Dunster Heat offers the full range of Akvaterm accumulator tanks. Reliable and efficient wood boilers are only as good as the hot water tanks they heat.

Akvaterm has been designing and manufacturing accumulators since 1993. They are the market leader in Finland, supplying very efficient and easy to maintain accumulators that deliver exceptional performance.

For technical information and schematics for all Akvaterm accumulators please click here

The Akvaterm hot water tanks (accumulators) can easily be used with different heating and energy sources, giving you the freedom of choice.

You will find exactly the right hot water tank for your home - from the easy-to-use and easy-to-maintain Akvaterm range - which is why we "teamed" these accumulators up with the Vigas Wood Fuel boilers.

In addition to the standard products - which ranges from 300 to 10,000 litre tanks - Akvaterm can build special tanks tailored to your exact needs.

Akvaterm Akva

AKVA Standard Accumulator Tank

Capacity 300-10,000 litres. The insulation is 100-mm seamless polyurethane faced with steel sheet. Detachable side panels are also an option. An un-insulated accumulator tank coated with corrosion protection paint can also be delivered. The upper hatch has a standard hot water coil. A domestic hot water pre-heating coil, a solar heating coil, heat collector exchanger and other units can be placed in the lower hatch. Below this are 2” ports for the immersion heaters used during the night. The immersions used during the day are in the centre, and built-in guide pipes ensure the proper layering of heat.

Akvaterm Solar

AKVAir Solar - The sunny side of heating. 300-1000 litres, 3bar

AKVAir Solar models are designed to get the most heat out of your solar heating system.

Connecting your AKVAir Solar to provide the best efficiency to domestic hot water and central heating from solar energy.

Akvaterm Avanti – Oval

AKVANTTI Oval Accumulator Tank

For new construction and renovations. Capacities 1400 litres, 2000 litres and 2400 litres.
The most efficient hot water coil on the market (45 l/min), also available without a domestic hot water coil. The depth is only 810 mm.

Akvaterm Akvasan

AKVASAN 500-700 litres -to be used in confined spaces

Developed for constrained spaces and narrow openings, this model’s diameter is only 810 mm. The AKVASAN 0.5 series is particularly compact; the advantages of the efficient cylinder format have been retained. The insulation is the same as in the standard accumulator tanks, but its thickness is 50 mm due to the smaller surface area. The EK models are equipped with a domestic hot water coil, as well as daytime and nighttime resistor units.

Energy sources

The use of an Akvaterm accumulator tank is independent of the heating system or energy source. Besides the sun, wood, chips, wind or geothermal heat, the heating source can be traditional electricity, oil or gas heating, or their combinations. If required, energy sources can be modified or the heating system can be supplemented. Akvaterm is part of an entity that facilitates the production of pleasant and balanced heating for living, as well as domestic hot water, with the same system.

The use of an Akvaterm accumulator tank is independent of the heating system or energy source. Besides the sun, wood, chips, wind or geothermal heat, the heating source can be traditional electricity, oil or gas heating, or their combinations.

If required, energy sources can be modified or the heating system can be supplemented. Akvaterm is part of an entity that facilitates the production of pleasant and balanced heating for living, as well as domestic hot water, with the same system.