Posted by jtown on October 19, 2001 at 07:15:14:
In Reply to: Thermostatic Radiator Valves posted by Mark on October 18, 2001 at 22:09:00:
Thermostatic air vents are used on one-pipe. They close off the air venting. They do not work on the first cycle of the day if there has been a setback etc. If they close after the air is vented, steam keeps coming in replacing the condensing steam. Determine your overheating pattern, over boilerroom, along a riser that has oversized radiation, solar gain, thermostat location etc. If you have a big solar gain, an outdoor reset might help by sensing it sooner. Some brands to check; Honeywell, Danfoss, ISTA try their websites.
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