A combustion system essentially comprising: - at least one body; - at least one surface-type burner which is located on the lower part of the body and configured to burn a rich fuel air mixture; - at least one electrode configured to ignite the rich fuel air mixture; - at least one fuel valve configured to give the natural gas required for the surface-type burner; - at least one compressor (or fan) configured to provide the air required for the surface-type burner; - at least one air valve which is located downstream of the compressor; - at least one primary heat exchanger where the exhaust gases, which are generated as a result of the combustion occurring In the surface-type burner, enter and heat water passing through; - at least one pump to pressurize the water passing through the primary heat exchanger: - at least one heat exchanger valve which is located in front of the primary heat exchanger and at least one flow meter (rotameter, etc.) configured to measure the water flow; - at least one tubular secondary heat exchanger which is positioned on the upper part of the primary heat exchanger, the combustion system being configured to have secondary air passing through the jacket part of the tubular secondary heat exchanger, thereby heating the secondary air pumped for combustion through the tubular secondary heat exchanger; - at least one secondary heat exchanger air valve configured to control the secondary air passing through the secondary heat exchanger: - at least one gas distributor plate which is located on the upper part of the secondary heat exchanger and configured to generate a poor gas mixture by mixing the exhaust gas and the secondary air exiting the secondary heat exchanger - at least one moisture trap where the poor gas mixture exiting the gas distributor plate enters; - at least one catalytic burner which is located on the upper part of the moisture trap and wherein flameless combustion occurs; - at least one tertiary heat exchanger where the gas leaving the catalytic burner is released to the atmosphere by passing through the jacket part and the water exiting the primary heat exchanger passes through and heated for the last time before leaving the system; and - at least one gas outlet exhaust pipe where the gas leaves the body. - at least one body; - at least one surface-type burner which is located on the lower part of the body and configured to burn a rich fuel air mixture; - at least one electrode configured to ignite the rich fuel air mixture; - at least one fuel valve configured to give the natural gas required for the surface-type burner; - at least one compressor (or fan) configured to provide the air required for the surface-type burner; - at least one air valve which is located downstream of the compressor; - at least one primary heat exchanger where the exhaust gases, which are generated as a result of the combustion occurring In the surface-type burner, enter and heat water passing through; - at least one pump to pressurize the water passing through the primary heat exchanger: - at least one heat exchanger valve which is located in front of the primary heat exchanger and at least one flow meter (rotameter, etc.) configured to measure the water flow; - at least one tubular secondary heat exchanger which is positioned on the upper part of the primary heat exchanger, the combustion system being configured to have secondary air passing through the jacket part of the tubular secondary heat exchanger, thereby heating the secondary air pumped for combustion through the tubular secondary heat exchanger; - at least one secondary heat exchanger air valve configured to control the secondary air passing through the secondary heat exchanger: - at least one gas distributor plate which is located on the upper part of the secondary heat exchanger and configured to generate a poor gas mixture by mixing the exhaust gas and the secondary air exiting the secondary heat exchanger - at least one moisture trap where the poor gas mixture exiting the gas distributor plate enters; - at least one catalytic burner which is located on the upper part of the moisture trap and wherein flameless combustion occurs; - at least one tertiary heat exchanger where the gas leaving the catalytic burner is released to the atmosphere by passing through the jacket part and the water exiting the primary heat exchanger passes through and heated for the last time before leaving the system; and - at least one gas outlet exhaust pipe where the gas leaves the body.