Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations JAE on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by HVACMech

  1. HVACMech

    Crossing Streams

    That is interesting dbill. I had not realized that some jurisdictions had that restriction. So do you just daylight your condensate, or do you put in floor drains and pipe to storm?
  2. HVACMech

    Crossing Streams

    I do not believe so (further investigation pending)
  3. HVACMech

    Phase Change Material PCM insulation application

    I will say this about PCM. They must make some money, somehow... they have an ad in every edition of the ASHRAE Journal... I haven't used it, but I guess someone must be.
  4. HVACMech

    Crossing Streams

    Alright, here is a fun one. Had a client say they need some help redesigning their storm water system. They had recently been flagged by the city for putting too much storm water in their sanitary sewer system. In my head I snickered, because I feel like the term "too much" and "any at all" are...
  5. HVACMech

    Refrigerant distributors

    Your pressure should fluctuate quite a bit. Since your distributor is working for a temp it will be changing the pressure based on the temperatures. I don't think you will find a good number...
  6. HVACMech

    Bathhouse HVAC

    You don't have to hire a local engineer. There are lots of engineers that work in multiple states. Find a bigger firm, google MEP engineers or MEP consultants. As said before these should be stamped drawing submitted to an AHJ for review. Otherwise you are breaking the law [sadeyes]
  7. HVACMech

    air inlet at walls

    You should put in a transfer from an adjacent space with a fire/smoke damper in the opening. That way you don't pull in unconditioned air into your room.
  8. HVACMech

    Sizing electric tankless Domestic Hot Water system

    You want to do as Pedarrin suggested. You want your gpm's, decide how many fixtures could run at once, and your inlet water temperature. There is no better way to do it really. Newer, more expensive models are better at flow diversity than older models, but you can easily ruin/shorten the life...
  9. HVACMech

    Negative pressure room design

    ZDR, I agree with what you said, but I will say many people refer to ACH in a general term as air being supplied to a space. So I have had people tell me they need 1 ACH of fresh air and 6 ACH in the building. What they actually asking for is a unit that will supply air equivalent to 6 ACH with...
  10. HVACMech

    Why don't air cooled chillers operate as a heat pump?

    Caution on natural ventilation. Verify you are maintaining the required IAQ requirements for your AHJ.
  11. HVACMech

    Heavy Metal

    You don't have to follow energy code if the building is a process, and given the site, the AHJ is the owner so they get to allow whatever they want. We wanted to separate them out, but there is not space on the site to grow the building, or add new buildings. It is very tight.
  12. HVACMech

    Heavy Metal

    Yes we do have to ventilate the spaces. It didn't turn out to be terribly large, about 1 ACH is what it shook out to.
  13. HVACMech

    Heavy Metal

    Building needs to be at 77 because there are large battery racks in the space. 77 is the preferred temp by battery manufacturers. Above that they de-rate them.
  14. HVACMech

    Heavy Metal

    You are correct. There is no humidity source in the building. The concern during the winter was if it is 60 degrees outside, and then goes to 30 degrees in a couple hours, would my interior dew point keep up with outside air dew point.
  15. HVACMech

    Vehicle HVAC System

    http://manchesterradiator.com/images/cooling_system.jpg Here you go. Heat comes from a heater core which is attached to your radiator.
See more

Part and Inventory Search

Back
Top