Instant Quote
Best for planning, foundations, budgets and quick kit pricing.
- Instant MVHR or MEV kit estimate.
- Basic airflow calculation based on your property details.
- Automatically builds a material list and price.
- Ideal for early-stage projects.

Product Part Numbers:
The Vent Axia Sentinel Kinetic BH Heat Recovery Unit is the UK's top-selling MVHR unit for homes with a maximum floor area of 150m², offering a combination of easy installation, high-quality construction, and SAP Appendix Q approval. The unit delivers exceptional performance with a 90% heat recovery efficiency and multiple control options to ensure your home is always properly ventilated.
This high-performance unit is ideal for residential properties and comes with a 5-year parts warranty and lifetime technical support, providing complete peace of mind.
Key Benefits:
| Parameter | Specification |
|---|---|
| Airflow Rate Max | 245m³/h |
| Airflow Rate @ 100Pa | 245m³/h |
| Max Dwelling Size | 150m² |
| Specific Fan Power (lowest) | 0.48 |
| Dimensions (W x H x D) | 550 x 550 x 285 mm |
| Weight | 15kg |
| Filtration | 2 x G4 filters (optional 1 x M5) |
| Summer Bypass | Yes |
| Frost Protection | Yes (-20°C) |
| Sound Level @ 3m | 20-45 dB(A) |
| Mounting | Wall or floor |
| Ductwork Connections | Top or side |
| Duct Diameter | 4 x 125mm |
| Condensate Drain | Yes |
| BMS | Yes |
| Fireplace Mode | No |
| Alarm System Integration | Yes |
| Passive House | No |
| ERP Rating | A |
| Warranty | 5 years |
| Country of Manufacture | UK |
| Heat Exchanger | PVC Counterflow |
| Available Room Sensors | Humidity, Timer, PIR |
| SAP Appendix Q | Yes |
Enter a few basic details about the property below and we’ll calculate a suitable Ventilation system with an instant quote.
I can help with room counts, MVHR vs MEV, kit options and understanding your quote before you continue.
Bernie is a guide only. Please check your inputs before creating the quote.
Add the floor area and room counts for the property.
The system checks the required ventilation rate and builds the kit.
You’ll be taken to a full quote page with the kit breakdown and pricing.
Larger homes, complex layouts or systems requiring multiple units may be better suited to a manual layout guide.
For larger or more complex properties, our design team can review your plans and provide a free estimate with the most suitable system and kit configuration.