Air Conditioning a Room With No Window???

[Richard D]

I need to cool a small office(under 300 sq. ft.). This is in a warehouse that doesn't belong to me, so I can't cut any large holes in the roof or walls. A small hole like a clothes dryer duck would probably be O.K. It has a suspended ceiling, I could possibly duct hot air up there?. I'd like to do it for under a grand if possible. I also have a board room about twice that size, I would like to cool it as well, with a separate unit. Any ides?

 

[TangoHotel]

How about a Ductless Unit? They are a little pricey new, but a used one should be reasonable. It only requires 2 small holes.

 

[Richard D]

Really want a "plug and play" unit that is fairly easily installed and removed, no refrigerant lines etc.

 

[pseudorealityx]

What's above the suspended ceiling?

 

[Richard D]

About 2'-3' crawl space. Above that is a storeroom that is kept locked, full of old files belonging to the owner of the building.

 

[dogdog]

I have this one no windows just needed water and drain. funny was just about to post and ask a question about a connector on this unit.
http://koldwave.com/products/default.aspx?path=portable-air-conditioning/water-cooled/Model-5WK14

 

[Richard D]

I don't think that would work here as humid as it is, plus I have no water supply.

 

[pseudorealityx]

About 2'-3' crawl space. Above that is a storeroom that is kept locked, full of old files belonging to the owner of the building.

No such thing as plug and play in this situation. All air conditioners do it move heat around. Mini split is your best option if you can't deal with anything larger than a 4" penetration.

 

[dogdog]

there isn't much choices, it's either air cooled or water cooled heat exchangers.
Maybe you can get an air cooled unit and piped that to an unoccupied space up in those 3' ceiling far away from your room with a booster fan in your 4" mini ducts and send it far away from your room.

 

[LS6 Tommy]

Those Koldwave units aren't anywhere near as cheap as $1k & many areas don't allow once-through water cooled systems. They have to be closed circuit.

Tommy

 

[Hpozzuoli]

Why not get one of them portable air conditioners that sit inside a room and have wheels. All they need is a vent. I would just vent it right into the crawl space. Just turn it on when you are in the office. Sq is small enough to get away with "on demand".

 

[Syberia]

As much as I hate them, a portable sounds like your only option. Be sure to get one with two hoses, otherwise you're sucking cold air out of the room to cool the condenser to generate more cold air... and due to pressure differential that is going to get replaced with warm air from somewhere. Most likely, you'll want a bigger A/C in terms of BTUs than is called for based on square footage, I'd estimate "real world" performance to be about half of what is claimed. For instance, the 8k window unit in my office easily outperforms the "14k" portable I had in there previously.

 

[Richard D]

Anyone had success with a portable? I don't mind buying a big one, I know what you mean about "exaggerated" claims...

 

[cg81]

I bought a 12000 btu portable for our bedroom at our lake house. It was $300 lg unit at home depot. I bought it slightly oversized for our bedroom, 10x12 foot approx. It is the best $300 I ever spent. It maintains about 73 deg on a hot day and will easily keep 68 deg at night. It only has 1 six inch vent I put through the floor to the crawl space. I drain the water at the end of the weekend but you can attach a condensate hose to a drain. You may need more than one for your size room.

 

[blackbriar51]

Put a kitty-kat door in your office door and use a free standing unit with a 4" dryer duct to vent off into the warehouse. Tell your employees to be careful when opening the door and that too, you can establish a door stop so that it only opens so far.

Buy your own "garage sale" door, fit the vent at the top so that it is not accumulating on the ground. You can put the owners door back in when you leave.

 

[Idle Serge]

Back on the mini split option--check this one out:

http://www.totalhomesupply.com/duct...nditioner-heat-pump-p/friedrich-br0412w1a.htm

It was honestly, the closest things can get to plug-N-play on a mini split. I bought the bigger unit which required a 220v connection but the one in the link it a simple house outlet connection. The lines come pre-charged and have a quick connect style ends on the line sets. No pressure testing, refrigerant charged required--all you need is a 3" hole saw, drill, box knife, screw driver and I think a 1/2" socket for the outside unit to bolt onto the supplied slab.



Been running it all summer without any issues thus far.

 

[Richard D]

That looks like it may be just the ticket. Two grand is pretty steep though. My just fix the central unit that is there now for that cost. I can't exhaust it out the door; it opens into a large meeting room, that has it's own A/C unit.

 

[CWO4GUNNER]

Two grand is pretty steep though. My just fix the central unit that is there now for that cost.

Perhaps you should have started the thread with possible remedies for the the central system, might of been just a fuse.

 

[bushmechanic]

My air conditioning isn't working right now, and I've got a drop ceiling.

I just pulled a tile, folded the insulation over, and strapped a box fan in the hole. It's almost a perfect fit, and helps **** the hot air out of the room.

Dropped the temperature ten degrees in an hour or so.

 

[James-W]

I would think the mini-split would be the most viable option.