meet Brian and Joel with A-1 to go over existing venting at pool house. Joels number is ###-####. he said about noon but you should call first. - need to remove blocking from combustion air openings, A-1 is going to replace existing single wall vent connector system with manufactured fittings, inlarge lower combustion air opening into furance room, and add electric heaters to eleminate the freezing of the pipes.