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  • Users: ssn61
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  1. ssn61

    Underground utilities

    I am not sure if this is the right forum to ask this question but anyhow, this is my question. In the horizontal (building) architectural/MEP engineering world, who is responsible for identifying and relocating underground utilities that fall under the footprint of a new building. For example...
  2. ssn61

    Underground utilities

    I am not sure if this is the right forum to ask this question but anyhow, this is my question. In the horizontal (building) architectural/MEP engineering world who is responsible for identifying and relocating underground utilities that fall under the footprint of a new building. For example...
  3. ssn61

    Hot Water Heat Exchanger

    I am working on design-replacement of two older heating water boilers with two new condensing boilers- 3,300 MBH each. One of my colleagues mentioned that during summer we can use the heating water out of these boilers and preheat domestic water via a heat exchanger. Does this have any energy...
  4. ssn61

    Ice Rink Design

    I have a client who asked me to prepare the MEP construction document for an ice rink. I would like to know what the main design requirements are, especially on mechanical side- such as codes, standards, etc. Does the mechanical engineer usually design the ice rink itself or is a third party...
  5. ssn61

    Marketing for a small MEP firm

    I hope this is the right forum to post this. I am trying to find projects for a small MEP engineering firm. So far I have found out that the most effective way is to schmooze up to architects since owner prefer dealing with one firm (mainly an architectural firm.) Obviously, finding the...
  6. ssn61

    Combining Electrical and Gas meters

    I am working on a project in Dallas, Texas. The owner wants to combine two existing suites in a shopping plaza and make them one large suite. I need to know what approach to take to combine the electric and gas meters.
  7. ssn61

    Fire rated walls

    I am working on bathrooms renovation at an existing assisted living building in Texas. We want to route the exhaust duct through the outside walls. The question is whether NBC and NFPA codes allow that. Are perimeter walls in such buildings fire rated? If they are, then can we penetrate them...
  8. ssn61

    Rated Walls

    I am working on bathrooms renovation at an existing assisted living building in Texas. We want to route the exhaust duct through the outside walls. The question is whether NBC and NFPA codes allow that. Are perimeter walls in such buildings fire rated? If they are, then can we penetrate them...
  9. ssn61

    Single Zone VAV System

    I have a specific question regarding control of SZ VAV systems. I know once the space temperature is satisfied, we need to ramp down the fan and modulate (close) the CHW vale to maintain DAT (specially for humidity control purposes,) but how exactly should the sequence of operation be for...
  10. ssn61

    How to market our MEP consulting engineering business

    Does anyone know a website or have any tips on writing "introducing our company" emails to architects? How can I word the email to get them to at least give us a meeting?
  11. ssn61

    K-12 School Library humidity control

    What is the recommended temperature and RH for Libraries in K-12 schools. ASHRAE HVAC Application handbook- 2011, chapter 7 says: " To avoid growth of mold and mildew, a dew point above –1°C (33.8 F) and maximum of 55% rh are recommended. Does this mean we can not have a temperature of 72 F...
  12. ssn61

    Warehouse design

    I am designing a warehouse (ventilation, heating, etc.) in Dallas, Texas. Owner is a used car dealer and stores cars in this 20,000 sq.ft space. There is a prefabricated paint booth in the warehouse. There are 3 existing exhaust fans, 12000 cfm each. What are the related codes, standards and...
  13. ssn61

    Electrical system courses for non electrical engineers

    I am a mechanical engineer and live in Dallas, Texas area. I am looking for a electrical system training course that is offered for non electrical engineers, mainly focuses on design of electrical distribution systems in industrial and commercial buildings, including service to all types of...
  14. ssn61

    How much work and how involved work of an engineer/project manager should be?

    I am the engineer of record and project manager for MEP renovation at a school. We are in CA phase right now. Owner was supposed to have third party commissioning done on this project but I believe they are not going to hire a commissioning team and save the money. My question is, how...
  15. ssn61

    Electrical system courses for non electrical engineers

    I am a mechanical engineer and live in Dallas, Texas area. I am looking for electrical system training courses that are offered for non electrical engineers in this area? University of Wisconsin in Madison offers great courses but it's too costly for me to travel and stay there for a few days.
  16. ssn61

    Janitor Closet Ventilation

    I am working on HVAC design of a office-warehouse. There is a janitor closet that opens to the warehouse, about 35 sq.ft. Is there any code requirements for ventilation of this closet? I know ASHARE 62.1 calls for 0.12 cfm/sq.ft. for a storage. In this case that's only 4 cfm. Plus, this is a...
  17. ssn61

    Cooling Coil Condensate Drain Pipe Sizing

    Is there a standard or code required condensate drain line sizing procedure or chart? I have charts from different manufacturers that I have used for sizing these pipes but none of them say where they got the information from. I have looked up IMC and IBC but did not see any information.
  18. ssn61

    VRF vs. Chilled water system

    I have designed a chilled water system for a HVAC renovation of a school that has existing chilled water system. Classrooms used to have unit ventilators and I recommended to replace them with new ones. One of the mechanical contractors that are also engineering compnay has made a comment as...
  19. ssn61

    Chilled water system bypass

    In order to keep the minimum flow through a chiller (or a boiler), where is a good location to put a bypass in a variable primary pump system?
  20. ssn61

    Air Handler Units Configuration

    I am specifying air handling units with chilled/hot water coils, VFD supply and exhaust fans, single zone, full economizer mode. Project is a school in Dallas, Texas. What are your opinions on heating coil in preheat vs. reheat position, draw thru vs. blow thru fan location, and other thoughts...

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