Posts Tagged ‘Periscope Ducting’

clay-v-iron

Cast Iron Air Bricks vs Clay Air Bricks

Cast Iron Air Bricks vs Clay Air Bricks  In the photograph above we’re comparing our GRID6 9×6 air brick with a similar sized clay air brick. If we take, for example, the corresponding 9×6 clay air brick in the photograph top right (middle of the 3 air bricks shown in buff) and compare the free air […]