Servicing

All boilers use standard pressure jet burners and are easy to service. The heat exchanger surfaces tend to self clean as a consequence of the continual washing effect of the condensate and the lack of deposition resulting from the enhanced combustion efficiency.

Flues

As mentioned above, all flues can be constructed from UPVC plastic. This reduces installation cost and enables flues to be constructed in a variety of conventional or balanced flue versions. 82mm diameter is usual on the 40kW units and 110mm diameter on the 80kW units.

Compact

The boilers are very compact in occupying a footprint of only 600mm x 645mm

Boiler Dimensions

	40kW	80kW
Width:	600mm	600mm
Depth:	645mm	645mm
Height:	875mm	1545mm
Flue Diameter:	82mm	110mm
Tappings 4 off:	1"BSPF	2"BSPF
Condensate Drain:	3/4"	3/4"
Fuel Type:	Kerosene	Kerosene
Oil Supply:	1/4" BSPF	1/4" BSPF
Electrical:	240V. 50Hz	240V. 50Hz
Max pressure:	3 bar	3 bar

Achievable Savings

Based upon practical field trials we have established the saving achievable by utilising the technology described above.

This is also vindicated by independent studies, carried out by BRESCU Best Practice Programme publications.
Case Study 84 Domestic oil fired condencing boilers(+) and others carried out on the predecessors of the above technology.

(+) Copies can be supplied by us, if required

For an average four bedroom house, total heat load of 30kW, located in the Midland Region of the UK, the annual fuel consumption figures would be as follows:

Standard boiler.
S plan system with thermostatic control of hot water and heating.
Annual fuel consumption: 6,840 litres Cost: £2,325.60

Simple Condensing boiler (Sedbuk A) with control system as above.
Annual fuel consumption: 6,012 litres Cost: £2,044.08

HCC Thermotronic T3 DC
Annual fuel consumption: 4,788 litres Cost: £1,627.92

The above calculations are based upon heating for 14 hours per day in a season plus domestic hot water all year round.
A current oil cost of 34p/l is assumed.

If we consider that the additional capital cost of the HCC T3 DC boiler is of the order of £1500 dearer than the cheapest simple condensing boiler, then the additional fuel saving of £416.16, in this case, represents an effective interest on the additional capital invested of some 27.7% APR.

This clearly justifies the additional capital cost and also, being all stainless steel, the HCC T3 DC boiler has a life span of over three times that of the standard version. As fuel costs rise so does the effective interest rate.

The above calculations can be linearly extrapolated to larger or smaller heating loads by multiplication by the factor "Actual load" in kW/30

So, for example, a 20kW load would still yield 18.46% APR; a level still far above the current borrowing rate.

For different regions of the UK, the additional multiplying factor should be used:
Northern 1.108
Southern 0.912