Maxistore Direct 900 x 450mm - 258250 Maxistore was developed for use on an open-vented system in electric only applications. The cylinders carry full Economy 7 accreditation and are manufactured to BS1566:2002 (Part L).To ensure maximum efficiency the cylinder is foamed twice, which reduces the heat-loss values. Two side entry immersion heater connections are fitted as standard to maximise the use of Economy tariff electricity. Later versions of the Maxistore range incorporated a combination style variant, to remove the need for a feed tank in the roof space and ease installation. Dimensions: 900 x 450 (36' x 18') Technical Info