Direct Open Vented Hot Water Storage Systems

What are direct open vented hot water storage systems named after?

• The type of heating systems they are compatible with

• The type of hot water storage cylinders they use

• The type of electric immersion heaters they use

• The type of boilers they are connected to

Which of the following can be used to heat a direct-type hot water storage cylinder in a direct open vented hot water storage system?

• A large central heating boiler

• A small hot water only boiler

• A gas-powered central heating system

• A solar heating panel

What is another method of heating the water in a direct-type hot water storage cylinder besides using a small hot water only boiler?

• Using a heat pump

• Using a wood-fired boiler

• Using an electric immersion heater

• Using a geothermal heating system

Is a direct-type hot water storage cylinder suitable for use with heating systems?

• Yes, it is suitable for all types of heating systems

• Yes, but only with electric heating systems

• No, it does not contain a heat exchanger

• No, unless it is retrofitted with additional components

What does direct water heating in an open vented hot water storage system mean?

• It requires a lot of structural support

• It is associated with a high risk of water hammer

• It results in quicker hot water heating times

• It can be used with central heating systems

What does the double feed indirect hot water storage cylinder contain that acts as a heat exchanger?

• A copper or stainless steel rod

• A copper or stainless steel coil

• A plastic or aluminum coil

• A glass or ceramic coil

What is the primary function of the coil in the hot water storage system?

• To act as a secondary heat exchanger

• To store additional water

• To provide structural support to the cylinder

• To act as the primary heat exchanger for the hot water supply

Which type of heating systems is the hot water storage cylinder suitable for?

• Central heating systems

• Solar heating systems

• Electric-only heating systems

• Gas-only heating systems

What is the size of the vent from the primary hot water system connected to the boiler in the indirect system with open vent gravity primary circulation?

• 15mm

• 22mm or 28mm

• 150 litre

• 450mm

What type of valve is fitted to the feed and expansion cistern in both the indirect system with open vent gravity primary circulation and the sealed indirect system with pumped primary circulation?

• Gate valve

• Ball type service valve

• Float operated valve

• Expansion vessel