Vaillant flat collector 2.51 Aurotherm | VfK 145/3 V

The system described here is eligible for funding under BEG EM (Federal Funding for Efficient Buildings – Individual Measures).

Solar collector systems receive up to 30% funding on the costs for purchase and installation. Optional bonuses are Up to 70% funding possible!

Find out more in our Guide to heating subsidies about the general conditions and the application process.

VAILLANT flat collector auroTHERM VFK 145/3 V

The Vaillant 2.51 flat-plate collector is available in four versions: the auroTHERM plus VFK 155 and auroTHERM VFK 145 are available in vertical and horizontal versions for pressure-controlled solar systems. The vertically oriented auroTHERM classic VFK 140 and VFK 135 flat-plate collectors are specially designed for use in return-flow solar systems. All collectors look stunning on your roof, leaving your neighbors in awe. Yet the most important thing remains invisible: your heating cost savings thanks to high solar yields.

The perfect combination of high efficiency and excellent design

Advantages of the Vaillant flat collector 2.51:

• High efficiencies of up to 85%
• Elegant appearance plus high product quality made in Germany
• Free solar heat provides around 60% of the energy for hot water and 20% of the heating energy
• State and municipal funding for modernization for the use of renewable energy can be combined
• Available for both pressure and return flow solar systems

Special features of the flat collector:

• Collector with homogeneous disc surface, 2.51 m² gross area
• Structural glass 3.2 mm (solar safety glass)
• Solar-assisted hot water preparation and heating support
• On-roof, in-roof and flat roof installation, pitched roof mounting and facade installation possible
• For vertical mounting
• Black anodized aluminum frame

Product features:

• Highly selective coated aluminum/copper absorber (serpentine)
• Low height
• Low weight

Scope of delivery:

• 1 auroTHERM VFK V
• Installation instructions

Technical data:

• Collector classification: Flat collector
• Gross area: 2.51 m²
• Aperture area: 2.35 m²
• Solar safety glass transmission τ 1): 90.5%
• Absorber absorption α 1): 95%
• Absorber emission ε 1): 5%
• Standstill temperature (according to prEN 12975-2): 200 °C
• Collector contents: 1.85 l
• Solar connection (flow and return): G 3/4
• Solar sensor sleeve: Ø 6 mm
• Minimum collector yield: 525 kWh/m²a
• Product dimensions (height/width/depth): 2,033/1,233/80 mm
• Product weight: 36 kg
• 1) Tolerance range +/-2