Which type of gas vent is preferred for high-efficiency appliances?

For high-efficiency appliances, the most suitable type of gas vent is the Type B-W vent. This is because Type B-W vents are designed specifically to handle the lower exhaust gas temperatures produced by high-efficiency appliances, which often utilize condensing technologies. These appliances generate more moisture in their exhaust, and the Type B-W vent is constructed to cope with this condensation safely.

The construction of Type B-W vents includes materials that help to resist corrosion caused by the acidic moisture, ensuring that the vent system remains safe and effective over time. Additionally, these vents are designed for direct venting applications, which helps maintain efficiency by drawing air from outside for combustion and venting exhaust outside without using indoor air.

In summary, the choice of a Type B-W gas vent is aligned with the specific needs of high-efficiency appliances, supporting their operational requirements and enhancing safety while preventing damage from corrosive byproducts.