Introducing the Belief Heater: A Direct Replacement for MV Airo

Written By: Artur Ujma

01 Jul 2026

We are excited to introduce the Belief Diesel Air Heater, a direct upgrade for existing installations with the MV Airo heaters that is designed to save Fleet operators and repairers time and money, without compromising on performance or compatibility.

This is not a typical Chinese Diesel Heater. It is tested, certified and safe for vehicles in the UK/EU.
EU Vehicle approvals ECE 10R, 122R and E-Mark E13

Whether you manage a fleet, maintain welfare vehicles, or repair diesel heaters, the Belief range offers improved reliability without costing more. Available in 2 kW and 4 kW models, with both 12 V and 24 V options, it is the ideal choice for anyone looking for a cost effective MV heater replacement.

A Cost Saving for Fleet Operators

Replacing a diesel air heater can be an expensive and unwanted cost, especially for fleet operators and welfare hirers. When a heater reaches the end of its service life or becomes uneconomical to repair, finding an affordable and reliable replacement is essential.

That is exactly why we have introduced the Belief Diesel Air Heater. It offers upgraded components for increased longevity and serves as an affordable direct replacement for MV Airo heaters, helping operators reduce replacement costs without compromising on compatibility or reliability. Whether you are replacing a single heater or maintaining an entire fleet, the Belief range is designed to deliver dependable performance while helping you save money.

An Upgrade from MV Airo Tested by Butler Technik

One of the biggest advantages of the Belief Diesel Air Heater is its compatibility with existing MV Airo installations.

Before launching the Belief range, we carried out our own compatibility testing to ensure everything worked exactly as expected. During our testing, we confirmed seamless direct replacement using the same wiring harness, controller, fuel pump and fittings, with no modifications required.

This straightforward compatibility alongside our belief technical documents for both the 2kw and 4kw heaters, makes replacing an MV Airo heater quick and easy, giving fleet engineers, installers and vehicle owners the confidence that switching to Belief is both practical and cost effective.

Belief from Butler Technik

The Belief Diesel Air Heater offers a practical and cost effective solution for anyone looking to replace an MV Airo heater. The versions of replacement heater launched by Butler Technik specifically include upgraded components; highest quality burner, Kyocera glow pin and a brushless motor. With direct compatibility offering a time saving, the Belief units offer an initial cost saving and upgrades that continue to save you money in the future.

Combined with direct compatibility, these improvements help reduce installation time, lower replacement costs and provide long term value for fleet operators, welfare companies, installers and vehicle owners alike.

Keeping replacement and servicing costs under control does not stop with the heater itself. The Belief Diesel Air Heater is supported by a comprehensive range of readily available spare parts, making future maintenance simple and affordable. Should replacement parts ever be required, our range of genuine Belief spare parts allows you to keep heaters operating efficiently while reducing long term maintenance costs.

The Belief range is available now from Butler Technik. If you are a fleet operator, welfare company, or welfare unit and vehicle repairer looking to reduce replacement costs across your vehicles, get in touch with our team to discuss fleet pricing and find the right heating solution for your requirements.