Im looking to replace a Ardic 432DL diesel heater - The Eberspacher Airtronic M3 D4R 4kw 12v kit looks ideal?

The Ardic has existing 70mm ducting and outlets, the furthest outlet is about 7m from the heater unit.

1. Will this heater be a suitable replacement?

2. Can I get a transition to 70mm duct?

3. Is it in stock

Thanks John

Question

Im looking to replace a Ardic 432DL diesel heater - The Eberspacher Airtronic M3 D4R 4kw 12v kit looks ideal? The Ardic has existing 70mm ducting and outlets, the furthest outlet is about 7m from the heater unit. 1. Will this heater be a suitable replacement? 2. Can I get a transition to 70mm duct? 3. Is it in stock Thanks John

This question is related to Eberspacher Airtronic M3 D4R Marine Heater Kit inc Easy Start Pro 4kw 12v.

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Answers (1)

Answered by Butler Technik's David Butler
Posted 7th April, 2025 at 14:44 by David Butler

The Eberspacher M3 D4R Airtronic heater is designed to function correctly with 75mm internal diameter ducting - is your 70mm dimension ineternal or external ID may I confirm? We would need to ensure we run 75mm ID at least to the first permanently open outlet to ensure heater does not start to lower heat output too early as it senses air temperature over it's heat exchanger, especially as the overall ducting length is 7 mtrs. If more convenient please email sales@butlertechnik.com for direct assistance.

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