German condensing boiler Wolff or viessmann, which is more gas-saving?

Wolf's second-generation cast aluminum burner is also the same fire, which is repeated for three times and absorbs heat fully. The combustion efficiency can reach 1 10%, the market price is more than 40 thousand, and the carbon monoxide emission is 9 mg/kw/h.

Originated in Munich, Bavaria, Germany, the whole machine was imported, and the first batch of German condensing boilers were introduced in China.

It is still in normal use in Beijing. The largest wall-mounted stand-alone machine can achieve 100KW.

Viessmann used the first generation stainless steel burner, which cost more than 10,000 yuan. The combustion efficiency machine is printed with,

If I remember correctly, it seems that only 94-96% of them are made in Ahlendorf, East Germany, with factories in Beijing, China.

If you want to know more, you can directly visit two German companies, official website, to see the thermal efficiency.