Trapped air between glass or mineral wool fibres reduces heat loss by conduction and convection. Walls 35 Cavity wall insulation fills the cavity between the outside walls with mineral wool ...

Convection ovens have a similar principle, where there is a fan in the oven that circulates the heat, albeit at a less ...

Eventually, the oven cavity warms up as heat from that source gets trapped inside it. Convection ovens complement that one ...