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

Vaillant 20135129 Stainless Steel Main Heat Exchanger – Direct Replacement Solution

The Vaillant 20135129 Stainless Steel Main Heat Exchanger is designed as a direct replacement for compatible condensing gas boilers, with the key dimensions, tube configuration and connection positions engineered to match the original component.

For heating engineers and boiler repair companies, this means no unnecessary modification during installation and a straightforward replacement of the existing heat exchanger.

Manufactured using controlled stainless steel tube forming, precision bending, hydroforming and welding processes, the heat exchanger is designed to deliver consistent heat-transfer performance and reliable sealing.

Each production batch is subject to dimensional inspection and pressure/leak testing to help ensure installation accuracy and water-side integrity.

Key Benefits:

• Direct replacement for compatible Vaillant 20135129 applications
• OEM-equivalent design and manufacturing principles
• Precision stainless steel heat-transfer structure
• Controlled tube spacing for efficient heat transfer
• Reliable welded connections
• Pressure and leak tested
• Ideal for boiler engineers, repair companies and spare-parts distributors

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

The Vaillant 0020135129 new heat exchanger is a high-quality inside ecoTEC Plus boilers. As the heart of the boiler, the heat exchanger transfers energy from combustion to your heating water supply.

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

Vaillant 0020135129 Heat Exchanger main combi ecoTEC Plus 612 / 615 / 618 / 824 & Pro 24 models Stainless Steel Heat Exchangers For Residential And Commercial Boiler Systems

Meets EU ErP Directive and all major global environmental standards

FAQ

We are ready to be your trusted manufacturing partner for full premix condensing stainless steel heat exchangers.

Contact us today for:

· Product catalog and price list

· Custom design consultation

· Fast sample evaluation

· OEM/ODM cooperation discussion

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