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

solar collector systems are maintained up to 30% funding at the costs for purchase and installation. Through optional bonuses Up to 70% funding possible!

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

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 configurations for pressurized solar thermal systems. The vertically oriented flat-plate collectors auroTHERM classic VFK 140 and VFK 135 are specifically designed for use in return-flow solar thermal systems. All collectors look fantastic on your roof, sure to impress your neighbors. And yet, the most important thing remains unseen: your heating cost savings thanks to high solar yields.

The perfect combination of high efficiency and excellent design

Advantages of the Vaillant flat plate collector 2.51:

• High efficiencies of up to 85%
• Elegant design plus high product quality made in Germany
• Free solar thermal energy provides around 60% of the energy for hot water preparation and 20% of the heating energy.
• State and municipal funding for modernization projects that utilize renewable energy can be combined.
• Available for both pressure-controlled and return-flow solar systems

Special features of the flat plate collector:

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

Product features:

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

Scope of delivery:

• 1 auroTHERM VFK V
• Installation instructions

Technical data:

• Collector classification: Flat plate 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 capacity: 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