![]() It is most important that the cap is opened for the duration of the system’s operation.ĭetermine how much antifreeze your system requires by adding the total amount of fluid in the tubing (2.7 gallons per 100 ft. Pressure testing the system with air requires that cap to be closed so that it doesn’t release air ,…as that is it’s purpose. When filling the system with liquid, the air eliminator’s cap can be either in the open or closed position. The cap on the air eliminator is closed when it is tightened (clockwise) and opened when the cap is backed off (counterclockwise) a few turns, so that daylight is visible through the slit in the cap,…The air eliminator cap may be removed if you wish, but is not necessary. We recommend Propylene Glycol (not automotive, Ethylene Glycol) antifreeze. Follow this link, for information on filling and purging your Closed Radiant heating system. Air is the WORST thing that can happen to any (Hydronic) Radiant heating system. ![]() If pressure is dropping below the 15 psi, it is an indication of air still trapped in your system,…. When a heated system’s pressure is near 0,… and then cools,… it will create a NEGATIVE pressure… Thus creating a VACUUM, this will suck air into the system! The Closed system expansion tank is pre-charged and should not need any pressure. We recommend that you maintain at least 15 psi when the system is cold. When the Radiant heating system heats up, the pressure will increase, but when it cools, it will drop in pressure…. ![]() Two low or moderately efficient water heaters are much more costly to run than one high-efficiency unit.Īs air leaves a system, the pressure will drop. But standby losses for six months out of every year can add up. Granted, the unit dedicated to heating the floor only wastes heat during the winter months. All water heaters waste heat energy, even when the burner is off and the unit is sitting idle between heating cycles. If freeze protection is an issue, than a closed system with anti-freeze is a good idea. Regardless of which radiant heating system you choose, be it Open, Closed Or heat exchanger, or type of fuel source you require, Propane, Natural gas, Electric or Oil,…Radiant Floor company has you covered!!!Ī two zone closed system with on demand unitĪn example of a 3 zone space saviing custom designĬlosed systems are often used in second homes or primary residences in areas prone to long power outages. We offer units that will heat both your Radiant (space heating) and domestic hot water. These highly efficient heaters are built with Radiant heating in mind. The percentage of anti-freeze (Propylene Glycol) is determined by the type of heat source (on-demand heater or tank-type) and by the guidelines listed on the anti-freeze container.ĮVERY heating unit that Radiant Floor company recommends and offers is “DESIGNED & RATED FOR SPACE HEATING”! These units are not your “typical” water heaters, so don’t let the compact size fool you! All of our heating units are manufactured to an industry standard of quality and reliability. The main advantage to this system lies in the fact that, being closed, anti-freeze instead of water can be used as the heat transfer medium. There is no connection whatsoever to the domestic water supply. The fluid in a closed system is re-circulated around and around in a completely closed loop. ![]() ![]() This approach utilizes a dedicated heat source for the radiant floor. ![]()
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