Introducing the BSK Zephyr Plus: High-Performance Single-Room Heat Recovery Ventilation
Introducing the BSK Zephyr Plus: High-Performance Single-Room Heat Recovery Ventilation
Improving indoor air quality doesn't always require a complete whole-house ventilation system. For renovations, apartments and individual rooms, a compact heat recovery unit can provide effective ventilation without the need for extensive ductwork.
The BSK Zephyr Plus is a high-performance single-room Mechanical Ventilation with Heat Recovery (MVHR) unit designed to deliver continuous fresh air, recover heat and help manage indoor humidity.
With airflow rates of up to 100 m³/h, heat recovery efficiency of up to 90% and intelligent temperature and humidity sensing, the Zephyr Plus provides a practical solution for installers, contractors and ventilation specialists seeking efficient decentralised ventilation.
In this guide, we'll explore how the BSK Zephyr Plus works, its key features and why it could be the right choice for your next ventilation project.
What Is the BSK Zephyr Plus?
The BSK Zephyr Plus is a decentralised, single-room heat recovery ventilation unit designed to improve air circulation while reducing the heat loss associated with traditional extraction.
Unlike centralised MVHR systems, which distribute air through a network of ducts, the Zephyr Plus is installed directly through an external wall.
This makes it particularly suitable for properties where installing a complete ducted ventilation system would be impractical or disruptive.
Its compact design combines a regenerative ceramic heat exchanger, low-energy EC fan technology and integrated temperature and humidity sensors.
The result is a versatile ventilation solution for individual rooms, residential renovations, apartments and light commercial spaces.
Key Features of the BSK Zephyr Plus
The Zephyr Plus combines energy-efficient operation with intelligent ventilation technology.
1. High-Performance Airflow Up to 100 m³/h
With a maximum airflow rate of 100 m³/h, the BSK Zephyr Plus offers ventilation capacity for a range of single-room applications.
The unit provides four operating speeds, allowing airflow to be adjusted according to the requirements of the space.
This flexibility makes it suitable for rooms with different ventilation demands, provided the unit is correctly specified and commissioned.
2. Up to 90% Heat Recovery Efficiency
One of the standout features of the Zephyr Plus is its regenerative ceramic heat exchanger.
During extraction, the ceramic core absorbs heat from outgoing indoor air. When the airflow reverses, incoming outdoor air passes through the core and receives some of that stored thermal energy.
This process can recover up to 90% of heat under specified operating conditions.
By recovering heat that would otherwise be lost through conventional ventilation, the system can help reduce unnecessary ventilation heat loss.
3. Intelligent Temperature and Humidity Sensing
The BSK Zephyr Plus includes integrated digital temperature and humidity sensors.
These provide environmental information for the unit's ventilation controls, supporting its intelligent operation.
For properties experiencing excess moisture or poor indoor air circulation, properly designed continuous ventilation can help manage humidity and reduce the conditions that contribute to condensation.
4. Low-Energy EC Fan Technology
Energy efficiency is an important consideration when selecting ventilation equipment designed for continuous operation.
The Zephyr Plus features an efficient EC fan with power consumption ranging from just 1.1W in Night Mode to 3.9W at its maximum listed speed.
This helps keep the fan's electrical demand low while maintaining controlled ventilation.
5. Quiet Operation for Everyday Comfort
Ventilation equipment installed in bedrooms, living rooms and home offices should provide effective airflow without creating unnecessary disruption.
The Zephyr Plus is designed for low-noise operation, with a published sound pressure level starting from 13.7 dBA at 1 metre in Night Mode.
Sound levels increase at higher fan speeds, so installers should select the operating setting according to the project's airflow and acoustic requirements.
6. No Central Ductwork Required
A major advantage of decentralised MVHR is installation flexibility.
Because the Zephyr Plus is fitted through an external wall, it does not require the extensive duct network associated with centralised whole-house MVHR systems.
This can help reduce installation disruption in completed properties, making it a practical option for retrofit projects.
How Does the BSK Zephyr Plus Work?
The Zephyr Plus operates using an alternating airflow cycle and a regenerative ceramic heat exchanger.
The process involves two main stages.
Stage 1: Extracting stale indoor air
Warm indoor air is extracted through the unit and passes over the ceramic heat exchanger. As the air leaves the building, thermal energy is transferred to the ceramic core.
Stage 2: Supplying fresh outdoor air
The fan reverses direction, drawing fresh outdoor air through the same ceramic core. The stored heat is transferred to the incoming air before it enters the room.
By repeating this process, the unit provides controlled air replacement while recovering heat that would otherwise escape.
Unlike simultaneous supply-and-extract systems, reversible heat recovery units alternate airflow direction, which should be considered when designing the ventilation arrangement.
BSK Zephyr Plus Technical Specifications
| Specification | BSK Zephyr Plus |
|---|---|
| Product code | BSK-ZEPHYR-PLUS |
| Ventilation type | Single-room heat recovery |
| Maximum airflow | 100 m³/h |
| Heat recovery efficiency | Up to 90% |
| Heat exchanger | Regenerative ceramic |
| Fan technology | Low-energy EC |
| Fan speeds | 4, including Night Mode |
| Power consumption | 1.1W–3.9W |
| Sensors | Digital temperature and humidity |
| Filters | 2 × G3 |
| Electrical supply | 230V / 50Hz |
| Lowest listed sound pressure | 13.7 dBA at 1 metre |
These specifications make the Zephyr Plus a strong option for projects requiring targeted heat recovery ventilation with minimal energy consumption.
Where Can the BSK Zephyr Plus Be Installed?
The Zephyr Plus is particularly suited to applications where individual rooms require improved ventilation.
Renovations and Retrofit Projects
Installing a full ducted MVHR system into an existing property can be challenging, particularly where ceilings and walls are already finished.
The through-wall design of the Zephyr Plus provides a more localised solution without requiring ductwork to be routed throughout the building.
Bedrooms and Living Areas
Bedrooms and living rooms benefit from a consistent supply of fresh air.
The Zephyr Plus offers adjustable airflow and low-noise operation, making it suitable for consideration in occupied living spaces.
Apartments and Flats
In apartments with limited space for central ventilation equipment, decentralised heat recovery can offer a practical alternative.
A suitable external wall, electrical connection and compliant ventilation design are required.
Home Offices and Light Commercial Spaces
Indoor air quality is also important in working environments.
The Zephyr Plus can help provide controlled ventilation in appropriately sized home offices and small commercial spaces.
BSK Zephyr Plus vs Traditional Extractor Fans
Traditional extractor fans remove air from a room and discharge it outdoors.
Although effective for local extraction, standard extractor fans do not recover heat from outgoing air.
The BSK Zephyr Plus offers a different approach by alternating extraction and fresh-air supply through a regenerative heat exchanger.
Advantages can include:
- Supply and extract ventilation through one unit
- Heat recovery to reduce ventilation heat loss
- Filtered incoming outdoor air
- Adjustable operating speeds
- Low-energy continuous operation
- No extensive central ductwork
However, a single-room MVHR unit is not automatically a replacement for a dedicated bathroom or kitchen extractor fan. Installers should ensure that the selected ventilation strategy meets the requirements of the property.
For further guidance, see the UK Government's Approved Document F: Ventilation.
What Should Installers Consider Before Choosing the Zephyr Plus?
Before specifying a BSK Zephyr Plus, installers should consider:
- Airflow requirements: Ensure the selected operating speed provides the required ventilation rate.
- External wall suitability: Check wall construction, thickness and installation requirements.
- Electrical connections: Installation must follow the manufacturer's instructions and applicable electrical requirements.
- Unit positioning: Allow sufficient space for maintenance, airflow and access.
- Acoustic requirements: Consider noise levels at the intended operating speed.
- Overall ventilation strategy: Ensure adequate air distribution and extraction throughout the property.
For projects with multiple rooms, additional units or a centralised ventilation system may be required.
Discover the BSK Zephyr Plus at Quiet-Vent
The BSK Zephyr Plus combines powerful single-room airflow, high-efficiency heat recovery and low-energy operation in a compact through-wall ventilation system.
For ventilation installers, merchants and contractors, it offers a practical solution for projects requiring controlled fresh air without the complexity of a centralised duct network.
Whether you're specifying ventilation for a renovation, apartment or individual room, the Zephyr Plus provides a flexible option for improving indoor air quality.
At Quiet-Vent, we support ventilation merchants and trade professionals with reliable products, competitive trade pricing and technical product advice.
Interested in other single-room ventilation solutions? Read our Single-Room MVHR Units: A Practical Guide.
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