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  1. hvacSLOG

    Business savings accounts

    I would look into opening a business brokerage account with vanguard or similar. Then you can easily transfer funds and buy an ETF that tracks the US dollar like vusxx… I think it’s paying more than any personal savings account. But then again, maybe see what happens after June 1…
  2. hvacSLOG

    "fishmouth" in hot / chilled water piping

    Thank you for your responses. I appreciate the insight and the code references - will review. Thanks
  3. hvacSLOG

    Calculating Actual Pump Speed with VFD?

    My calculation would be as follows: CALCULATED GPM AT REDUCED SPEED = FULL SPEED GPM * (REDUCED PUMP RPM / FULL SPEED RPM) This is based on affinity laws and doesn't take into consideration your particular system curve or any dynamics of your system (valves opening and closing). I believe...
  4. hvacSLOG

    "fishmouth" in hot / chilled water piping

    Distinguished Technical Experts-- Have you come across the practice of welding a "fishmouth" instead of using a "tee" for branch piping? I don't like a "bastard fitting" in ductwork...but should I have any objections for hydronic piping system? in terms of pressure drop or other reason to not...

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