Rinnai scores tops with Welsh rugby team
Welsh rugby team Maesteg RFC has converted [unintended pun] its hot water system from an old storage system to a system using Rinnai Infinity heavy-duty condensing units. The work was carried by CST Renewables.
Mark Hiller-Rees of CST, a supporter and current player for the 130-year-old club, explains, ‘The project entailed replacing the ancient stored-hot-water system serving the showers, changing rooms and toilets. I originally ordered two Infinity HDC 1500 units, but Rinnai’s low-Nox HDC 1600 heater with 107% efficiency had just become available, so we put in two of them — plus a 300 l buffer vessel.’
He suspects that the previous boiler was only about 80% efficient, so gas consumption could be halved. He adds, ‘The system now runs on boosted pressure (cold-water boosters), controlled by a pressure-reducing valve set at an operating pressure of 1 bar.
‘The mains water feeds the existing cold outlets and the pressure-boosting units and the cold tank, which between them store 600 l of water.
‘The hot water is heated by the two Rinnai units with 300 l of stored hot water by way of a direct heated buffer vessel protected by two Scale Master units.
The new system can deliver hot water in 10 to 15 minutes from cold, compared to an hour for the old system.