Vaillant 20135129 Stainless Steel Main Heat Exchanger for ecoTEC Plus 24kW Combi gas Boiler

A true replacement is more than a matching part number. It requires matching geometry, heat-transfer performance, connection accuracy and pressure integrity.

Vaillant 0020135129 Heat Exchanger Compatible with ecoTEC Plus 612 / 615 / 618 / 824 & Pro 24 models

A true replacement is more than a matching part number. It requires matching geometry, heat-transfer performance, connection accuracy and pressure integrity.

ecoTEC Plus 612 Series (System Boiler)

• 612 VU 126/3-5 R1 (2005–2012) – GC 41-044-44 R1

• 612 VU 126/5-5 (2012) – GC 41-044-60

• 612 VU 126/5-5 R1 (2012–2013) – GC 41-044-60 R1

• 612 VU 126/5-5 R2 (2013–2015) – GC 41-044-60 R2

ecoTEC Plus 615 Series (System Boiler)

• 615 VU 156/3-5 R1 (2005–2012) – GC 41-044-45 R1

• 615 VU 156/5-5 (2012) – GC 41-044-61

• 615 VU 156/5-5 R1 (2012–2013) – GC 41-044-61 R1

• 615 VU 156/5-5 R2 (2013–2015) – GC 41-044-61 R2

ecoTEC Plus 618 Series (System Boiler)

• 618 VU 186/3-5 R1 (2005–2012) – GC 41-044-46 R1

• 618 VU 186/5-5 (2012) – LPG GC 41-044-66 / NG GC 41-044-62

• 618 VU 186/5-5 R1 (2012–2013) – LPG GC 41-044-66 R1 / NG GC 41-044-62 R1

• 618 VU 186/5-5 R2 (2013–2015) – LPG GC 41-044-66 R2 / NG GC 41-044-62 R2

ecoTEC Plus 824 Series (Combi Boiler)

• 824 VUW 246/3-5 R1 (2005–2011) – GC 47-044-31 R1

• 824 VUW 246/3-5 R3 (2011–2012) – GC 47-044-31 R2

• 824 VUW 246/5-5 (2012) – GC 47-044-40

• 824 VUW 246/5-5 R1 (2012–2013) – GC 47-044-40 R1

• 824 VUW 246/5-5 R2 (2013–2015) – GC 47-044-40 R2

ecoTEC Pro 24 Series (Combi Boiler)

• 24 VUW 246/3-3 R1 (2006–2008) – GC 47-044-36 R1

• 24 VUW 246/3-3 R2 (2008–2012) – GC 47-044-36 R2

• 24 VUW 246/5-3 (2012) – GC 47-044-44

• 24 VUW 246/5-3 R1 (2012–2013) – GC 47-044-44 R1

• 24 VUW 246/5-3 R2 (2013–2015) – GC 47-044-44 R2

• Same Manufacturing Principles. Consistent Replacement Performance.

  A replacement heat exchanger should not simply look like the original. Its material, tube geometry, forming process, welding quality and pressure integrity all influence long-term boiler performance.

  Our  heat exchanger is manufactured using the same fundamental engineering principles widely used in European high-efficiency condensing boiler heat exchangers.

  The production process includes stainless steel tube forming, precision coil bending, hydroforming, controlled welding, assembly, dimensional inspection, hydrostatic pressure testing and leak testing.

  Hydroforming creates controlled tube geometry and consistent spacing between heat-transfer tubes, helping optimize heat transfer and maintain stable gas flow through the heat exchanger.

  Combined with stainless steel construction and controlled welding, the result is a replacement component designed for reliable installation, efficient heat transfer and consistent long-term performance.

  For distributors and boiler service companies, this provides a practical alternative for maintaining compatible Vaillant condensing boilers while supporting stable aftermarket supply.

  Key Selling Points:

• OEM-style manufacturing process
• Direct replacement design
• Stainless steel construction
• Hydroformed heat-transfer coil
• Consistent tube spacing
• Efficient thermal transfer
• Pressure and leak testing
• Professional B2B supply