04Solution 03

Condensing systems with over 100% efficiency.

Condensing units recover the latent heat of water vapour that would otherwise vanish up the flue. Efficiency exceeds 100% on the net calorific value (PCI). 15–45% savings vs. standard systems.

In classic gas systems the flue gases carry the water vapour, and with it a substantial share of the energy, out through the chimney. Condensing technology cools the flue gases below the dew point so that the water vapour condenses on the heat exchanger and releases its latent heat to the system. Typical savings vs. a non-condensing baseline: 15–45%, depending on the operating regime.

01Savings and performance

Everything the system brings to the project.

Over 100% efficiency on PCI

Capturing the latent heat of water vapour in the flue gases raises the effective efficiency above the nominal net calorific value.

Up to 15% savings vs. new equipment

Comparison against modern non-condensing equipment that meets current minimum standards.

Up to 45% savings vs. 1990s equipment

Against a properly maintained installation from that era a condensing system saves almost half the gas.

Burner power modulation

The burner adapts output to the real demand of the space. At part-load efficiency increases further.

Fast payback

In industrial buildings with high operating hours the investment is paid back in 2–4 years, depending on baseline and gas price.

02Approach

Investment dimensioned to operating hours.

On projects with high operating hours (logistics, warehouses, multi-shift production) condensing technology recovers the investment fastest. For each case we prepare an annual savings calculation against the current installation and local gas price.

The system requires a condensate drain to sewage with appropriate mild-acid resistance. On retrofits we verify whether the existing flue is suitable for the lower flue-gas temperatures produced by condensing operation.

03Product families