Vaillant ecoTEC Plus 635 35kW System Boiler

The Vaillant ecoTEC Plus 635 35kW System Boiler is a highly efficient, smart home compatible system boiler designed for medium to large homes. Featuring advanced IoniDETECT combustion technology and a wide modulation range of up to 1:9, it delivers precise heating control and rapid hot water delivery with energy savings and reduced emissions.

Key Features

• IoniDETECT Technology: Intelligent gas combustion monitoring for optimized efficiency and performance.
• Smart Home Ready: Compatible with myVAILLANT connect for remote control and diagnostics.
• Hydrogen Prepared: Suitable for use with up to 20% hydrogen gas blends, future-proofing your installation.
• Easy Installation: Retains familiar footprint with semi-touch intuitive interface and guided commissioning wizard.
• Automatic LPG Conversion: Can be quickly converted during installation using the interface, no extra parts needed.
• Enhanced LINbus Technology: Delivers accurate flow rate and pressure readings via internal pump for superior system control.

Technical Specifications

Why Buy

The ecoTEC Plus 635 delivers a combination of smart technology, robust build and energy-efficient performance suitable for UK homes with stored hot water systems. Its hydrogen readiness and smart home compatibility future-proof your heating, while the familiar footprint ensures quick upgrades. Semi-touch controls simplify commissioning and maintenance for installers.

Suitable For

• Medium to large homes requiring efficient system boilers.
• Smart home users seeking app connectivity and precise control.
• Installations needing easy LPG conversions and straightforward servicing.

Order now for a reliable, cutting-edge Vaillant system boiler with advanced combustion control and smart home features.

Please note: Delivery times may vary depending on location, with specific details outlined below.

Standard Delivery

UK Mainland 

• Delivery Time: 2–4 working days
• Free Delivery on most orders
• £4.95 for small items
• £69 for Solar Panels, Batteries and other specialized large items delivery

Express Delivery

UK Mainland

• Delivery Time: 1–3 working days
• Free Delivery
• £4.95 delivery for small items

Channel Islands

• Postcodes Covered: GY*, IM*, JE* 
• Minimum Order: £50
• Delivery Fee: £70

Northern Ireland, Offshore Territories & Scottish Islands 

• Postcodes Covered: BT*, HS*, KW, ZE
• Minimum Order: £50
• Delivery Fee: £35

Same Day Delivery 

• Eligible Postcodes:
  E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW*
• Minimum Order: £50
• Same Day Delivery Fee: £60
• Special Requests or Locations:
  For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.

Collections

Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.

Collection address: 284 Water Rd, Unit 9, London, HA0 1HX