NEW STOCK EXPECTED W/C 07/07/2025 – Kair Trakmaster 125 Slimline Heat Recovery Ventilation Unit (For single room or dual with short duct runs)

Hi Mark,

Thank you for your question,

The Kair Trakmaster 125 is designed to work best in a horizontal orientation to maintain proper airflow. When installed vertically or flat, the duct may not provide the same level of airflow efficiency, as air may not flow evenly or could create unnecessary pressure drops and not drain the condensation or humid air properly.

Kind regards,

Hi Mark,

Thank you for your question,

The Kair Trakmaster 125 is designed to work best in a horizontal orientation to maintain proper airflow. When installed vertically or flat, the duct may not provide the same level of airflow efficiency, as air may not flow evenly or could create unnecessary pressure drops and not drain the condensation or humid air properly.

Kind regards,

Hi Claire,

Thank you for your question,

The Kair Trakmaster is an extract and supply unit which only does short duct runs up to 3m. And is for single rooms or dual with short ducts runs and is specifically designed for single rooms, small apartments, flats or houses. Please see the image below as the image under "example" is the drain used for this system. 

The Kair Trakmaster 125 Slimline Heat Recovery Ventilation Unit could be a suitable solution for your small 2-bed terrace house, especially for your plan to extract air from the upstairs bathroom and supply fresh air to the main bedroom. Here are the key features that align with your needs:

1. Heat Recovery and Ventilation: The unit recovers heat from the extracted air, reducing energy loss, while providing a balanced fresh air supply to the other room (in your case, the main bedroom)​(Kair-Trakmaster-125-Dat…).

2. Effective Airflow: It has a maximum air capacity of 106 m³/h, which should be sufficient for small spaces like a bathroom and bedroom​(Kair-Trakmaster-125-Dat…).

3. Humidity Control: By extracting moist air from the bathroom and supplying fresh air to the bedroom, it can help in reducing humidity levels and improving overall air quality.

4. Duct Runs: The unit is designed for short duct runs, which makes it suitable for smaller homes like yours where the rooms are closer together​(Kair-Trakmaster-125-Dat…).

Additional Considerations:

• The unit works best with ductwork that doesn't have too many bends or long runs, which could reduce airflow efficiency.
• Ensure that there is a sufficient service access for maintenance like filter replacement and cleaning​(Kair-Trakmaster-125-Dat…).

Conclusion:

This unit could work well for your ventilation and humidity control needs, provided your bathroom and bedroom are close enough for efficient airflow within the limits of short duct runs. It should help manage humidity effectively by extracting moist air and supplying fresh air with heat recovery.

The Kair Trakmaster 125 Slimline Heat Recovery Ventilation Unit could be a suitable solution for your small 2-bed terrace house, especially for your plan to extract air from the upstairs bathroom and supply fresh air to the main bedroom. Here are the key features that align with your needs:

1. Heat Recovery and Ventilation: The unit recovers heat from the extracted air, reducing energy loss, while providing a balanced fresh air supply to the other room (in your case, the main bedroom

2. Effective Airflow: It has a maximum air capacity of 106 m³/h, which should be sufficient for small spaces like a bathroom and bedroom​

3. Humidity Control: By extracting moist air from the bathroom and supplying fresh air to the bedroom, it can help in reducing humidity levels and improving overall air quality.

4. Duct Runs: The unit is designed for short duct runs, which makes it suitable for smaller homes like yours where the rooms are closer together​(Kair-Trakmaster-125-Dat…).

Additional Considerations:

• The unit works best with ductwork that doesn't have too many bends or long runs, which could reduce airflow efficiency.
• Ensure that there is a sufficient service access for maintenance like filter replacement and cleaning​.

Conclusion:

This unit could work well for your ventilation and humidity control needs, provided your bathroom and bedroom are close enough for efficient airflow within the limits of short duct runs. It should help manage humidity effectively by extracting moist air and supplying fresh air with heat recovery.

The Kair Trakmaster 125 Slimline Heat Recovery Ventilation Unit is designed primarily for a 125mm duct system. Using it with a 100mm flexible duct run can lead to several issues:

1. **Airflow Restrictions**: The smaller duct may restrict airflow, reducing the unit’s effectiveness and efficiency in heat recovery.

2. **Increased Static Pressure**: Transitioning from 125mm to 100mm can create higher static pressure, potentially causing strain on the unit and affecting its performance.

3. **Noise Levels**: Air moving through a smaller duct can create more noise, which might be noticeable in your living space.

4. **Performance Imbalance**: The unit might not perform optimally, leading to uneven air distribution and reduced ventilation effectiveness.

If you decide to use 100mm ducts, be mindful of these issues and monitor the system's performance closely. It’s generally best to use the recommended duct size for optimal results.

Thanks - Connor.B

Hi I'm Phil from technical

For a small Victorian cellar like yours, it sounds like the advice was to consider a ventilation or dehumidification system rather than tanking or sump pumps. Here’s a breakdown of your options and how to keep the cellar dry, ideally to 90% or more:

1. Dehumidifier:

• Pros: Dehumidifiers are easy to install, affordable, and can effectively reduce the moisture level in the air.
• Cons: They won’t resolve the source of the dampness, and they require electricity and regular maintenance (emptying water or using a continuous drainage system).
• Consideration: Look for a dehumidifier with high moisture removal rates designed for basements or cellars. Energy-efficient models with continuous drainage options are ideal.

2. Mechanical Ventilation:

• Pros: This involves installing a ventilation system that cycles air through the cellar, reducing humidity by increasing airflow. The vents and the coal chute might provide useful points for airflow if you're not using them.
• Cons: This approach is better suited to dealing with condensation, rather than rising damp or structural water ingress. It might not be enough on its own for significant moisture problems but can help reduce dampness.
• Consideration: Positive pressure ventilation systems, which force fresh air into the space, can help. Alternatively, an extractor fan to improve airflow may work if you already have external vents.

3. Combination of Both:

• Many people with Victorian cellars opt for both a dehumidifier and mechanical ventilation. The ventilation helps prevent the buildup of stagnant, damp air, while the dehumidifier directly pulls excess moisture out.

4. Other Steps:

• Check Drainage: Ensure any water that might enter the space (e.g., through the old coal chute) is adequately diverted. You could also cover the coal chute with a watertight, breathable cover.
• Insulation: Installing proper insulation on walls, particularly breathable membranes, can reduce cold walls, which helps prevent condensation-related damp.
• Monitor for Leaks: Make sure there isn’t any ongoing water ingress from pipes or groundwater.

Conclusion:

If your goal is to reduce humidity and dampness to a manageable level (not fully waterproof), a dehumidifier with mechanical ventilation is a good, low-cost, and practical option for your space. You may not need sump pumps or full tanking if the cellar is mostly sound with some residual dampness. Try this combination first and see if it stabilizes the conditions.

kind regards 

Hello I would not recommend these units as they are best used for a single room, like a bedroom, where the ducting can be kept short (no more than 5 meters).

Kitchens produce a lot of humidity, so I suggest using a good extractor fan, like the Nuaire Cyfan or Greenwood Omnique, which can extract up to 60 litres per second.

Heat recovery systems are not advised for kitchens because cooking grease can clog the ducts.

Use a cooker hood above the stove and an extractor fan to remove moisture. If ventilation is needed in the lounge and there is an exterior wall, a K-HRV150 might be suitable, depending on the room size

Hello I would not recommend these units as they are best used for a single room, like a bedroom, where the ducting can be kept short (no more than 5 meters).

Kitchens produce a lot of humidity, so I suggest using a good extractor fan, like the Nuaire Cyfan or Greenwood Omnique, which can extract up to 60 litres per second.

Heat recovery systems are not advised for kitchens because cooking grease can clog the ducts.

Use a cooker hood above the stove and an extractor fan to remove moisture. If ventilation is needed in the lounge and there is an exterior wall, a K-HRV150 might be suitable, depending on the room size

Hope this helps