Variable speed split-gas air-con system available from Dometic

 Dometic’s self-contained variable capacity air-conditioning solution – the Dometic Frosty Var (DFV) Dometic’s self-contained variable capacity air-conditioning solution – the Dometic Frosty Var (DFV)
Industry Database

Dometic is committed to cutting power requirements and satisfying demand for more efficient and quieter units and believes it is leading the way in the sector.

As such it is continuing to integrate variable speed technology throughout its next generation of air-conditioning systems.

The company has already had success with its self-contained and chilled water units that feature variable technology and with its latest developments is the only HVAC supplier to offer a variable speed version of a split-gas air-conditioning system.


“Our engineers achieved a real break-through in chiller efficiency with our VARC variable capacity chillers, introducing new and innovative features including the Power Logic Control to modulate speed with thermal load, Wi-Fi capability to precisely manipulate the air conditioning and dual frequency,” explained Paul Hickinbotham, Dometic product director, marine EMEA. “Its steady operation maintains a more constant load on the generator. Instead of turning on and off to maintain temperature, it speeds up or slows down as needed to produce more or fewer BTUs.”

And Paul explained that variable speed capacity provides the right amount of cooling needed for the actual load ensuring better overall efficiency and no harsh in-rush currents to the boat’s generator.


Variable speed units draw less energy, reduce the size of generator needed, reduce energy costs and result in quieter operation.

“Dometic sees variable speed capacity as the future for all marine air-conditioning. It addresses the two big concerns for recreational boaters – noise and energy consumption,” Paul added.

“Now, as the only manufacturer to offer a split-gas option, Dometic is extending the integration of variable speed technology into these systems for a unique and highly-efficient option for OEMs and boat owners in the future.”

Noise reduction

Split-gas, or remote, air-conditioning systems allow the major components to be divided between two units that are installed in different locations enabling the condensing unit with compressor to be mounted in an engine room or other space to reduce noise in the cabin area.

In many cases, OEMs and boat owners select a self-contained direct expansion system for the saloon and a split-gas solution for the cabin.

Dometic’s variable speed split-gas system will be suitable for boats up to 70ft that do not opt for a more expensive chilled water system.

The company is also re-modelling its range of variable speed chillers to offer larger capacity models incorporating a new 10-ton, 3-phase 400V variable speed compressor.

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