Vaillant Combi Gas Boiler Condensing Stainless Heat Exchanger 24-28KW

Combi Gas Boiler Condensing Stainless Steel Heat Exchangers 24-28KW

Product Introduction

 24-28KW Stainless Steel Heat Exchanger Units Designed for Condensing Gas Boiler Home Heating and Domestic Hot Water Applications

Introduction & Key Advantages

What Is a Stainless Steel Heat Exchanger for Modern Condensing Gas Boilers
   A condensing heat exchanger recovers thermal energy from water vapor in exhaust gases by converting the vapor into liquid water. This process captures hidden heat energy for improved efficiency.
   Up to 107–109% thermal efficiency — much greater than conventional heat exchangers (85–95%).
   Higher heating efficiency. Lower fuel usage. Reduced energy expenses.

What Is a Gas Condensing Heat Exchanger?
A full premix combustion system blends gas and air completely before ignition. This advanced combustion method provides:
  Ultra low harmful emissions
  Reliable and secure performance
  Greater heat generation using the same fuel supply

Where Is It Used?

Key Advantages

1. Much Higher Efficiency — Saves Money

· Thermal efficiency: 107–109% (vs. 85–95% for ordinary boilers)

· Less gas used for the same heat output

· End users pay less on their energy bills

2.  Stainless Steel — Built to Last

· Made from stainless steel

· Handles acidic condensate (pH 3–5) with no problem

· No rust. No corrosion. No leaks.

· Expected service life: 15+ years

3.  Low Emissions — Clean & Green

· Meets EU ErP Directive and all major global environmental standards

· Helps customers stay ahead of tightening regulations

4. Smart Design — Better Performance

· Spiral finned tube structure increases heat transfer surface by 40–60%

· Multi-pass water circuit design for stronger turbulence and better heat exchange

· Low water resistance — works with smaller pumps → saves electricity

5.  Quiet & Stable

· Smooth flame, no pulsation

· Quiet operation — suitable for homes and hospitals

· No hot spots → no cracking, no breakdowns

6. OEM & Custom Service Available

· Standard sizes in stock for quick delivery

· Custom design & tooling to match your specific boiler model

· Full technical support: heat load calculation, product selection, testing

· Your brand logo can be applied (OEM/ODM welcome)

Why Choose Us?

You get the same quality. You keep more profit. You get better service.

Simple Comparison

Our Promise to You

 Same technology as leading manufacturers
 Same quality standards — ISO certified production
 Better price — improved profit margins
 Faster delivery — no long overseas waits
 Full support — from selection to after-sales

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

Certificate

Product packaging