- Outdoor Regular (heat-only) boiler
- Heat output settable between 15 and 21kW (50,000 to 70,000btu)
- Factory set at 21kW (70,000btu)
- Seasonal efficiency: 93.0%
- Can be converted to a sealed system operation
- Supplied with multi-directional low-level flue
- Wireless programmer compatible
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- Outdoor Regular (heat-only) boiler
- Heat output settable between 15 and 26kW (50,000 to 90,000btu)
- Factory set at 23kW (78,000btu)
- Seasonal efficiency: 95.0%
- Can be converted to a sealed system operation
- Supplied with multi-directional low-level flue
- Wireless programmer compatible
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- Outdoor Regular (heat-only) boiler
- Heat output settable between 26 and 36kW (90,000 to 123,000btu)
- Factory set at 31.5kW (107,000btu)
- Seasonal efficiency: 97.0%
- Can be converted to a sealed system operation
- Supplied with multi-directional low-level flue
- Wireless programmer compatible
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- Outdoor Regular (heat-only) boiler
- Heat output settable between 36 and 46kW (123,000 to 157,000btu)
- Factory set at 41.5kW (142,000btu)
- Seasonal efficiency: 92.6%
- Can be converted to a sealed system operation
- Supplied with multi-directional low-level flue
- Wireless programmer compatible
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