Solar water and space heating systems

For a direct-circulation systems

• water from solar collector will mix with water supply

• water from solar collector will not mix with water supply

For indirect-circulation system

• the system is an open system

• the system is a closed system

Indirect circulation systems

• Require a heat exchanger

• Does not require a heat exchanger

Integral collector storage systems

• has circulation pumps and an external power supply

• has no circulation pumps and external power supply

In Thermosyphon system

• Hot water rises into the tank above

• Hot water flow into the tank below

A backup heating system is called

• Auxiliary heater

• Heat exchanger

• Alexander

The purpose of the expansion tank is

• to get more hot water

• to regulate pressure

For a passive space heating system, the area to trap heat is designed to be facing

• north

• south

• east

• west