DELTA TWINCOIL series is the most efficient solar thermal cylinder available, incorporating our unique award-winning Vacuum Insulation Panels enabling the DTC cylinders to be ErP Bated from 200 – 300 L. DELTA series can save enough energy to pay for the entire cylinder over its lifetime.

DELTA TWINCOIL— DTC is ideal for domestic hot water production from solar collectors up to 12 m² in combination with boilers.

DELTA TWINCOIL is the most efficient solar cylinder available and can provide up to 60% of annual DHW requirements from solar collector. A complete set of inlet control valves comes standard.

The DTC units can be controlled either via its own digital thermostat or using thermistor probe(s). DELTA TWINCOIL is compatible with both S & Y plan systems.

Reduces heat loss by 400 kWh / year with NANOPUR and VIP*
Ultra-grade INCOTEC immersion heater as booster (or back-up)
25 year warranty on the stainless steel tank
Smooth scale resistant coil
Delta has holiday and anti-legionalla functionality.

*Vaccuum Insulation Panels



SpecificationsUNITDTC 200 - 3 kW / 1 × 240 V + HX 0,8 + 0,8 m²DTC 250 - 3 kW / 1 × 240 V + HX 0,8 + 0,8 m²DTC 300 - 3 kW / 1 × 240 V + HX 0,8 + 0,8 m²
Product no.OSO10 211 60010 211 70010 211 800
Product nameDTC 200DTC 250DTC 300 
Diameter — ⌀mm595595595
Height - Hmm127015401750
Weight emptykg237294342
Technical/ErP information
Capacity 40CLN / AN / AN / A
Thermostat set pointC606060
Heat loss-EN 12897watt495458
Heat loss / 24 hrs - EN 12897kWh/day1,181,301,39
AEC (energy consumption)kW/yearN / AN / AN / A
Energy efficiency%N / AN / AN / A
Tapping profile3XS–XXLN / AN / AN / A
Energy ratingA+–FBBB
Primary Heating PowerkWN/AN/AN/A
Primary coil sizeMins0.80.80.8
Immersion Heating Power3Kw3Kw3Kw
Heat-up time ΔT 55°C CoilMinsN/AN/AN/A
Heat-up time ΔT 55°C upper elementMinsN/AN/AN/A
Heat-up time ΔT 55°C lower elementMinN/AN/AN/A
Recovery time ΔT 55°C coil 70%MinsN/AN/AN/A
Recovery time ΔT 55°C upper element 70MinsN/AN/AN/A
Recovery time ΔT 55°C lower element 70%MinsN/AN/AN/A