Selection Guide

Selection Guide

Choosing the right cylinder for your Home.

Domestic

Commercial

Hot Water Demand Bedrooms Indirect Direct
1 Standard Bath

or Shower
Bedsit / 1
2 – 3
3 – 4
60/90
120
150
150
180
210
1 Standard Bath 2 – 3
3 – 4
120
150
180
210
1 Standard Bath
and En-Suite
2 – 3
3 – 4
4 – 5
150
150
180
210
210
250
2 Standard Baths 2 – 3
3 – 4
4 – 5
180
180
210
210
210
250
3 Bathrooms 3 – 4
4 – 5
5 – 6
250
250
300
300
300
300

Actual usage calculations should be used for cylinder sizing, details above for guidance only. Please contact ThermaQ for technical support.

Hot Water Demand Indirect
Domestic
Direct
Calorifier
Large House – 6 Bed / 4 Bathrooms 2 x 210 1 x 450
Hotel/Hostel – 8 Bed / 4 Bathrooms 2 x 300 1 x 600
Hotel/Hostel – 8 Bed / 8 Bathrooms 3 x 210 2 x 350
Sports Club (25 people / 4 showers) 2 x 300 1 x 600
Leisure Centre (25 people / 6 showers) 3 x 210 2 x 350
Shared Accommodation
(25 people / 3 Bathrooms)
3 x 300 2 x 450
Shared Accommodation
(60 Beds/10 Bathrooms)
5 x 300 3 x 500

We recommend the use of ThermaQ calorifiers for large domestic or commercial applications, however when space is of a premium it is possible to connect smaller cylinders in series or parallel to achieve the quantity and flow required.

Using ThermaQ Evocyl units in Series

A popular option instead of having one large cylinder is to have two small cylinders installed, as a possible solution to limited space in a cupboard.

The method of installing cylinders in series is so that the cold mains feeds the first cylinder, and the hot draw off from the first cylinder provides the feed for the second tank. The second tanks hot draw off then provides the hot supply for the property.

The supplied combination valve will be installed on the mains inlet to the first cylinder, and this is also where the expansion vessel for both cylinders should be connected.

Using ThermaQ Evocyl units in Parallel

For situations when very high flow rates or larger volumes of hot water storage are needed, units of two or more can be linked in parallel.

When connecting two units in parallel, individual cold feeds are taken to each cylinder and then hot draw offs are connected together. Subject to the size of the incoming cold mains the flow rate available effectively doubles.

The need for this piping situation will arise according to the demand for hot water which will vary considerably between types of buildings and activities taking place there.

It is imperative that cylinders combined in parallel are of equal capacity/size.