Vaillant flat collector 2.51 auroTHERM | VFK 145/3 V

2025-04-16T12:24:50+02:00

Vendor: Vaillant
Type: Collectors
Price: 967.58

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