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Posted by HeatPro on December 11, 2007 at 12:42:28:
In Reply to: COLD PRESSURE/ DISTANCE posted by pete on December 11, 2007 at 12:30:16:
does the distance of the farthest baseboard heater mean anything?
++ Yes, you are right in suspecting that the distance a pump has to move water through a restriction like a tube requires sufficient pump over to overcome the resistance. That is what the charts here are about.
Or is there different pressure circulators you use for distance?
++ Circulators for residences work under the idea that contractors won't exceed certain distances with pipe sizes, so the head pressures of the commonly-used circulators are roughly in the same strengths. This also prevents too high a pressure pump which can cause noise and other problems.
If so what are some of the common pressures to distance?
++ As many of the residential circulators top out near 10 feet of heat or roughly 5 psig, many designers use that reading on distances not exceeding a circuit length from boiler and back to the boiler of not more than 250 feet of 3/4-inch tubing. They can adjust that for different pump heads by using the charts similar to the above reference.
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