If you’re thinking of installing a high-efficiency furnace in your home, be aware of the importance of high-efficiency venting. As there are several important aspects of high-efficiency venting, which require special venting and condensate drainage requirements. Most specifically, sidewall venting, and the use of PVC pipes. As proper sidewall venting requires installing separate vent pipes horizontally so that they went to outdoors through a wall of your home. Additionally, these ventilation pipes should be isolated from the combustion chamber and sealed airtight to eliminate any possibility of combustion gas leakage. Moreover, these vents should be constructed so that any condensate in the pipes is able to drain backward without freezing and drain directly into the floor drain or catch basin.