Q:  We are looking to purchase one of your products and would like to know what forms of payment you accept and what the normal lead times are from order to delivery?
 
  A:  We accept all types of payment including cash, cheque, credit or debit card and for regular customers you could try and apply for a credit account. The standard lead time on vented domestic copper cylinders is 7 to 10 working days and on advanced products 10 to 12 working days for delivery on UK mainland. Lead times will vary at holiday periods.
 
Q: We have run out of literature for your products at some of our branches, how do we go about ordering some more?
 
  A: Send an e-mail to enquiries@telford-group.com, call 01952 257963 or fax 01 952 253452 Customer Services or write to us at Customer Services, Telford Copper Cylinders Ltd., Unit 22, Furrows Business Park, Haygate Road, Wellington, Shropshire, TF1 2FE.
 
Q: What is the difference between a Tornado and a Tempest?
 
  A: The Tornado and Tempest cylinders have the same performance and efficiency characteristics and share the same stainless steel cylinder body. The Tornado is supplied with the expansion vessel fitted and the whole assembly encased in a white mild steel outer. The Tempest is supplied with the expansion vessel loose for on-site fitting and the main unit is shorter than the equivalent capacity Tornado.
 
Q: What grade of cylinder do I need?
 
  A: There are three ‘Grades’ of vented cylinder G1, G2, G3 all are built to the same manufacturing standard, the principle difference between the three grades is the gauge of the copper sheet used. To determine the grade required measure the distance from the waterline in the header (or feed and expansion) tank serving the cylinder and the base of the cylinder. This measurement is known as the ‘working head’ and determines the grade of cylinder to be used.

Grade 1 for a working head of up to 25 metres (2.5bar pressure)
Grade 2 for a working head of up to 15 metres (1.5 bar pressure)
Grade 3 for a working head of up to 10 metres (1.0 bar pressure)
 
Q: What is the difference between vented and unvented cylinders?
 
  A: A vented cylinder is serviced from a feed and expansion tank typically sited in the roof space above the cylinder. As water is drawn from the cylinder it is replaced by water from the F&E tank. When the water in the cylinder is heated it expands and this expansion is taken up and into the F&E tank.

An unvented cylinder is typically fed from the cold mains. On unvented cylinders the dynamics of expansion and contraction of the water as it heats and cools are controlled by an expansion vessel fitted to the cylinder. Unvented cylinders are designed to work with hot water under pressure and are subject to Building Regulations governing the installation and maintenance of the cylinder.
 
Q: What is the difference between a thermal store and other cylinders?
 
  A: The traditional hot water cylinder, that most of us are familiar with, uses an energy source to heat the water in the cylinder which is drawn off to feed the hot water taps and appliances. In a Thermal store the body of water in the cylinder is heated in a similar fashion but instead of the store water being used, cold water from the mains supply is passed through a coil in the cylinder. Heat from the store is transferred to the water as passes through the coil. The water from the coil is then cooled to a safe useable temperature by blending with cold water before being supplied to the hot water taps and appliances in the system.

The principle advantage of a Thermal store is the provision of hot water at mains pressure without using a mains pressure cylinder to a maximum of 3 bar.

Thermal stores are increasingly the cylinder of choice in flats and small apartments.