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 TugboatEng 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 trueman

  1. trueman

    Aircraft Hangar Trench Design / Direction

    Hi there, I am working on a retrofit project to convert an existing building into a hangar. I am looking for a code / NFPA reference for Hangar trench direction (parallel or perpendicular to the plane) depending on whether the airplane pull-in tail first or is there any relationship? I couldn't...
  2. trueman

    Heat Recovery and Condensation in a Manual Car Wash Building

    thread403-411430 I am working on a manual car wash facility and wondering if anyone has worked on a ventilation system with heat recovery in a place where winter temp. is around -4 F and 80%RH. If I had a heat recovery system, what would be an option to avoid or get rid of condensation or...
  3. trueman

    Make-up Air Unit and Exhaust Fan

    Hi all, I think I figured out after reading all the comments. My exhaust fans are totally redundant because my S/A = R/A and I don't think I need them as back up. One question to @chicopee ; why would direct fired unit heater be a problem? Because of the condensation and gas emission?Yes...
  4. trueman

    Make-up Air Unit and Exhaust Fan

    Hope this can explain...
  5. trueman

    Make-up Air Unit and Exhaust Fan

    Hi Everyone, I am working on a diesel vehicle storage building in Manitoba. The client wants to meet Green Globe Standard (another version of LEED). That's why we have a gas fired make-up air unit that comes with Supply Fan, Return Fan, Heat Recovery and High Efficient Furnace. This system is...
  6. trueman

    Do I have to upgrade from R22 to R410 ?

    Thanks for your responses! I talked to the client about the units and they said they are aware of it and looking for solution.
  7. trueman

    Do I have to upgrade from R22 to R410 ?

    Hi All, I am working on a roof replacement project in Cold Lake, Alberta. There are 2 to 3 A/C units (around 5 tone units) that are using R22. All we are doing is to uninstall the units and once the roofing is done, we will re-install the existing units back. In this situation, do we have to...
  8. trueman

    Return Air in Car Storage?

    I am working on a vehicle storage project in Manitoba and I would like to know if I can recirculate the air in a vehicle storage. In my current system, I will have a makeup air unit with supply, exhaust fans and heat recovery system. The storage will be monitored with CO and NO2 sensors to...
  9. trueman

    Frost Protection on AHU Unit with Plate Heat Exchanger Heat Recovery

    Ok, will do. Thanks for the tips!
  10. trueman

    Frost Protection on AHU Unit with Plate Heat Exchanger Heat Recovery

    Yes, it is a pre-heat coil. The AHU runs only during the day, and it will be off night time thats why we added glycol system to protect the coil. I'd like to know what temperature I need to bring the outside air to. I think I have to heat outside air up to 55F but I saw someone was saying it...
  11. trueman

    Frost Protection on AHU Unit with Plate Heat Exchanger Heat Recovery

    I am designing a 100%OA system where frost protection (35%glycol) will be running through heating coil (AHU unit has Plate heat exchanger). Winter outdoor temperature is -7 C. My question is what temperature I need to bring the air at the heating coil to avoid any damage on the coil? There are...
See more

Part and Inventory Search

Back
Top