OSO HOTWATER | Products | OSO Dualstream: Sizing Chart

OSO DUALSTREAM SERIES

Sizing Chart

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OSO Dualstream water heater

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Sizing chart for the OSO Dualstream range of water heaters
The information below is a guide only. Dualstream packages should be sized after a survey of the property and measurement of incoming water main performance.

Dualstream size

Direct

Indirect

Bedsit

ODD 120/80

ODI 120/80

1 bed, 2 people, bath + shower

ODD 150/200 or 200/200

ODI 150/200

2 bed, 3 people, bath + shower

ODD 200/240 or 250/240

ODI 150/200 or 200/200

3 bed, 4 people, bath + shower

ODD 250/240 or 300/300

ODI 200/200 or 250/240

4 bed, 5 people, 2 baths + shower

ODD 300/300 or 380/300

ODI 250/240 or 300/240

Larger home requiring higher storage

ODD 380/500 or 2 x 380/500

ODI 380/500 or 2 x 380/500

The installation of any unvented hot water storage system must comply with the current building regulations and approved document G3. The system must also be installed in accordance with the water regulations giving due care and attention to the design requirements of BS6700:2006 and BS EN 806-1:2000. Consideration should also be given to whether a direct cylinder is connected to an off-peak tariff, if so, the larger of the two capacities should be considered.