cleaning the solid fuel boiler from remains firewood and coal with open damper heating efficiency |
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| navigate by keyword : cleaning fuel ash boiler burn coal damper dark dirty domestic door economy energy fireplace grille heat home industrial opening recycling residue service solid solidfuel stokehold system |
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| Cleaning the solid fuel boiler from the remains of firewood and coal. Boiler with an open damper. Heating efficiency in the house. |
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