DescriptionFor floor-mounted and wall-mounted gas boilers, an additional installation of single-pipe Elbow S effectively use such chimneys. NAVIEN Knee S because the air to maintain the combustion process will enter the boiler already warmed up by the outgoing gases. When installing such a chimney, additional pipes may be needed for elongation. For more information about the product, please check with the seller by contacting him by phone 99871 200 - 18 - 00more hide
