sun, radiators, fireplaces, open windows or the immediate supply airstream, as these can suppress or exaggerate readings. If boosting is too frequent, raise the RH trigger slightly or relocate the sensor so it samples a more representative zone rather than a short-lived moisture source. If boosting rarely occurs despite obvious humidity, lower the set point a little and confirm the PIV is operating normally at background speed with a clear diffuser and clean filters. For intermittent wireless response, avoid mounting directly on large metal surfaces and try a position with a clearer signal path to the diffuser. After adjustments, perform a simple response test to verify reliable operation.

Drimaster ECO-RH Installation & Maintenance

Nuaire Residential Catalogue