The Flue Stretcher raises flues to a whole new level! By increasing the effective height of the flue, the Flue Stretcher solves two problems: 1) Reduce negative house pressures. Negative house pressures can pull the smoke from one flue down another flue right beside it. Adding the Flue Stretcher to the upstairs flue distances its smoke from the downward pull of the downstairs flue. 2) Increase draft, By putting the flue opening above roofs and other nearby structures you improve draft and reduce downdrafts. Flue Stretches come in stainless steel and copper, in 1' and 2' heights. Mesh is 3/4". The Flue Stretcher easily tightens with screws to the flue tile on all four sides of the base for extra security. Load tests simulating side wind and updraft conditions have demonstrated the Flue Stretcher mounting system holds tight under several hundred pounds of force.