BSK Notus MVHR Unit is Now SAP Listed
BSK Notus MVHR Unit is Now SAP Listed
The BSK Notus 350 MVHR unit is now SAP listed, giving designers, developers and self-builders recognised performance data that can be used when the unit is specified within relevant SAP calculations.
Already one of the most flexible MVHR units within the BPC Ventilation range, the Notus combines multi-orientation installation, intelligent controls, an internal humidity sensor and high-efficiency heat recovery within a lightweight EPP construction.
Its new SAP listing adds another important benefit, particularly for new-build projects where the energy performance of the ventilation system forms part of the overall dwelling assessment.
The BSK Notus now has listed SAP performance figures including:
- SAP heat exchange efficiency of up to 86%
- SAP Specific Fan Power from 0.57 W/l/s
These figures are now shown alongside the full specification of the BSK Notus 350 MVHR unit.
What Does SAP Listed Mean for an MVHR Unit?
SAP stands for the Standard Assessment Procedure, which is used to calculate the energy performance of dwellings.
For ventilation products, specialist performance testing can provide the data necessary for the product to be listed within the SAP Product Characteristics Database or Appendix Q database. BRE specifically provides testing for whole-house ventilation systems, including Mechanical Ventilation with Heat Recovery (MVHR), for this purpose.
In practical terms, having recognised product-specific performance data means that the characteristics of the BSK Notus can be accounted for when it is selected within applicable SAP calculations.
This is particularly relevant for:
- New-build homes
- Housing developments
- Self-build projects
- Low-energy homes
- Projects incorporating whole-house MVHR
- Designers and energy assessors specifying ventilation equipment
Why Does MVHR Performance Matter in SAP?
An MVHR system continuously extracts stale, moisture-laden air from areas such as bathrooms, kitchens and utility rooms while supplying fresh filtered air to habitable rooms.
The heat exchanger inside the unit transfers heat from the outgoing extract air to the incoming fresh air, reducing the amount of heat that would otherwise be lost through ventilation.
Within SAP, the performance of an MVHR system takes factors including its heat recovery efficiency and electrical energy use into account. Government documentation confirms that heat recovery efficiency is used when MVHR systems are modelled within SAP.
Designed for Modern New-Build Ventilation
As new homes become increasingly airtight, correctly designed ventilation becomes essential.
Rather than depending on uncontrolled air leakage through gaps in the building fabric, MVHR provides a planned method of supplying fresh air and extracting stale air throughout the property.
The system also recovers heat that would otherwise leave the home with the extracted air.
The addition of SAP-listed performance data makes the BSK Notus an even more relevant option for projects where MVHR performance needs to be considered as part of the dwelling's energy assessment.
Choosing the Right MVHR Unit
Although SAP performance is an important consideration, an MVHR unit shouldn't be selected on a single specification figure.
The unit also needs to provide the required airflow against the resistance created by the complete ductwork system.
Factors including the following should all be considered:
- Property size
- Number and type of rooms
- Required extract and supply rates
- Ductwork layout
- Total system resistance
- Unit location
- Available installation space
- Intake and exhaust positions
- Noise requirements
- Control requirements
An appropriately sized system can deliver the required ventilation rates without unnecessarily operating the MVHR unit towards the upper limits of its capacity.
Planning a BSK Notus MVHR System?
If you're considering the BSK Notus for a new build, extension or other residential ventilation project, BPC Ventilation can help with the system design.
Through our Free MVHR Estimate & Layout Guide, you can send us your property drawings and project details for review.
Our design team can help determine the required airflow rates, suitable MVHR unit, valve positions and proposed ductwork layout for the property.
You can also view the full specification and latest product information for the BSK Notus 350 MVHR unit here.
