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Aquarea air / water heat pump – design handbook 07 / 2014
Project Design
Sizing the Hot Water Cylinder
Domestic hot water services design should be based on an accurate
assessment of the number and types of points of use and anticipated
consumption within the property, making appropriate adjustments for
the intended domestic hot water storage temperature and domestic hot
water cylinder recovery rate.
When sizing the hot water cylinder, please use MCS guidelines in
MIS3005 and also refer to BS EN 806:1-5 AND BS EN 8558.
When Aquarea HP cylinder is connected to both heat pump and solar
thermal systems, then during the winter period the solar contribution will
be negligible and the heat pump will only heat about 65 % of the cylinder
volume.
This should be taken into account when selecting the model.
Aquarea HP Cylinder Selection Guide
Dwelling type
Suggested model
Number
of bed-
rooms
Number of
bathrooms and
shower rooms
Without solar heating
system
1
With solar heating
system
2
1 – 3
1 bathroom
PAW-TE18C2E3STD-UK PAW-TE18C2E3STD-UK
(F
A
= 50 m²)
2 – 3
1 ba
1 shower room
PAW-TE18C2E3STD-UK
PAW-TE30C2E3STD-UK
(F
A
= 65 m²)
2 – 3
1 ba
2 shower rooms
PAW-TE18C2E3STD-UK
PAW-TE30C2E3STD-UK
(F
A
= 85 m²)
2 – 4
2 bat
1 shower room
PAW-TE30C2E3STD-UK
PAW-TE30C2E3STD-UK
(F
A
= 110 m²)
2 – 4
2 bat
2 shower rooms
PAW-TE30C2E3STD-UK
PAW-TE40C2E3STD-UK
(F
A
= 150 m²)
3 – 5
2 bat
2 shower rooms
PAW-TE30C2E3STD-UK
–
4 – 5
2 bat
3 shower rooms
PAW-TE40C2E3STD-UK
–
1
Both top and bottom heat exchangers connected to heat pump circuit
2
Top heat exchanger connected to heat pump circuit and bottom heat exchanger
connected to solar circuit.
F
A
= Maximum floor area of the dwelling for compliance with the Building Regulations
5.4 Sizing the Hot Water Cylinder
