| The traditional boiler works very much like a | | | | the term tankless. There is no water to be kept |
| storage tank water heater. The boiler stores | | | | hot at all times. The water is heated as needed |
| some amount of water in its tank that it | | | | "on the fly". Water is fed through a super efficient |
| continuously heats. The floor heating system is | | | | heat exchanger and heated. The water |
| triggered through activation of water circulating | | | | temperature is heated to the selected |
| pumps. The pump circulates the hot water from | | | | temperature setting precisely by adjusting the gas |
| the boiler tank through the floor pipes which in | | | | burner's flame accordingly. Water temperature |
| turn radiate the heat to the surrounding. The | | | | sensors monitor the water temperature and the |
| heated water circulates through the pipes in a | | | | tankless water heater's computer modulates the |
| closed loop and it is heated again by the boiler. | | | | burner. This means that the water is never over |
| The boiler itself has a low efficiency to begin with | | | | heated or under heated. This means that |
| and it is lowered over time by build ups in the its | | | | regardless of the heat dissipating rate of the pipes |
| tank. It is also not designed to heat the water in | | | | the water is heated to the set temperature |
| the tank rapidly. The rate the heated water | | | | instantly due to the ability of the tankless water |
| dissipates its heat through the pipes to the | | | | heater to vary its heating flame and power. The |
| surrounding and the ability of the boiler to reheat | | | | result is a very responsive system that can |
| the cooled down water again is most the time | | | | quickly replenish the lost heat in the pipes and |
| not the same. Often the heat is much faster | | | | therefore quickly heat the floor in case of floor |
| dissipated than it is reheated. This has the effect | | | | heating application. |
| that the cooled water is continuously circulated | | | | The traditional tank boiler is not able to do this |
| through the floor heating pipes. The result is that | | | | because it cannot vary its flame intensity. A |
| the heating system degrades more and more | | | | properly designed and installed system provides |
| over time and it takes much longer to heat the | | | | then comfortable and efficient floor heating |
| surrounding. This degraded responsiveness not | | | | regulated by a standard thermostat inside the |
| only lowers the comfort level but it also wastes | | | | home. Besides providing fast heating response the |
| more and more energy over time. | | | | hydronic system enables large continued energy |
| Now how is a tankless water heater better for | | | | savings for years lowering significantly the |
| radiant heating? Well, let's see first how a tankless | | | | operating cost of floor heating. |
| water heater functions. It has no tank and hence | | | | |