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leibold
MVM
join:2002-07-09
Sunnyvale, CA
Netgear CG3000DCR
ZyXEL P-663HN-51

leibold to thestealth

MVM

to thestealth

Re: Room AC Unit Faulty?

Exit temperature of the air coming from the AC is 16°C but room temperature only reaches 22-23°C (about the same as outside temperature of 22-24°C) after running all night long ?

Based on this description I would suggest you close the doors and windows and try again

Seriously, it does sound like the unit is working but there is too much heat entering the room. There can be many reasons for this and typically it is a combination of things:

- poor insulation of outside walls
- single pane windows
- air leaks to/from exterior
(those first three you don't normally expect in a Montreal home but who knows)
- open interior doors (a room air conditioner will not be able cool your entire house!)
- air flow through heating ducts
- room below too hot (heat rises and even with ceiling insulation you will get nice warm floor)
- forget to turn off heaters (forced air heating would be obvious but baseboard electric heaters can be easily missed)

To keep the performance of the room AC at maximum ensure that the filters are clean and replace them frequently (since the unit is running non-stop they may need replacement more often) and that the coils are dust free.

StillLearn
Premium Member
join:2002-03-21
Streamwood, IL

StillLearn

Premium Member

I agree with what has been posted. A few thoughts... Temperature drop would normally be measured with a probe that fits into the exhaust vent. If you are using a thermometer totally outside of the AC exhaust, that would increase the measured temperature.

You could close doors to the living room. If there is no door, consider that the AC is trying to cool the rest of the house too. If you are sleeping in the living room during the heat wave, maybe rig some plastic sheets over the openings to the other rooms during the heat emergency.

Look to add insulation and air blocking to your AC install window. If the glass of the window is hot, that is a source of heat ingress. You probably removed the storm window to install that AC. You could cut some foam insulation board for use during the heat emergency. »www.homedepot.com/p/Owen ··· 00320352

I would look to add a second AC unit if you have a suitable power circuit and window.

Keep your refrigerator door closed as much as practical. Opening the door makes more heat into the living space. Reduce the temperature of your hot water heater temporarily.

Brrrr
@151.190.40.x

Brrrr to leibold

Anon

to leibold
said by leibold:

- poor insulation of outside walls
- single pane windows
- air leaks to/from exterior
(those first three you don't normally expect in a Montreal home but who knows)

Montreal houses have really crappy aluminum windows. Their electricity is so cheap, they don't care much about energy conservation. (Most houses have electric heat.)