Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to eight tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor, and longer vent lengths than ever possible with single-unit tankless water heater venting.

Exactly what I needed for the job and great price too. John. Mon Dec 08 2025

I couldn’t find the product on any other website. I found the product on this website. It was exactly what I needed for the right price.. Anonymous. Sun Apr 28 2024

Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to 8 tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor, and longer vent lengths than ever possible with single-unit tankless water heater venting.

Great product that I could not find locally. Chris. Portland, OR. Fri Jun 30 2023

Precisely engineered accessories can add even more reliability, convenience and flexibility to Rinnai Tankless Water Heaters. With Rinnai Common Venting, up to 8 tankless water heater units share the same vent system. This allows for significantly fewer wall or roof cuts, less labor and longer vent lengths than ever possible with single-unit tankless water heater venting.

If necessary, extension kits are available to extend the exhaust line and air intake hose between the exhaust manifold and the appliance.

Rinnai direct vent wall furnaces must vent the flue gases to the outdoors. The flue manifold kit helps vent these gases through an exterior wall between 9-1/2 to 15-3/4 inches thick.

I got these on a whim, to try them out and very much enjoyed them. My supply is almost out and I will purchase them again. I am healthy and feel good, and it may or may not be because of these capsules.. Marcy S.. Wed Mar 31 2021