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Today's building codes state spaces using furnaces have to have opportinity for creating combustion air because it used. Newer homes have ducting installed, during construction, which brings outdoors externally with an area nearby the furnace. This ducting, usually called make-up air duct, or combustion make-up air, is sized in accordance with the capacity from the furnace. Friends and colleagues gathered to applaud worthy winners across seven categories – and recognise the creativity and dedication which underpin the whole sector’s contribution to the economy, to society and to customers, staff and stakeholders. 5. The power of their language