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!

Search results for query: *

  • Users: EnOm
  • Content: Threads
  • Order by date
  1. EnOm

    Wastewater treatment for a hotel

    Hi I am looking for any references on how to size a small wastewater facility for a 10 storey hotel. The system description is as follows: Wastewater from showers and wash basins is collected in a tank in the basement. (Untreated water tank) A treatment plant (Pumps, filters...etc) draws the...
  2. EnOm

    Combining drainage stacks

    Hi I was wondering why I never see anyone combining drainage stacks. What is the logic behind it? What I mean is: DWV System 10 storey building and I have fixtures on both sides of the building One 4" waste stack on each side for the sake of explanation. Both with an attendant vent stack...
  3. EnOm

    Hotel daily Water Demand

    Hi, Can anyone point me to a method that can be used to estimate the water demand of a hotel? To be more specific I want to be able to estimate the daily water need of the hotel in order to size the water tanks. Is it based on the number of rooms? ..etc. Any references on the topic would be...
  4. EnOm

    Question about venting fixtures on the ground floor in a multi-storey building

    Hi, I have a building of 4 stories that has a DWV drainage system. Every waste and soil stack is accompanied by a vent stack. Waste and waste and soil stacks are connected to inspection chambers on the ground floor level. The inspection chambers are position away from the building by a...
  5. EnOm

    Top Spigot Linear Slot Diffuser

    Hi, Can someone point me to a manufacturer that makes Linear Slot Diffusers the connection spigot on the top of the plenum box. Are there any that makes those as standard? Or do they have to be custom made? All the catalogs I have come across so far have side connections only. Thank you. Best...
  6. EnOm

    AHUs for Cooling (Chilled water) & Heating (Electric) catalogs.

    Hi, I've been looking for some electronic product catalogs for AHUs for Cooling (Chilled water) & Heating (Electric). The exact reason is that I want the electricity load for that kind of equipment. I've went through Greenheck's CAPS Engineer but I can't seem to change the power supply taken...
  7. EnOm

    Recommended Pump Combinations (duty,standby)

    Hi, I was wondering what is the most recommended pump combination in the following situations. 1- Underground pump room for a residential swimming pool. A submersible pump is required for filter backwash, draining the pool...etc. My current thinking is (duty + 100% standby) 2- Submersible...
  8. EnOm

    Sizing/Specifying cold water supply pipes in very hot environments

    Hi, Where I live temperatures get really hot in the summer, around 110°F, and during summer if a cold water supply is opened the water that comes out is too hot to touch. This lasts for around 3 months out of the year. Does this mean that the "cold" water supply network inside the house should...
  9. EnOm

    Issue with BS 6700

    Hi, I have a question regarding using BS 6700:1997 to size water pipes. My issue is as follows: on page 30, under (2.5-Pipe sizing) it states The system shall be designed and installed so that the design flow rates given in table 3 shall be available at each outlet and any group of outlets...
  10. EnOm

    Water Velocity in PP-R (Polypropylene Random Copolymer)

    Hi, I was wondering if anyone has experience regarding the maximum allowable velocity in PP-R pipes for domestic water supply. What I'm currently using is 6 ft/s for cold water supply, and 4 ft/s for hot water supply. I'm especially doubtful about the hot water supply figure because I am...
  11. EnOm

    Hot Water Circulation Pipe Sizing

    Hi, I have a question regarding domestic circulation pipe sizing. I have already calculated the flow required from the circulation pump. I sized the main return pipe to keep velocity under 4 ft/s, but what about the pipes branching out to the separate floors and the different utilities on them...
  12. EnOm

    Extract Fan Options

    Hi, I have a house that has 10 toilets/wash rooms that is to be serviced by a central exhaust fan. I want to discuss some of the options that I have regarding this. 1- Intermittent Exhaust #1: Use a constant speed fan that is turned ON/OFF whenever a switch is flipped in any toilet or washroom...
  13. EnOm

    Mixed Residential Basement (Car Park + Living Quarters)

    Hi. I have a large mansion with a rather large basement. The basement floor slab is at -9 ft and the basement ceiling slab is at +3 ft. The basement is divided between: 1- A car park (5800 ft²). Access is through a single entrance/exit ramp. 2- Residential Quarters. Bedrooms, kitchen, storage...
  14. EnOm

    Air Velocity in Parking Exhaust Duct

    Hi What is the maximum acceptable design velocity for air inside the ducts in a small parking about 6 ft below ground level? I'm talking with respect to acceptable noise levels/acceptable pressure drop. The main duct riser will then rise up to the roof of the building through a shaft between...
  15. EnOm

    Pressure Requirement for Water Fixtures

    Hi, I have a question regarding the following: I have a toilet at ground level that is supplied water from a small tank placed directly on top of the roof slab (It's part of an auxiliary building). The roof slab is +3m above the toilet's floor level. Disregarding friction losses, the maximum...
  16. EnOm

    The need for Standby pumps when VSD is avialable

    Hi I was wondering whether standby pumps are required when the lead pump is coupled with a Variable Speed Drive (Sometimes also called Variable Frequency Drive). Say I have a design flow rate of 12.5 m³/hr at 30 m Head (55 GPM at 98.43 ft). There is a pump with a Variable Speeed Drive that can...
  17. EnOm

    Diverting Fresh Air to Ceiling Space when FCU is OFF

    Hi, I have a bedroom with an adjacent toilet. The room has continuous exhaust (via the toilet) and continuous Make-up Air The FCU is located in the toilet above the ceiling space. The return air is ducted back to the FCU to avoid picking up any odors from the toilet. The fresh air is injected...
  18. EnOm

    Combined Kitchen Ventilation ( Continuous+ Intermittent )

    Hi I have a rather large residential kitchen and I already have an Exhaust Kitchen Hood (550 CFM) in there. The kitchen hood will operate intermittently. Would there be an added benefit to adding a Ceiling Exhaust Grill linked to the residence's continuous exhaust system? If there is an added...
  19. EnOm

    ACMV: Summer vs Winter

    Hi I have come across ACMV systems that are designed for Summer time operation but seem to disregard Winter time operation. You have the typical setup. AC units, exhaust fans, and Make-up air fed into the AC units to compensate for the air that is thrown out. I was wondering what the scenario...
  20. EnOm

    Smallest Practical Air Flow Volume Controlled by Dampers

    Hi What is the smallest practical airflow one can work with when designing duct work. Say I have a laundry room which a min exhaust rate of 15 CFM. Is it practical to try and exhaust this rate by placing a damper in the duct work? The smallest airflow amount specified on a plan I've seen so far...

Part and Inventory Search

Back
Top