![hvac - Is it safe to use Category 1 80,000BTU furnace with 2 inch PVC exhaust? - Home Improvement Stack Exchange hvac - Is it safe to use Category 1 80,000BTU furnace with 2 inch PVC exhaust? - Home Improvement Stack Exchange](https://i.stack.imgur.com/KgoPE.jpg)
hvac - Is it safe to use Category 1 80,000BTU furnace with 2 inch PVC exhaust? - Home Improvement Stack Exchange
![Does a furnace need a fresh outside intake vent ? I am in a newer home and it seems as though it uses the inside house air as an intake. Is that Does a furnace need a fresh outside intake vent ? I am in a newer home and it seems as though it uses the inside house air as an intake. Is that](https://preview.redd.it/4183z6mcxdh51.jpg?width=640&crop=smart&auto=webp&s=436162a64b5a46521fe93c6124ae2ae622025780)
Does a furnace need a fresh outside intake vent ? I am in a newer home and it seems as though it uses the inside house air as an intake. Is that
![Keep Your Furnace Air Intake and Exhaust Clear from Snow This Winter - A1 Air Conditioning & Heating Keep Your Furnace Air Intake and Exhaust Clear from Snow This Winter - A1 Air Conditioning & Heating](https://a1air.ca/wp-content/uploads/2019/03/Venting-Snow.jpg)
Keep Your Furnace Air Intake and Exhaust Clear from Snow This Winter - A1 Air Conditioning & Heating
![What is High-Efficiency Furnace Venting? What You Need to Know - Arlinghaus Plumbing, Heating & Air Conditioning What is High-Efficiency Furnace Venting? What You Need to Know - Arlinghaus Plumbing, Heating & Air Conditioning](https://www.arlinghausair.com/wp-content/uploads/2022/01/arlinghaus-furnace-venting-scaled.jpg)
What is High-Efficiency Furnace Venting? What You Need to Know - Arlinghaus Plumbing, Heating & Air Conditioning
![If I switch this furnace exhaust vent for b vent, how can I get it into the top of the furnace to connect to the blower? Or do I need a short If I switch this furnace exhaust vent for b vent, how can I get it into the top of the furnace to connect to the blower? Or do I need a short](https://i.redd.it/7njho57ianw71.jpg)
If I switch this furnace exhaust vent for b vent, how can I get it into the top of the furnace to connect to the blower? Or do I need a short
![High Efficiency Furnace venting through roof. Wouldn't water get into the intake pipe? : r/hvacadvice High Efficiency Furnace venting through roof. Wouldn't water get into the intake pipe? : r/hvacadvice](https://i.redd.it/high-efficiency-furnace-venting-through-roof-wouldnt-water-v0-krk39zcrdyy81.jpg?width=672&format=pjpg&auto=webp&s=36ac58f0166ad4741379f4fbf218f15306d68c0e)