Instant
hot water heater
How
tankless hot water heaters work
 The central component of an instant hot
water heater is a device called the heat exchanger.
It's the chamber in which cold water, directly
from the plumbing pipes, is heated virtually instantly and on demand.
When warm or hot water is desired for a shower or
from a kitchen faucet, a flow sensor indicates the incoming water
supply and
activates a computer within the tankless unit.
The computer in the tankless hot water heater then
calculates
the difference between the incoming cold water and the desired hot
water temperature.
Depending on this calculation, a specific amount
of natural gas, propane or electricity is then supplied to a gas
burner or an electric coil.
This gas burner (in natural gas
and propane models) or electric coil (in electric models) transfers
heat to the heat exchanger.
The heat exchanger, being the heart and soul of
any tankless hot water heater, then almost immediately heats up the
incoming cold water that travels through the copper pipes that are
wrapped around the heat exchanger.
Instant hot water
heaters have lower operating costs
As soon as the shower is over, or the hot water
tap is closed, the overwhelming majority of the natural gas,
propane or electricity flow to the
tankless hot water heater stop as well. The result is not just instant
warm and hot
water but also lower overall overall operating costs.
With this flash heat and technology an
instant water heater eliminates the unnecessary costs of
reheating stored
water for later use. This technology is how tankless units work
and it's what makes these energy efficient water heaters worth
considering.
More on tankless hot water heaters
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