Kair Trakmaster 125 Slimline Heat Recovery Ventilation Unit

The Kair Trakmaster 125 is a compact, slimline heat recovery unit designed for single-room or dual-room applications with short duct runs. It provides fresh filtered air, extracts stale air, and recovers heat energy through a cross-flow heat exchanger. Ideal for bathrooms, utility rooms, home offices, and small apartments, the unit is discreetly installed above a ceiling and operates quietly and efficiently with three-speed control.

General Product Information

The KTM125 unit supplies and extracts air through separate ducts, recovering heat in the process. It reduces the need for window ventilation, helping retain energy and maintain better indoor air quality. Its slim casing allows it to be suspended in ceiling voids.

Energy Efficiency

Operating at just 30W on low speed and up to 56W on high, the KTM125 offers high performance with minimal energy use. The cross-flow heat exchanger transfers thermal energy between airflows, helping to lower heating costs.

Health Dividend

By improving ventilation and maintaining balanced airflow, the unit helps reduce condensation, humidity, and pollutant build-up, preventing mould and enhancing indoor air quality.

How It Works

Fresh air is drawn in and passes through a G4 filter and the cross-flow heat exchanger before entering the room.

Stale indoor air is extracted, filtered, and routed through the heat exchanger before being exhausted outside.

The unit runs continuously, exchanging air while transferring heat from the outgoing air to the incoming air.

Control

3 fan speeds: Low, Medium, High

Controlled via external CDP-3/5 rotary switch (included)

Speed selection adjusts airflow and power draw

Freeze protection thermostat turns off supply fan if heat exchanger risks freezing (set at +3°C)

Installation Instructions

Horizontal suspended installation in ceiling voids

Connected to 125mm round ducting

Minimum service clearance of 300mm required on servicing side

Condensate drain connection required (3% slope, U-trap not included)

Vibration-isolating fixings and flexible duct connectors recommended

Product Specifications

Voltage: 230V / 50Hz

Power: 30W (Low) to 56W (High)

Current: 0.18A to 0.34A

Airflow: 57 to 106 m³/h

Noise Level: 24 to 41 dB(A) @ 3m

Weight: 13kg

Duct Size: 125mm

Heat Recovery: 65% to 76%

Heat Exchanger: Cross-flow plastic

Filter: G4 (Replaceable FP-Ultra D105-A)

Product Maintenance

Clean or vacuum filters 3–4 times/year; replace after 2 cleanings

Clean heat exchanger with warm detergent once/year

Inspect fan blades annually; clean with cloth or brush

Ensure condensate drain is clear and U-trap is filled

Clean ducting and grilles every 5 years

Electrical Safety

Class I electrical appliance

Requires 3mm contact separation isolation switch

Must be installed by qualified personnel

Wiring must comply with DIN VDE 0100 and local electrical regulations

Regulations

CE marked

Compliant with:

Low Voltage Directive 2006/95/EC

EMC Directive 2004/108/EC

Building Regulations Part F (Ventilation)

Performance

Speed | Airflow (m³/h) | Power (W) | Noise (dB(A))
——|—————-|———–|—————
Low | 57 | 30 | 24
Medium| 78 | 38 | 32
High | 106 | 56 | 41

Product Dimensions

Length: 595mm

Width: 397mm

Height: 212mm

Service clearance: 300mm

Performance Specifications

Operating temp: -25°C to +50°C

Ambient temp: +1°C to +40°C

Relative humidity: max 80%

IP Rating: Motors: IP44 / Assembled: IP22

WHY SPECIFY Kair™

air offers high-performance ventilation systems built to rigorous quality and safety standards. The Trakmaster 125 combines energy-saving operation, quiet airflow, and a low-profile footprint, making it a smart solution for targeted room ventilation with heat recovery.

Available Accessories

Speed switch: CDP-3/5 (included)

Replacement filters: FP-Ultra D105-A

U-trap and drainage kit (not included)

Flexible ducting and grille accessories