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



SpecificationsUNITRI 150 - 3 kW / 1 × 240 V + HX 0,7 m²
Product no.OSO1 326 200
Product nameRI 150 
Diameter — ⌀mm430
Height - Hmm1610
Weight emptykg43
Technical/ErP information
Capacity 40CL
Thermostat set pointC60
Heat loss-EN 12897watt76
Heat loss / 24 hrs - EN 12897kWh/day1,82
AEC (energy consumption)kW/year
Energy efficiency%
Tapping profile3XS–XXL
Energy ratingA+–FC
Primary Heating PowerkW16,5
Primary coil sizeMins0.7
Immersion Heating Power3Kw
Heat-up time ΔT 55°C CoilMins24
Heat-up time ΔT 55°C upper elementMins
Heat-up time ΔT 55°C lower elementMin
Recovery time ΔT 55°C coil 70%Mins17
Recovery time ΔT 55°C upper element 70Mins
Recovery time ΔT 55°C lower element 70%Mins