Do radiant piping systems require bleed valves?

Radiant piping systems, which are commonly used for heating or cooling by circulating heated or chilled fluid through a network of pipes embedded in floors, walls, or ceilings, do not require bleed valves under typical operational circumstances. The purpose of bleed valves is to remove trapped air from a system, which can hinder the efficiency of heat transfer and potentially cause noise or uneven heating.

In radiant heating systems, the design often incorporates features that minimizes air entrapment, such as using closed-loop systems and ensuring proper system filling procedures. Additionally, the components in a well-designed radiant system, like manifolds equipped with manual or automatic air vents, typically allow for any small amounts of air to be purged efficiently without the need for separate bleed valves. Keeping the system properly pressurized and following correct installation practices further reduces the likelihood of air accumulation.

Therefore, while bleeding may be necessary in some heating applications, it is generally not a requirement specifically for radiant piping systems, making the answer correct that they do not require bleed valves.