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MPN: 10036014

Vaillant ecoTEC Plus 635 System Boiler

Vaillant ecoTEC Plus 635 System Boiler


Regular price £1,982.53 Excl. VAT
£2,379.04 Incl. VAT
Sale price £1,982.53 Excl. VAT
£2,379.04 Incl. VAT
Regular price
*For business & Trade Accounts only.
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Key Information

  • - Product type: System boiler.
  • - Dimensions: 386 mm.
  • - Compatibility: Vaillant controls, flues, and accessories.
  • - Weight: 41 kg.
  • - Warranty: 5 years (extendable to 10 years with Vaillant Advance Installer).

Product Information

Vaillant ecoTEC Plus 635 System Boiler

The Vaillant ecoTEC Plus 635 System Boiler is a practical choice for customers comparing system boilers, offering dependable heating performance for homes with a separate hot water cylinder. If you are reviewing system boiler prices, this Vaillant model gives you a clear option to compare by output, fuel type, controls and installation requirements before choosing the right boiler for your property. The Vaillant ecoTEC Plus 635 System Boiler is a powerful, high-efficiency heating solution from Vaillant's latest range, designed to deliver exceptional performance while keeping installation and servicing straightforward. With a refined internal layout and improved access to key components, this model helps engineers work more efficiently while ensuring long-term reliability for homeowners. This updated ecoTEC Plus model features a modern semi-touch interface, making setup and operation simple and intuitive. The guided commissioning wizard takes installers through each stage of the process, while the clear display and easy navigation make day-to-day use effortless. With the same footprint, pipe connections, and flue positioning as previous models, it's ideal for quick and hassle-free like-for-like replacements. Advanced performance is driven by Vaillant's latest innovations. IoniDETECT technology continuously monitors combustion, allowing the boiler to operate across a wide modulation range of up to 1:10. This ensures the boiler adapts precisely to heating demand, improving efficiency and reducing energy consumption. linBUS technology further enhances performance by providing accurate readings of flow rate and pressure via the internal pump. Built with flexibility and future readiness in mind, the ecoTEC Plus 635 is hydrogen-ready, meaning it can safely operate with up to a 20% hydrogen blend. It also integrates seamlessly with Vaillant's range of controls, flues, boiler protection kits, and renewable technologies, making it suitable for a wide variety of heating systems. In addition, it is smart home ready and can be connected to the myVAILLANT connect internet gateway for app-based control (additional equipment may be required).

Key Features & Benefits

  • Refined internal layout for easier installation and servicing
  • Intuitive semi-touch interface with guided commissioning wizard
  • IoniDETECT technology for intelligent combustion monitoring
  • Wide modulation range (up to 1: 10) for improved efficiency
  • linBUS technology for enhanced system performance and accuracy
  • Hydrogen-ready for up to 20% hydrogen blend
  • Smart home ready with myVAILLANT connect (additional equipment required)
  • Compatible with Vaillant controls, flues, and accessories
  • Familiar footprint for easy replacement installations
  • Up to 10-year warranty available with Vaillant Advance Installer

Technical Specifications

  • Product Type: Gas System Boiler
  • Model: ecoTEC Plus 635
  • GTIN: 4024074906750
  • Height: 720 mm
  • Width: 440 mm
  • Depth: 386 mm
  • Weight (Net): 38 kg
  • Gross Weight: 41 kg
  • Warranty: 5 years (extendable to 10 years with Vaillant Advance Installer)

Frequently Asked Questions

Is the ecoTEC Plus 635 suitable for larger homes?

Yes, this model is designed for properties with higher heating demands, making it ideal for larger homes or systems requiring greater output.

Can this boiler be controlled remotely?

Yes, it is smart home ready and can be connected to the myVAILLANT connect gateway, allowing remote control via an app when used with compatible controls.

What makes this boiler efficient?

The combination of IoniDETECT technology and a wide modulation range ensures the boiler adjusts precisely to heating demand, reducing energy waste and improving overall efficiency.

Why Choose Us

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

  • Competitive prices on leading brands and quality products.
  • Nationwide delivery across the UK
  • A constantly expanding range of building and landscaping materials.
  • Friendly, knowledgeable customer support.
  • A trusted business backed by the JJ Roofing Supplies Group.

Delivery

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.

Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Vaillant ecoTEC Plus 635 System Boiler

£1,982.53

Can I collect this product from a local branch?

Absolutely. Check availability at your nearest branch during checkout or contact us directly.

Do you offer bulk pricing or trade discounts?

Yes, we offer competitive rates for trade customers and bulk orders. Contact our team for a tailored quote.

What if the product arrives damaged?

Please notify us within 48 hours of delivery. We’ll arrange a prompt replacement or refund as needed.

How fast is the delivery time?

Most items are delivered within 2–5 working days, depending on stock and location. Some products may take longer times.

What is the Return Policy?

We accept most returns within 14 days of delivery, provided the items are unused, in their original packaging, and in resalable condition. Please contact our customer service team to arrange a return or discuss any concerns.