MAXI ACCU HEAT – MA is an ideal accumulator tank for storage of hot water from heat pump / solar collectors, ensuring optimal working conditions for the energy source and providing stable temperature to the system.

The MAXI series is the class-leading commercial range of hot water calorifiers, built to the high standards of design and efficiency that is synonymous with OSO Hotwater products. The MAXI range has been manufactured with EVERLAST™ high-alloy stainless steel in combination with ULTRAWELD™ technology for optimal corrosion resistance.

ACCU - A - is specially designed as a heat accumulator tank for heat pump or solar collector. The ACCU has a dual set of return connections, which provide flexible connection and placement options, in addition to a separate Ø22 mm air connection and drain connection. ACCU ensures that the
energy source has optimal operating conditions and provides a stable temperature for the plant. The choice of size depends on the heat pump’s needs and must be dimensioned in each individual case.

ACCU is a series of highly energy-efficient, foam-insulated buffer tanks for heating systems.
ACCU is in stainless steel design which ensures a trouble-free system in relation to. buffer tanks in steel. ACCU uses the same stylish design as the VERSA series and fits perfectly into any heating system.

DELTA GEOCOIL – DGC – is specially designed for maximum efficient hot water production against all types of heat pumps up to 18kW (200 L = 15kW / 300 L = 18kW), thanks to the large heating surface (2.6 – 3.1 m²) on the heat exchanger. DELTA GEOCOIL comes standard with electric heating element at the bottom of the tank for maximum protection against legionella (must be controlled externally). The element can also be used as a backup for the heat pump when needed, which provides maximum operational reliability. Mixing valve can easily be retrofitted as an option if required.

DELTA is our most energy-efficient water heater series, and minimizes heat loss with increased insulation, the use of vacuum panels and functional design. DELTA has been developed with a number of smart technical solutions especially suitable for alternative energy sources such as heat pumps, solar collectors or bio water heaters. DELTA also has unique corrosion protection and can withstand 3 × higher salt content than other water heaters.

OPTIMA COIL – OC – covers the hot water requirement for approx. 6 people and the heat demand in homes up to approx. 400 m² in a single unit. OPTIMA COIL is very suitable for heat pumps where hot water prioritization is not used. The heat pump preheats the hot water efficiently via the stainless steel heat exchanger and the bottom of the hot water tank with a total heating surface of 1.4 m² integrated in the buffer tank. OPTIMA COIL is also available for high temperature systems and is a perfect replacement for oil water heaters. All OPTIMA models have an electric element for the heating system and electric supplemental heat for the hot water, which further increases performance.

OPTIMA is the market’s most advanced and energy efficient tank-in-tank products, with foam insulation and patented solutions to increase hot water production from alternative energy sources. The OPTIMA series integrates both stainless steel buffer tank and heat exchangers in one unit, and takes up minimal space.

The hot water cylinder SAGA COIL – SC – is designed for high temperature energy sources such as gas, bio-water heater or district heating up to 25 kW due to the integrated, efficient pipe coil. SAGA COIL has a large capacity as the added power can be significant, and hot water will almost always be available. SAGA COIL is delivered with sensor pocket, pressure and temperature release and separate drain valve. The electric heating element can be used during summer operation or as a back-up. SAGA COIL should be selected for high temperature energy sources.

SAGA is Norway’s best-selling water heater for several decades. Modern and practical design hides all pipes and connections. SAGA is easy to install with all pipe connections on top and is directly suitable as a replacement for OSO waterheaters from 1980 without changing the pipe layout. The mixing valve lowers the outgoing water temperature and prevents the risk of scalding. SAGA has the market’s lowest heat loss in combination with high storage temperature for unbeatable performance and more hot water.