Boiler design

Fleece insulation X
Up to 38 per cent less storage loss as compared to soft foam insulation thanks to the energy-saving and environmentally friendly 100 mm fleece insulation.
Heating coils X
Available with zero, one or two heating coils to integrate various heating sources
Water provision X
Provision of hygienic hot water using an inner stainless steel tube
Different capacities X
Capacity of 500 to 5000 litres (special sizes are available)
Cogent to the smallest detail
- Up to 38 per cent less storage loss as compared to soft foam insulation thanks to the energy-saving and environmentally friendly 100 mm fleece insulation.
- Available with zero, one or two heating coils to integrate various heating sources
- Provision of hygienic hot water using an inner stainless steel tube
- Capacity of 500 to 5000 litres (special sizes are available)
The advantages at a glance
+ Efficient heat storage
+ Provision of hygienic hot water using an inner stainless steel tube
+ No extra hot water tank needed

Preparation of hygienic hot water
If required, fresh water flows through the large, inner stainless steel tube and is quickly heated by the heat stored inside the accumulator. Using this flash heating principle is a very hygienic way to heat your hot water.
Technical data
The Windhager AccuWIN Fresh hygiene accumulator is available with one (four versions) or two (three versions) heating coils.
AccuWIN Fresh: 1 heating coils
Type | ACF 501R | ACF 801R | ACF 1001R | ACF 1501R | |
Contents | approx. l | 500 | 800 | 1,000 | 1,500 |
Stainless steel tube | m2/l | 5.0/25 | 6.5/33 | 7.5/39 | 7.5/39 |
Coil heater surface top/bottom | m2 | 1.8/– | 2.5/– | 3.1/– | 3.5/– |
Coil heater content top/bottom | l | 12/– | 17/– | 21/– | 24/– |
ø not including insulation | mm | 650 | 790 | 790 | 1000 |
Height not including insulation | mm | 1640 | 1700 | 2050 | 2150 |
Height including insulation | mm | 1725 | 1785 | 2135 | 2235 |
Tilted height not including insulation | mm | 1670 | 1750 | 2090 | 2270 |
Weight not including insulation | kg | 117 | 159 | 186 | 280 |
Supply and return connections | 6/4" int. thr. | 6/4" int. thr. | 6/4" int. thr. | 6/4" int. thr. | |
Energy efficiency class | C | C | C | C |
AccuWIN Fresh: 2 heating coils
Type | ACF 802R | ACF 1002R | ACF 1502R | |
Contents | approx. l | 800 | 1,000 | 1,500 |
Stainless steel tube | m2/l | 6.5/33 | 7.5/39 | 7.5/39 |
Coil heater surface top/bottom | m2 | 2.5/1.6 | 3.1/2.4 | 3.5/2.4 |
Coil heater content top/bottom | l | 17/11 | 21/15 | 24/15 |
ø not including insulation | mm | 790 | 790 | 1000 |
Height not including insulation | mm | 1700 | 2050 | 2150 |
Height including insulation | mm | 1785 | 2135 | 2235 |
Tilted height not including insulation | mm | 1750 | 2090 | 2270 |
Weight not including insulation | kg | 175 | 216 | 310 |
Supply and return connections | 6/4" int. thr. | 6/4" int. thr. | 6/4" int. thr. | |
Energy efficiency class | C | C | C |