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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
