New boilers more than halve fuel costs
Huge reductions in gas consumption have been achieved by English Partnerships, now part of the Homes & Communities Agency, following the replacement of the heating system with a high-efficiency multi-boiler cascade system from Buderus. The new installation is a cascade system of four Buderus GB162 100 kW boilers.
A review of fuel consumption was carried out when the boilers had been in place for 12 months. For the first 30 weeks of the year, gas consumption was halved compared with the same period for the previous year.
Even more impressive were the three months from April to June, with gas consumption reduced by 70%. This high saving came from the ability of just one of the four boilers being used at maximum turndown (19% of full load) at times of low demand. That level of modulation is unlikely to be achieved using a single 400 kW boiler.
Peter Pollard of MBE Consultants, which advised on the most efficient replacement on the old boilers, says, ‘The installation and operation have exceeded expectations in both efficiency and actual fuel savings, accrued purely through the new system. We also changed over to an energy-management style system, which was instrumental in further increasing fuel savings.’
