WUNDER ANP 1808
High-performance 1.8 m² selective-surface solar thermal collector designed for residential, commercial, and industrial hot water applications.
WUNDER ALS DRAIN 2108
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WUNDER ALS DRAIN 2108
High-efficiency 2.4 m² drain-back thermal collector with highly selective Almeco-Tinox absorber and laser-welded copper pipes.
- Superior Solar Absorption – Almeeco-Tinox selective coating and laser-welded copper pipes maximize heat transfer and efficiency.
- Durable & Weather-Resistant – Reinforced aluminum frame with tempered glass withstands harsh conditions.
- Easy & Fast Installation – Quick-mounting system compatible with all standard roof types.
- High-Performance Insulation – Rock wool insulation minimizes heat loss for colder climates.
- Certified & Long-Lasting – Solar Keymark certified with a 10-year system warranty.
Efficient Solar Heating with WUNDER ALS DRAIN
The WUNDER ALS DRAIN 2108 Thermal Collector is a cutting-edge solar heating solution that combines advanced technology with robust engineering. Its highly selective Almeco-Tinox absorber ensures maximum solar energy absorption, while the laser-welded copper pipes enhance heat transfer efficiency.
Built to withstand the toughest conditions, the WUNDER ALS DRAIN 2108 features a reinforced aluminum frame and tempered glass, providing exceptional durability and resistance to environmental stress. The rock wool insulation minimizes heat loss, ensuring consistent performance even in colder climates.
Installation is quick and hassle-free, thanks to the easy-to-use fastening system designed for all standard roof types. This reduces installation time and minimizes the need for heavy equipment, making it a cost-effective choice for both new and existing buildings.
Backed by a 10-year system warranty and Solar Keymark certification, the WUNDER ALS DRAIN 2108 is a trusted and eco-friendly solution for all hot water needs.
General
Dimensions
mm
1988×1041×90
Weight
kg
29
Gross Area
m²
2.07
Aperture Area
m²
1.89
Absorber Area
m²
1.93
Absorptance
0.95
Emittance
0.03
Absorber Material
Highly selective aluminum
Glass Material
Low Iron Tempered Glass
Glass Thickness
mm
3.2
Heat Carrier Volume
L
1.67
Absorber Pipe Diameter
mm
8
Header Pipe Diameter
mm
18
Connection
inch
3/4"
Insulation Material
Rock Wool
Insulation Thickness
mm
40
Stagnation Temperature
°C
200
Maximum Operation Pressure
Bar
10
Nominal Flow Rate
kg/hm²
72
Notes
- Solar Keymark certified with a 10-year system warranty.
- Turbulent flow design enhances heat transfer efficiency.
- Compatible with all standard roof types using the modular fastening system.
- Suitable for residential, commercial, and industrial applications.
Contact quality@solimpeks.com for local certificates / OEM certificate duplication requests.
Understand the technology
Explainers from our Knowledge Hub on how this technology works.
Guides
Solar Thermal Collectors: The Complete Guide
Solar thermal collectors convert sunlight directly into usable heat with efficiencies of 60–80% — three to four times the...
Common Questions
Flat-plate vs evacuated tube collectors: which is better?
Flat-plate collectors are the better choice for domestic hot water in sunny and temperate climates: higher optical efficiency...
Glossary
Collector Efficiency Curve (η0, a1, a2)
The collector efficiency curve states how a solar collector's efficiency falls as it runs hotter than its surroundings: η = η0 −...
Glossary
Solar Keymark
Solar Keymark is the leading European certification for solar thermal products, issued under the CEN Keymark scheme. It proves a...
Frequently asked questions
Short, factual answers about the WUNDER ALS DRAIN 2108.
Is the WUNDER ALS DRAIN 2108 Solar Keymark certified?
Yes. The Wunder collector range holds Solar Keymark certification issued through DIN CERTCO, and the WUNDER ALS DRAIN models are covered by DIN CERTCO licence 011-7S2021 F. Solar Keymark is the European quality mark that most national subsidy schemes require before a collector qualifies for funding.
How efficient is the WUNDER ALS DRAIN 2108's absorber?
The selective-coated absorber reaches an absorptance of 0.95 while keeping emittance at 0.03, meaning it captures 95% of incoming solar radiation and re-radiates very little of it as heat loss. Aperture area is 1.89 m².
How many collectors do I need for my home?
For domestic hot water, plan roughly 1-1.5 m² of flat-plate collector area per person in southern climates and 1.5-2.5 m² per person in central and northern Europe, with 40-60 litres of storage per m² of collector. A family of four typically needs 2 collectors and a 300 L tank in Turkey or Spain, or 3 collectors and 300-400 L in Germany.
What does the drain-back design do?
In a drain-back system the collector empties its heat-transfer fluid into a reservoir whenever the pump stops. Because no fluid sits in the collector during standstill, the design protects against both freezing and stagnation overheating without relying on glycol concentration checks.
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