Example Scenario
Supposing the householder runs the central heating system in the early morning, so that the house is warmed for breakfast time. All the time the boiler is running, the waste heat in the flue is being transferred to the water in the heat exchanger, which then passes to the storage tank. This water can reach between 40oC and 50oC.
The householder then runs the hot tap, whether for a wash or a shower. The hot water either runs directly from the storage tank, via a blender valve, to the tap, and the heat is thus supplied totally free of charge, or it is cycled through the boiler where the higher than normal inlet temperature is sensed, and only sufficient heat applied so as to bring the water up to the normal, pre-selected outlet temperature. So far less gas is used to supply this “piping hot” water. Hot water flows from the tap sooner than normal - less cold water is wasted waiting for the water to run hot - giving further savings.

Either way, the householder saves money, and Ravenheat estimates that over a year a typical gas bill will be cut by 5% against a Band A condensing boiler (over 40% saving by replacing non condensing appliances with a Ravenheat condensing boiler and ENERGYCATCHER©.

ENERGYCATCHER is simple to install, uses no electricity, has no running costs and requires no maintenance.