Running an fan through the middle to blow air up the pipes would help it radiate out. Bend the pipes around a 55 gallon barrel and make a rocket style insulation around it with sand and plaster. Place some sort of central blower to control speed of air
A colored outdoor bench for your garden or your terrace made out of concrete blocks and wooden slats. The concrete blocks are joined together with a silicone adhesive base and some wooden slats were added for the seat.