Another important detail is the construction: a closed combustion chamber is required, which allows the accumulation of combustion residues (ashes). Sufficient space is also needed to allow access to the burner and exchanger so they can be cleaned.
Another important detail is the construction: a closed combustion chamber is required, which allows the accumulation of combustion residues (ashes). Sufficient space is also needed to allow access to the burner and exchanger so they can be cleaned.