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If your boiler is a worcester bosch 25si or baxi duo

If your boiler is a worcester bosch 25si or baxi duo tec 40he the link below may also be of help. High-efficiency sealed-combustion units generally produce an acidic exhaust gas that is not suitable for old, unlined chimneys, so the exhaust gas should either be vented through a new duct or the chimney should be lined to accommodate the acidic gas (see the section on maintaining proper ventilation.

Added: 2020-05-08 | Category: one
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