Choosing your Dualstream system

Choosing your Dualstream system

To obtain the very best performance from your Dualstream system the accumulator must be sized correctly, as it is the driving force supplying hot and cold similtaneous demand to the building.

The accumulator will hold approximately half its total volume and we would recommend a recovery time of 15 minutes, this will depend on the flow rate from the main supply, which can vary.

When choosing your Dualstream, consider the following:

Mains flow rate and static pressure
House type and number of occupants
Typical daily water usage
Number of bathrooms/ensuite/showers
Other water usage hot or cold

House 1

Ref no	Guide to hot water demand	Direct model	Indirect model
1	1 bed, 2 people, bath + shower, kitchen	TDD/C 80/125	TDI/C 80/125
1	2 bed, 3 people, bath + shower, kitchen	TDD 200 or 125/150	TDI 200-125/150
2	3 bed, 4 people, bath + shower, kitchen	TDD 200 or 300/150/210	TDI 200 or 300-150/210
2	4 bed, 5 people, 2 baths + shower, kitchen	TDD 200 or 300/210 or 300	TDI 200 or 300/210 or 300
3	Larger homes	TDD 300 or 500/300 or 500	TDI 300 or 500/300 or 500
	Small commercial	TDD 500/500	TDI 500/500

For example
Model number TDI 500/300 has a 500 ltr accumulator with a 300 ltr indirect cylinder. Two or more models can be installed in parallel for greater volume demand.
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