SLIMLINE is the slimmest domestic cylinder available at only 430 mm diameter, making the cylinder ideal for installation in tight spaces. The cylinder has a large heating coil for fast heating and also back-up electric heating from an immersion heater. Low heat loss comes from uitilising unique Vacuum insulation Panel technology with NANOPUR insulation. High flow rates provide powerful showers.

The cylinder is floor mounted and is supplied with a wall bracket for stabilization. An external expansion vessel is supplied, complete with its own wall bracket.

SLIMLINE is easy to fit and follows a similar installation technique to the OSO Delta and Ecoline cylinders. Heating coils in OSO cylinders are made of smooth coil that will not encourage lime-scale deposits and offer longer and more efficient life than finned or rippled coils. OSO coils have increased length compared to finned coils, carry more heating fluid and therefore have a greater heat transfer capacity.

It is the slimmest domestic cylinder available at only 430 mm
Reduce heat loss by 300 kWh* */ year with NANOPUR an VIP
Smooth scale resistant coil
25 year warranty on the stainless steel tank


NANOPUR – Class leading insulation
ULTRAWELD – Superior corrosion resistance
INCOTEC – High durability in hard water
SMOOTH COIL – Does not encourage limescale build-up


Thermostat – Adjustable 40-70°C – Preset 65°C
P&T safety valve – 10 bar – 90-95°C
Integrated G3 kit – Strainer/PRV/exp. relief/drain cock/tundish
Expansion vessel – Supplied, incl. wall bracket
Stability bracket – Stainless steel – included

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Specifications Unit RI 150 - 2 kW / 1 × 230 V + HX 0,7 m²
Product no. OSO 1 326 200
Product series. SLIMLINE
Product name RI 150 - 2 kW / 1 × 230 V + HX 0,7 m²
Usage Hot Water
Placement Floor
Diameter — ⌀ mm 430
Height - H mm 1610
Weight kg 43
Packaging mm 470x470x1770
Freight Volume dm3 0.39
Technical / ErP information
Capacity Persons 2,5
Capacity 40C L
Volume L 150
Thermostat set point C 60
Heat loss - EN 12897 Watt 76
Heat loss / 24 hrs - EN 12897 kWh/day 1.82
AEC (energy consumption) kW/year
Energy efficiency %
Tapping profile 3XS–XXL
Energy rating A+–F C
Primary Heating Power kW 16.5
Heat-up time ΔT 55°C Coil Mins 24
Heat-up time ΔT 55°C upper element Mins
Heat-up time ΔT 55°C lower element Mins
Recovery time ΔT 55°C coil 70% Mins 17
Recovery time ΔT 55°C upper element 70% Mins
Recovery time ΔT 55°C lower element 70% Mins