Can I Use My Existing Venting for a Tankless Water Heater ?

In this informative video, we explore the topic of using existing venting with a tankless water heater. If you're thinking about upgrading to a tankless water heater or have already made the switch, you may be wondering whether your existing venting system is compatible.
Our expert host dives into the key considerations you need to keep in mind when it comes to venting for tankless water heaters. We'll take a closer look at the types of venting systems typically used with tankless water heaters, and whether your existing setup can be used.
We'll also discuss potential risks and concerns that can arise when using incompatible venting systems, and provide tips on how to ensure a safe and efficient installation.
If you're looking to upgrade to a tankless water heater or have already made the switch, this video is a must-watch to ensure you're optimizing your setup for maximum efficiency and safety. So hit the play button and join us as we explore the world of tankless water heater venting!

[@martinjr85]

Whole video for him to say "not recommended" at the very end in the last 5 seconds

[@michaelchen9951]

Thanks so much, sir. Helpful information!

[@don2deliver]

Your direct venting was a required concentric vent water Heater. Your concentric vent example was a heater with separate intake and exhaust and an option of running concentric venting.

[@The4Crawler]

While one can't use the existing venting for the tankless, it is possible to use the path and penetration(s) of the existing venting for the new venting. This was done with my tankless install to replace the old tank type heater. Pulled out the old venting and installed the new venting without having to make new holes in the roof or wall and not having to patch the old holes. That was a big time and cost savings and as mentioned in the video, it resulted in the shortest possible vent run.

[@dougs867]

see EZTR40LP
120000 BTU 6.6 gpm 120 Volts Noritz LP Residential Water Heater
Note It's only 120,000 BTU but the venting is interesting

[@The4Crawler]

@@dougs867 Yes, that flex vent kit they have is interesting. Saves removing the old venting, just run the flex vent up through the existing vent pipe.
In my case the existing vent was that nasty Transite pipe and I wanted to get rid of that.

[@Wood424]

My parents have an old gas water heater, vented to a brick chimney (it was bricked in but the top is open) can I use that with the proper pipe for exhaust and draw intake from the room (its a large basement). Thank you for the video!

[@djwashx]

Great explanation!!!!!!

[@allthingsplumbingheatingair]

Glad it was helpful!

[@autobotavengerfireballxl5339]

why cant I tie my water heater into the furnace intake and exhaust vent?

[@autobotavengerfireballxl5339]

I mean the one is for fresh air no harm no foul and the other is just for emissions a 2 inch pipe should be more than capable of pumping the co2 gas out the side of my house

[@Kenny4AG]

The answer is NO
There i saved you 4 minutes

[@andriytarnovetskyy4992]

Thank you, that's all I really needed to know.