Did venturi tees on baseboards work well? - GreenBuildingAdvisor
Summary
This article discusses the effectiveness of venturi tees in hydronic baseboard heating systems, particularly in a single-story home with an older boiler, and explores potential alternatives for improving heating efficiency.
Why It Matters
Understanding the performance of venturi tees in hydronic heating systems is crucial for homeowners and builders aiming to optimize heating efficiency, especially in colder climates. This discussion can inform decisions on heating system modifications and upgrades.
Key Takeaways
- Venturi tees are used in hydronic heating systems to manage water flow to baseboards.
- Heating efficiency can be affected by the design and configuration of the heating system.
- Homeowners may need to consider alternatives like Pex loops for better temperature regulation.
- Regular maintenance, including checking for air trapped in the system, is essential for optimal performance.
- Understanding local climate impacts on heating systems can guide better design choices.
Did venturi tees on baseboards work well? AD_in_AK | Posted in General Questions on February 28, 2026 12:09pm A friend has a single-story house in climate zone 7 with an older, non-condensing natural gas boiler. The home is heated with hydronic baseboards on a single zone. There is a single 1-inch main loop running around the crawlspace that serves roughly eight baseboard units. Each baseboard branches off the main using venturi (diverter) tees—mostly 1″ × 1″ × 1/2″, with a few that may be 1″ × 1″ × 3/4″. The issue is the hours it takes to bring the house up to temp on a negative or single digit Fahrenheit day if it is set back during the workday. I have not yet measured the temperature difference on the supply/return. However, I do believe the boiler to be adequately sized to keep up with the load. Did these diverter tees end up working well? I have never seen them before. Considering axing the diverter tees and running a Pex loop around the crawlspace with each baseboard plumbed in series.Any insight would be greatly appreciated Edit: I have opened the coin valve on each baseboard to ensure there is no air trapped. The zone valve is brand new. Answer GBA Detail Library A collection of one thousand construction details organized by climate and house part Search and download construction details Join the leading community of building science experts Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports fro...
