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stainless steel Inox-Radial heat exchanger
Gas Boilers

Purposes of the Inox-Radial Heat Exchanger

April 23, 20250

The stainless steel Inox-Radial heat exchanger in Viessmann gas condensing boilers plays a critical role in their efficiency and longevity. Here’s a breakdown of its purposes and benefits:

🔧 Purposes of the Inox-Radial Heat Exchanger

  1. Efficient Heat Transfer
    It maximizes heat extraction from the combustion gases, including the latent heat from water vapor, which is the essence of condensing technology.

  2. Condensation of Flue Gases
    The design promotes condensation of water vapor in the flue gases, capturing additional heat that would otherwise be lost in conventional systems.

  3. Durability & Resistance
    It’s made of high-grade stainless steel (Inox), which resists corrosion caused by acidic condensate—a common byproduct of condensing operation.

Benefits of the Inox-Radial Heat Exchanger

  1. Higher Efficiency

    • Achieves efficiency ratings of up to 98% (Hs) or 109% (Hi).

    • Reduces fuel consumption and CO₂ emissions.

  2. Long Service Life

    • Corrosion-resistant stainless steel ensures longevity even under constant exposure to moisture and acidic condensate.

  3. Low Maintenance

    • Smooth, self-cleaning surfaces reduce the buildup of soot and residues.

    • Leads to fewer service calls and consistent performance over time.

  4. Compact and Space-Saving

    • Radial design is compact, enabling smaller boiler dimensions and easier integration into homes or commercial buildings.

  5. Sustainability

    • Reduced fuel use and emissions support eco-friendly heating.

In short, the Inox-Radial heat exchanger is a key reason Viessmann condensing boilers are known for exceptional efficiency, reliability, and low lifetime cost.

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Viessmann stainless steel heat exchanger
Vitodens-100-W boiler
Gas Boilers

Viessmann urges domestic installers to consider lower-output boilers.

November 14, 20230

With the cost of living and energy crises deepening and as the country hits much colder winter temperatures, Irish homeowners facing boiler replacements are looking for ways to reduce the cost of a new boiler, increase efficiency and lower their bills. 

One way in which heating installers can help is to check, in the case of system boilers, that the output of the proposed model matches the heat demand of the home. It is often the case that installers replace a boiler like-for-like when it comes to output. This often results in boilers being specified with a higher output than actually needed. Viessmann is urging installers to consider fitting a lower output boiler if possible.

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what size boiler do you need
Gas Boilers

What size boiler do I need?

March 30, 20220

A new boiler should be seen as a necessary home investment, and this is why it’s so important that you make the right choice. When it’s regularly serviced and properly maintained, a boiler should last up to around 15 years, and will be solely responsible for delivering heat and hot water to your home.

When choosing a boiler, size is really important. Too big and it might use too much energy to heat water you’re not going to use and too small, you might find yourself running out of hot water or left with a cool house that cannot heat up properly.

So what factors do you need to consider before choosing a boiler size?

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