Nuaire Drimaster ECO CO₂ Sensor

Site Preparation

Choose a representative location where the sensor can measure the air that people actually breathe. A good position is at typical breathing height in a frequently occupied space such as a living room, hallway or landing.

Avoid placing the sensor in direct sunlight, above radiators, near ovens or hobs, directly opposite trickle vents or openable windows, or in the immediate air path from a supply diffuser, since any of these can distort readings. Do not install the device inside kitchens or bathrooms.

Aim for a clear line of sight to the area you wish to control and avoid mounting directly on large metal surfaces that can reduce wireless signal strength. Confirm that a safe 230V supply can be provided locally by a qualified electrician and that there is room to route the short flying lead or back box feed neatly.

Wipe the wall so the adhesive pad, if used, bonds well, or plan for screw fixings if the surface is textured.

Step-By-Step Installation

1. Make The Area Safe: Ask a qualified electrician to isolate the intended circuit at the consumer unit and verify that the chosen spur or back box is dead before any cabling is handled.
   
   

2. Mark And Fix The Mounting Point: Offer the sensor backplate to the wall at the chosen height. For a smooth, clean substrate you may use the supplied adhesive pad. For a textured or porous surface use the screw fixings. Ensure the backplate is level and that cable entry is aligned.
   
   

3. Provide Power: The electrician should bring a 230V feed to the mounting point in accordance with current wiring regulations and connect line and neutral to the sensor terminals or flying lead as provided. Keep low voltage signalling well away from mains conductors and dress the cable neatly behind the unit.
   
   

4. Fit The Sensor Body: Locate the sensor on its backplate and secure it so the vents are unobstructed. Restore power at the spur or consumer unit and confirm that the sensor powers up as indicated by its status display or LED.
   
   

5. Prepare The PIV Unit For Pairing: Stand at the hallway diffuser of your Hall Control PIV. Use the diffuser buttons to enter accessory pairing mode. The diffuser display will show that it is ready to bind.
   
   

6. Pair The Sensor: Press the pairing or link button on the CO₂ sensor. Wait for the diffuser to confirm a successful link, then exit pairing mode at the diffuser.
   
   

7. Prove Operation: If the sensor has a test function, activate it and confirm that the PIV unit boosts within a short period. If there is no test button, occupy the room normally and observe that the unit will boost when CO₂ rises during busy periods, then return to background speed when levels fall.
   
   

8. Finish Neatly: Tidy cables, fit any screw caps, and note the installation date and location for future reference.

Handover And Everyday Use

Explain to the household that the sensor continuously monitors indoor CO₂ and asks the PIV system to increase airflow when levels rise. Reassure them that this is normal and that the fan will return to its background setting when air quality improves. There is no need for daily adjustments.

Advise users to keep the sensor face free from obstructions such as furniture, curtains or picture frames and to avoid covering or painting the vents. Where a manual boost switch is also fitted, clarify that the switch provides a temporary override while the CO₂ sensor works automatically in the background.

Maintenance And Aftercare

The sensor requires very little attention. Lightly dust the grille with a soft brush or a vacuum on a low setting during routine cleaning. Do not spray cleaning fluids into the vents. During periodic electrical checks, confirm that the device powers up correctly and still communicates with the PIV unit.

If the home layout changes, or if large items are placed in front of the device, consider relocating it to maintain representative readings. Record the location and pairing so it can be re-established easily after any works.

Troubleshooting

If the PIV unit does not boost during busy periods, first confirm that the sensor has power. Check the local spur or breaker and any neon indicator. Next, re-pair the sensor by entering pairing mode at the diffuser and pressing the sensor’s link button again.

If response remains inconsistent, review placement. Move the sensor away from direct sunlight, heaters, windows that are frequently opened, or any obvious sources of airflow that could dilute local readings.

If wireless range appears marginal, reposition the sensor to improve the signal path and avoid mounting on large metal surfaces.

If the unit boosts too often, the sensor may be too close to a frequently occupied desk or sofa. Moving it slightly can provide a more representative average of room air.

If none of these checks restores correct behaviour, consult your electrician or supplier for further guidance.

Q) What is the Nuaire Drimaster ECO CO2 Sensor and what does it do in a Hall Control PIV system?

A) The Nuaire Drimaster ECO CO2 Sensor, model DRI-ECO-CO2, is a wall-mounted, mains-powered accessory that monitors indoor carbon dioxide and wirelessly instructs a compatible Drimaster ECO Hall Control unit to increase airflow when levels rise. By tracking CO₂ in parts per million, it acts as an occupancy proxy, so your Positive Input Ventilation automatically provides extra dilution when rooms are busy, stuffy or being used for activities such as cooking, studying or entertaining. Once CO₂ falls back below the trigger point, the Drimaster returns to its commissioned background speed without any manual intervention. The result is cleaner, fresher air day to day, while the core aims of PIV remain intact: steady moisture dilution to reduce condensation risk and black mould, with low energy use and minimal noise. Because the Nuaire Drimaster ECO CO2 Sensor communicates by radio, it adds this demand-led behaviour without running new control cables between floors.

Q) Which units work with the Nuaire Drimaster ECO CO2 Sensor and how does it connect?

A) The Nuaire Drimaster ECO CO2 Sensor is explicitly compatible with Drimaster ECO-LINK-HC and Drimaster ECO-HEAT-HC. These are the Hall Control variants with the user interface on the ceiling diffuser. Pairing is carried out at the hallway diffuser using the built-in RF function, so the sensor talks wirelessly to the loft-mounted fan. This keeps retrofits neat and avoids chasing walls for control wiring. The sensor is powered locally at 230 V for stable, battery-free operation; only the control signal is wireless. It can be used alongside other approved Hall Control accessories, such as the 2-Way or 4-Way Boost Switch and the RH Sensor, with each device bound at the diffuser in turn. If you have a different Drimaster model without Hall Control and RF capability, the Nuaire Drimaster ECO CO2 Sensor will not pair, so you should confirm model compatibility before purchase or consult your supplier for the correct accessory.

Q) How does the Nuaire Drimaster ECO CO2 Sensor decide when to boost and how does that help air quality?

A) The Nuaire Drimaster ECO CO2 Sensor continuously samples room air and compares measured CO₂ against a preset trigger threshold. When readings rise above that level, the sensor transmits a secure RF command to the paired Drimaster ECO unit, requesting a temporary increase in airflow. This occupancy-responsive boost rapidly dilutes exhaled bio-effluents and odours while the background PIV flow continues to control moisture. Because the boost is demand-led, ventilation rises when it is genuinely useful, for example during busy evenings or home office sessions, and falls back automatically once CO₂ reduces. This targeted approach improves comfort and perceived freshness without heavy energy penalties or constant high speeds. It also complements other control modes: the Drimaster’s loft-temperature logic still harvests free warmth or pauses in very hot lofts, and any fitted humidity accessory can trigger its own response. Together, these functions make the system adaptive to both occupancy and environmental conditions.

Q) Where should I install the Nuaire Drimaster ECO CO2 Sensor and what siting rules should I follow?

A) Mount the Nuaire Drimaster ECO CO2 Sensor at typical breathing height in a frequently occupied space such as a living room, hallway or landing where it will measure representative room air. Avoid direct sunlight, radiators, fireplaces, ovens and hobs, which can distort readings, and do not place it directly opposite open windows, trickle vents or extract fans where outdoor air can skew the result. Keep it out of bathrooms and kitchens, which have transient spikes and moisture that do not represent whole-home conditions. Do not hide the sensor behind curtains, furniture or pictures, and avoid mounting on large metal surfaces that can reduce wireless signal strength. The unit is mains powered at 230 V, so a qualified electrician should provide a safe local supply. The backplate can be fixed with screws, or the supplied adhesive pad can be used on smooth, clean substrates for a neat finish.

Q) How do I pair the Nuaire Drimaster ECO CO2 Sensor with my Hall Control Drimaster and test it?

A) With power safely provided to the sensor, stand at the Hall Control diffuser of your Drimaster ECO-LINK-HC or ECO-HEAT-HC and enter accessory pairing mode using the diffuser buttons. The display will indicate readiness. Press the pairing or link button on the Nuaire Drimaster ECO CO2 Sensor and wait for the diffuser to confirm a successful bind. Exit pairing mode and prove operation. If the sensor offers a test function, activate it and check that the Drimaster boosts within a short period. If not, occupy the room normally and observe that airflow rises during busy periods and returns to the background setting as CO₂ falls. If pairing fails, repeat the process closer to the diffuser, replace the accessory’s fuse if fitted, and ensure there is a clear signal path. Keep a note of the installation location and pairing date for future reference and re-commissioning.

Q) What advantages does the Nuaire Drimaster ECO CO2 Sensor offer compared with manual boost only?

A) The Nuaire Drimaster ECO CO2 Sensor brings automatic, demand-led control that responds to the air people actually breathe, rather than relying on occupants to remember a switch. Because CO₂ tracks occupancy and activity, boosts occur precisely when rooms are in use and stuffiness is most likely, then taper off when the space quietens. This keeps energy use modest while maintaining comfort and air quality, and it avoids over-ventilating unoccupied rooms. The sensor integrates neatly with the Hall Control diffuser by radio, preserving finishes and avoiding disruptive cabling. It coexists with a manual boost switch, so users can still trigger a short burst during events such as showering or indoor clothes drying. For landlords and portfolio managers, the Nuaire Drimaster ECO CO2 Sensor supports consistent outcomes across dwellings by automating sensible behaviour and reducing dependence on daily tenant interaction with controls.

Q) What practical tips help me get the best from the Nuaire Drimaster ECO CO2 Sensor in day-to-day use?

A) For the Nuaire Drimaster ECO CO2 Sensor to perform well, place it where it sees representative room air and keep the vents clear of dust. If you frequently open windows in the same room, consider siting the sensor in an adjacent living space to avoid false lows. In homes with both CO2 and humidity accessories, distribute them so each measures the condition you care about most, for example CO2 in the living area and RH near bedrooms or the landing. Leave internal doors ajar where practical to help the boosted airflow mix through the dwelling, and continue using kitchen and bathroom extracts to remove moisture at source. During handover, show occupants how boosts feel at the diffuser so they recognise normal operation. Finally, review placement if occupancy patterns change significantly, for example after a home office is set up in a different room.

Q) What maintenance does the Nuaire Drimaster ECO CO2 Sensor need and how long will it last?

A) The Nuaire Drimaster ECO CO2 Sensor is mains powered, so there are no batteries to replace. Routine care is limited to light dusting of the grille with a soft brush or a vacuum on a low setting during housekeeping, and a quick function check during periodic electrical visits. Do not spray cleaning fluids into the vents. Because it is a solid-state electronic accessory, there is no consumable element in normal service, and typical lifespan aligns with the service life of the associated PIV installation. If building works create heavy dust, protect the device temporarily and verify correct operation afterwards. Should the layout of the home change, for example by placing large furniture in front of the sensor, relocate it to maintain a clear sample of room air and re-pair it at the diffuser if required.

Q) What are the limitations of the Nuaire Drimaster ECO CO2 Sensor and when might it not be suitable?

A) The Nuaire Drimaster ECO CO2 Sensor is a comfort and air-quality accessory rather than a safety device. It does not detect carbon monoxide, smoke or gas leaks and must not be used as an alarm. It is designed only for RF-enabled Hall Control models, specifically Drimaster ECO-LINK-HC and ECO-HEAT-HC, and will not pair with non-HC units. Placement near strong draughts, direct sun or heat sources can skew readings and lead to unnecessary or insufficient boosts, so siting guidance should be followed. Wireless range in very large or metal-framed buildings may require more considered positioning to ensure a robust signal path. The sensor cannot correct issues caused by blocked supply diffusers, clogged PIV filters or poor ventilation habits, so basic system maintenance and good practice still apply for reliable condensation control and indoor air quality.

Q) How do I troubleshoot if my Nuaire Drimaster ECO CO2 Sensor does not appear to trigger boosts reliably?

A) Start by confirming that the Nuaire Drimaster ECO CO2 Sensor has power at its local spur or breaker. Next, re-enter pairing mode at the Hall Control diffuser and re-press the sensor’s link button to re-bind. If responses remain inconsistent, review placement and move the sensor away from direct sun, radiators, openable windows or extract paths that can dilute readings. Avoid mounting on large metal surfaces and try a location with a clearer signal path to the diffuser. If boosts are too frequent, the sensor may be too close to a constantly occupied seat; shifting it slightly can yield a more representative average. Finally, check that the PIV unit itself is operating normally at background speed and that its filters and duct are clear, as poor base airflow can mask the effect of demand boosts. If issues persist, consult your electrician or supplier for further guidance.

Drimaster ECO-CO2 Installation & Maintenance

Nuaire Residential Catalogue