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Type: Posts; User: mmesford

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  1. Replies
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    No worries. It's impossible to tell who has...

    No worries. It's impossible to tell who has experience and who doesn't. Even with lots of experience one can make dumb mistakes, trust me! I like the idea of a makeup header tank of some kind....
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    Well, there was no "building engineer" involved...

    Well, there was no "building engineer" involved in this design I'm sad to say. Just a couple of small town plumbers with a basic knowledge of these systems. We've had them out a time or two but they...
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    Sure. What is it you want explained?

    Sure. What is it you want explained?
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    695

    My experience with similar systems is that...

    My experience with similar systems is that continued running will consolidate air bubbles. The air vent fitting is supposed to vent such consolidated bubbles in normal operation. But if the system is...
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    The pump noise hasn't changed. It does sound...

    The pump noise hasn't changed. It does sound noticeably louder when first started up after being shut down for the summer. That may be normal or it may represent a redistribution of entrained air....
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    There is no make-up source keeping the system...

    There is no make-up source keeping the system full. It's a closed system.

    There is a hose bib plumbed in on the suction side of the circ pump. I was planning on hooking a hose to that and...
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    Long-term leak in hydronic heat system

    Hi,

    We just discovered a drip in our system that appears to have been leaking for quite some time. I'm assuming that air has been getting in to replace the water, most likely via the device...
  8. Yeah, I'm pretty sure it's at the highest speed. ...

    Yeah, I'm pretty sure it's at the highest speed. The original installation used a smaller pump but we went to this one to try and increase temps by increasing flow.
  9. I'm told the pump is a Grundfos UPS26-99FC.

    I'm told the pump is a Grundfos UPS26-99FC.
  10. Total loops is 13. I've sent an email off asking...

    Total loops is 13. I've sent an email off asking for the model of the pump.
  11. I assume it's the circ pump your wanting the...

    I assume it's the circ pump your wanting the specs for? I can email my HVAC guy and ask for the model #.
  12. Thanks, everyone, for your thoughts. I think the...

    Thanks, everyone, for your thoughts. I think the insulation isn't an issue but I'm going to inspect and confirm. I like the idea of determining flow rate from pressure diff, but I agree, it might...
  13. The loop lengths appear to be around 300'. There...

    The loop lengths appear to be around 300'. There are 7 upstairs with three control zones, and 6 downstairs with 5 control zones. I'm currently away from home so I don't have the pump info in front...
  14. There are balance valves although they are all...

    There are balance valves although they are all fully open. But in my mind we've ruled this out by the fact that a problem zone doesn't change even when all the other zones are secured.
  15. The downstairs is slab on grade. One of the...

    The downstairs is slab on grade. One of the problem rooms is down there. Upstairs we have tubes set in concrete on top of the subfloor with plank alder finish floor. We've had him confirm the...
  16. Radiant floor not coming up to temp in two rooms

    Hello,

    We have a new house with radiant floor heating. The heat is provided by an air-to-water heat pump. For the most part the system works well. But we have two rooms that never quite get up...
  17. So how do you feel about the hundreds of billions...

    So how do you feel about the hundreds of billions of dollars in subsidies paid to fossil fuel companies?


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  18. Forget Right an Left. Forget Democrats and...

    Forget Right an Left. Forget Democrats and Republicans. The vast majority of actual scientists, who might be Democrat or Republican in their political views, accept climate change as a reality. This...
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