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  1. Until you know the capability of the coil you and...

    Until you know the capability of the coil you and we are guessing and the odds are against you. You can get the design outside air conditions from weather data but you need to know the desired...
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    I've been on both sides of this. As a design...

    I've been on both sides of this. As a design engineer I resented being approached tactfully because that implied from the beginning that I was an arrogant SOB. When someone started that I cut them...
  3. Heat is heat and the design total is what you...

    Heat is heat and the design total is what you want. If data is not available test the coil when it is overloaded.
  4. If you know the design airflow and delta T of the...

    If you know the design airflow and delta T of the coil you can calculate total heat transfer which is what you need.
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    I see where you are coming from Scoobie and don't...

    I see where you are coming from Scoobie and don't actually disagree. It is the assumptions that are iffy in an existing building not the calculations. For design purpose I don't like blower door...
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    Designs are done using calcs. Fight fire with...

    Designs are done using calcs. Fight fire with fire. Outside air design and actual quantities are not wild cards.
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    Do the calcs and know they are correct. Send him...

    Do the calcs and know they are correct. Send him a copy of the calcs thru channels prior to discussing your point with anyone. If he is willing to discuss the situation with you in a logical way you...
  8. I live in Kansas PHM. What do you need?

    I live in Kansas PHM. What do you need?
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    Buy a tachometer and measure the fan RPM @ 60 Hz....

    Buy a tachometer and measure the fan RPM @ 60 Hz. From there if you wish you can calculate the actual RPM pretty close.
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    2sac I worked with a lady engineer from Russia....

    2sac I worked with a lady engineer from Russia. One of the things she told me was the first time she went to the grocery store here she burst into tears. She couldn't believe her eyes with the wide...
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    They will impact each other but the pump VFD'S...

    They will impact each other but the pump VFD'S will modulate to maintain differential pressure set point. As long as both pumps are maintaining DP set point you will have design flow to each system....
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    Lost Messaages

    I have just learned some of you have sent me messages. I never ignore any of you and apologize for not responding. My email address is on my profile and you are welcome to email me any time. If you...
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    The Words Don't Exist

    Words are not good enough to explain the GREAT UNITED STATES OF AMERICA. This is the greatest country that has ever existed on the earth by far. God has blessed us beyond belief because "IN GOD WE...
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    I agree there will be a brokered convention. That...

    I agree there will be a brokered convention. That will probably come about by declaring Biden nuts just before the convention. That gets the democrats off the Sanders hook. The nominee could be Mrs....
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    Control of the pumps should be by differential...

    Control of the pumps should be by differential pressure not GPM. The pumps will ramp up and down to maintain set point.
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    You got it retired btc.

    You got it retired btc.
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    When I went to Army boot camp the field first...

    When I went to Army boot camp the field first sarg taught us how to use toilet paper. It only takes one sheet if done properly.
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    The hording of toilet paper is the best example...

    The hording of toilet paper is the best example of stupidity I know of. If you look on line there are 150 toilet paper manufacturing plants in the US. The only reason for the shortage is hording.
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    In a closed system keeping the coils full of...

    In a closed system keeping the coils full of water isn't a problem. There is a thread that discusses balance valves versus control with equal percentage control valves that gets fairly detailed.
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    With all our prayers going his way Michael has a...

    With all our prayers going his way Michael has a better than 50/50 chance. He remains optimistic and that's a plus.
  21. Corny you amaze me. No matter how sorry you are...

    Corny you amaze me. No matter how sorry you are your hatred for President Trump pushes you to new lows.
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    Where do you get your information corny??? The...

    Where do you get your information corny??? The democrats for one thing are trying to get new green deal crap in the bill such as commercial jet fuel economy and emissions. Even if that was feasible...
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    That post makes me double glad I'm retired and...

    That post makes me double glad I'm retired and live in the country.
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    It is really sad when we trust the doctors and...

    It is really sad when we trust the doctors and hospitals with our lives but we don't trust them to be totally honest. I actually do trust them to tell me the truth.
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    In part we are paying the price for gross...

    In part we are paying the price for gross dishonesty. Nobody trusts nobody. If that wasn't true the hospital staff could tell the patience why the nurse was wearing the mask and nobody would have a...
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    In that case bigguy I would set it up so it never...

    In that case bigguy I would set it up so it never opens. The secondary only takes off of the primary what it needs and the rest is recirculated back to the chiller. If the start and stop of the...
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    Poll: Don't be too hard on the morons Glenn. Without...

    Don't be too hard on the morons Glenn. Without them where would we be? There are a lot of good answers to that question so I'll drop it there.
  28. I have had good luck GA doing the same thing....

    I have had good luck GA doing the same thing. Some of the auto parts stores around here are no longer scanning because so many people are changing parts and then returning them when that doesn't fix...
  29. I liked it before auto's went to computer control...

    I liked it before auto's went to computer control because they were easy to troubleshoot. It would be great if the computer systems sensed, analyzed, diagnosed and printed out the exact problem when...
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    If you have a constant pressure system the bypass...

    If you have a constant pressure system the bypass valve is to maintain chiller minimum flow at low cooling loads, The bypass valve should be controlled with minimum allowable chilled water flow...
  31. I'm wondering if Biden will lose it when he...

    I'm wondering if Biden will lose it when he debates Bernie and starts using his fist after his alligator mouth overloads his humming bird ass. He's really that nuts.
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    The biggest problem I had was on different...

    The biggest problem I had was on different diffusers. I finally concluded that the distribution of the air across the diffuser was the biggest problem. If there was an elbow close to the diffuser it...
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    I spent a lot of money on a rotating vane and was...

    I spent a lot of money on a rotating vane and was bitterly disappointed in it. I wanted to use it on diffusers I couldn't get a hood on. If There were say 6 diffusers alike I thought I could hood one...
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    This is the best place to be mentored I have...

    This is the best place to be mentored I have seen. The amount of knowledge here is astounding and shared freely. I got very little mentoring in the design engineering field but shared what I learned...
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    Poll: My brother in law was a conservative libertarian....

    My brother in law was a conservative libertarian. The biggest thing we didn't totally agree on was sending troops abroad. For the most part I don't want to send them but I don't know of an occasion...
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    Poll: Conservatives and libertarians have a lot in...

    Conservatives and libertarians have a lot in common. Because of that I only checked conservative.
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    Joe Biden has made this a lot easier. The...

    Joe Biden has made this a lot easier. The hundreds of thousands of democrats that have voted for him in spite of the fact he don't know where he sh** last tells you they are functioning in the same...
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    All things considered they are trying to protect...

    All things considered they are trying to protect the fans from the PLAYERS.
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    szw21 my last post is missing. Concerning your...

    szw21 my last post is missing. Concerning your post #21 Pitot traverse of the duct does not use AK factors. I may have misunderstood your post because I don't know how you intend to traverse a...
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    If you want a constant volume system to cool the...

    If you want a constant volume system to cool the entire building it has to run at a constant GPM. The biggest chilled water problems I have seen is adding on to a constant volume system by adding a...
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    There were a confirmed 175,000 people wanting to...

    There were a confirmed 175,000 people wanting to attend his rally in New Jersey tonight. He has done an incredible job and everyone but the swamp creatures and their crowd knows it.
  42. With zero compression on one cylinder Poodle...

    With zero compression on one cylinder Poodle wiring wasn't the whole issue. When my van started running really rough the computer started making changes to compensate. The changes didn't work but...
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    Great story BBeerme. She did what I was alluding...

    Great story BBeerme. She did what I was alluding to. She got the degree she wanted and then took things to the next level. All education is worth while but first things first. Engineering really is a...
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    You misunderstood me Scoobie. HVAC is a highly...

    You misunderstood me Scoobie. HVAC is a highly technical profession and is best comprehended by studying it in school. Just the action and reaction of the refrigerants gets complicated.
    Read post...
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    That's an assumption corny and useless in court.

    That's an assumption corny and useless in court.
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    I would install a VFD to get the soft start but...

    I would install a VFD to get the soft start but you need to run it at a constant speed.
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    Ukraine got the money and did nothing to get it....

    Ukraine got the money and did nothing to get it. Even if Trump wanted to withhold the funds he didn't so what crime did he commit? This all reminds me of a comedian that said some guy had a sign in...
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    Is this a constant volume or constant pressure...

    Is this a constant volume or constant pressure system?
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    All you guys stories are both interesting and...

    All you guys stories are both interesting and baffling. It's hard to understand why and how someone can sell themselves as something they are not.
  50. The liberal democrats know they can't evolve into...

    The liberal democrats know they can't evolve into dictators unless they make the vast majority dependent on them. For that reason they don't want the country to prosper. Obama tried to sell his "new...
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