ARASH

I would need your suggestions on the ventilation and AC.

We've got the following
1 x P90 Combo
1 x iBED
2 x iDome

At later stage we are not planning to add up anymore units as the location doesn't have the adequate spacing.

The exhaust duct from each unit will be connected to a main duct (50cm x 25cm) that would be going out through the ceiling to the first floor, which is an open area outside the building. At the end of it we would be connecting a 6000cfm exhaust fan to pull all the hot air out.

The current centralized AC is only 4 TONS, therefore its decided to add an additional 5 TONS split unit AC to support the units and the total area size which is 776sq/ft.

The ceiling height would be at 3 meters with low partitions for better air flow.

Now I've heard that same amount of fresh air must be introduced into the tanning rooms from an outdoor vent. How would that be possible when the outside air is always 45C (113F) with humidity being high as well????


Your outputs would be highly appreciated

Robert K

Where are you located?

__________________
Robert Klem
Superior UV Technologies
(888) 526-7712 x77
robertk@superioruv.com

ARASH

middle east

Robert K

I would not vent your units out or at least not with a exhaust fan. The fan will exhaust a lot more air then the beds do. The bed fans only run for a few minutes longer then the session time. Being that the air outside is that warm I would just cool the hot air coming off the units.

__________________
Robert Klem
Superior UV Technologies
(888) 526-7712 x77
robertk@superioruv.com

ARASH

Isn't the hot air supposed to go out?
And if it doesn't, wont the units heat up and not function?
Are you saying the hot air released by the units should be circulated inside the shop rather than outside?

Robert K

The units do not have to be exhausted. It is only warm/hot air. Since the outside air (make up air) is so hot it does not make sense.

__________________
Robert Klem
Superior UV Technologies
(888) 526-7712 x77
robertk@superioruv.com

ARASH

Here is the sketch for the rooms with ducting.



Note that the level above is a tower while there is an open area on the corner. The only way to reach this is to core cut the concrete around 40cm.

I've had two AC engineers telling me that we would be needing a fan at the end to support the heat. But I'm thinking isn't there a possibility that hot air would manage to come inside when outside is 113F?

Someone else has told me to duct only till above the false ceiling and leave it open there but this will cause the air condition not to perform and will cause a moisture above the false ceiling.

Are you saying don't duct any of the units and just leave them open and let them run along the added air condition?

BuyersGroup

Static pressure is the issue with exterior ventilation.

The pressure in your plan would pull air in through every crack and cre ice in your building to offset the outside venting. This would be really bad when the front door opens as air rushes in to offset whatever volume u vented.

DH

Get rid of the false ceiling. This will give you much more volume for the hot air above to go before you exchange it or get rid of it.

I do not use the exhaust duct shown but have 20 foot tall ceilings without false ceilings for the hot air to go for heat exchange. When out door temps stay under 95 all is good (16 tons A/C used) but over that (22 tons A/C needed) it gets rough.

In the winter I use NO heat unless the out door temps get below 20 degrees.

There are some on here that exhaust out of the building as you picture and believe in it. I believe if you have enough volume over head and in the right part of the country, it's better to not exhaust all the way out of the building.

BuyersGroup

Do not remove the plenum. Use it.

Who is doing outside venting in hot climates. That would make no sense.