| Single-tank
Closed Loop System
- Uses less space
- Has lower maintenance cost
- Is least expensive of three systems
Auxiliary boost = electricity
Components include:
- Single coil solar water tank
- Solar collectors
- Solar control units.
Dual-tank Closed Loop System
- Has lower maintenance cost than boiler
- Is less expensive than the boiler system
Auxiliary boost = gas
Components include:
- Single coil storage tank
- Gas water heater
- Solar Collectors
- Solar control unit
Boiler Closed Loop System
Boiler system
- Has high efficiency
Auxiliary boost = boiler
Components include:
- Boiler
- Double coil storage tank
- Solar Collectors
- Solar control unit
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