DYNAMIC Boiler optimiser
WHAT IS A DBO?
The Dynamic Boiler Optimiser (DBO) is a unique patented and BRE certified technology that is installed between the thermostat and the burner valve. It alters the firing pattern of a domestic boiler creating fewer but slightly longer burn periods. The overall effect is to reduce the amount of time the boiler is burning.
Typically, a DBO will save in excess of 16% of fuel consumption.
HOW DOES A DBO WORK?
Fuel consumption is reduced by applying Isaac Newton’s Law of cooling. In layman terms heat gain is twice as fast as heat loss. Therefore, extending the cooling cycle of a boiler by 90% would drop the boiler temperature by around 3 degrees, which would then require a slightly longer burn cycle. This would be increased by around 10-20%.
The net result is that a heating and cooling cycle which would normally take 200 seconds, now takes 320 seconds. If you compare gas consumption over 24 hours, there is no loss in performance to the heating system (Newton’s Law of cooling shows us that) yet gas consumption is considerably reduced.
For example, 8 burns of 10 minutes in a 4-hour period will be typically reduced to 5 burns of 12.5 minutes, i.e. a 21% reduction.
The analogy is that of a car running a lot of short journeys compared with fewer longer journeys, which results in more efficient fuel consumption. The DBO responds to the needs of the property and there is no variation in internal temperature when a unit is fitted.
IS MY BOILER SUITABLE?
The DBO is designed to work with nearly all types of domestic gas, oil or dual fuel boilers.
COULD INSTALLING A DBO DAMAGE OR ADVERSELY AFFECT MY BOILER IN ANY WAY?
The DBO does not alter the way in which your boiler functions, therefore will not damage your boiler in any way, nor will it adversely affect the performance of the boiler. We have never had an issue with units installed in thousands of installations.
HOW MUCH MAINTENANCE DO THEY REQUIRE?
HOW CAN THE DBO PROVE ITS SAVINGS?
The DBO has a short term protocol for identifying the savings being made. The unit runs for 50 cycles measuring the cooling and burning phase for each cycle and takes the average for the 50. It then drops out of circuit and measures the average extension to the cooling times over the 50 cycles.
It can then calculate the difference in the percentage of time the boiler is burning in a cycle and from that determine the savings. It is a test designed to demonstrate the impact of the unit, which aims to extend the cooling curve by the order of 90%. This causes the boiler to cool by up to 3 Degrees C, such that when it refires it burns slightly longer around 10%.
In essence the boiler shuts down for longer without impacting on the delivery of hot water. In addition savings of 16% were identified by the Building Research Establishment certificate CFP 348 on an average winter day of 10 Degrees C. They further identified that at a temp of 0 Degrees C savings of the order of 10% were being made, a significant impact.