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The MB4 achieves its four star efficiency with its multi tube heat exchanger combined with a modulating gas valve which minimises gas usage.

The MB4 is specifically designed to fit in small and compact spaces and offers the choice of Navigator Wall Mounted Controller or Navigator Radio Frequency (RF) Remote Controller. Both are fully programmable for automatic operation and capable of running up to 8 integrated zones.** You can also operate your MB4 heater with the optional Bonaire My Climate® Wi-Fi® control.

Bonaire MB4-20XAi

Capacity 20kW  | Efficiency Rating 4.4 Stars
Duct Connection 350mm (14″)  |  Dimensions 895x475x670
Number of Outlets 7-14  |  Warranty 5-Year Warranty


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Product Brochure  |  Warranty |  Technical Specifications