Norwich Case study CUSTOMER: Malcolm Robinson LOCATION: Norwich, Norfolk HEATING SYSTEM: Open Vent Glow Worm 85-100 Boiler This is a spacious four bedroom detached house, which was built in 1979. The owner installed a Vortex in November 2009 and compared his energy bills from winter 2008-2009 (pre Vortex) against winter 2009-2010 (with Vortex). The heating for winter 09-10 was running for about 50 minutes extra per day in comparison to winter 08-09 but despite this money was still saved on heating bills! The client has advised that since the installation of Vortex gas use has reduced by an average of 2.66 Units (29.0383 KW) per day and electricity use has also reduced. The electricity use reduction can be attributed to the fact that the heating pump is running at a slowe

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