A/C Fan Speed

Lady Fitzgerald · 09-14-2011, 12:14 AM

How much difference is there between high and low fan speed in noise and air flow with the Coleman A/Cs?

**norty1** · 09-14-2011, 02:54 AM

I do not any means to measure it except my wife's opinion. She says it is much quieter, yet does the job. We leave it on low. Have not been in extremely hot areas yet to get more experience. On our rig, closing some of the vents on the unit make it quieter in the immediate area.

edatlanta · 09-14-2011, 06:00 AM

I don't see enough difference in mine to justify one setting over the other. I leave it on high when it is terribly hot outside and usually on hot all the time because I forget to change it. I see no reason for the low setting.

Terry · 09-14-2011, 08:21 AM

On mine - I literally can not tell the difference. I have a ducted system so my hi/low switch is opening and closing the quick cool doors.

I installed an aftermarket thermostat and just left the low wired capped.

NewToMeJF26BHS · 09-14-2011, 08:34 AM

We can tell the difference although the high setting is not terribly loud. But however, since our trailer isn't terribly huge (length of a football field) we leave ours on low and even when it is real hot (I live in Lower AL) the low setting is more than enough to keep the trailer cool.

John

jwstewar · 09-14-2011, 11:24 AM

I can tell quite a bit of difference in the sound of ours. If you have it on hi and open the quick cool vents it is quite loud in the main living area. So unless absolutely necessary we will leave it on lo and leave 2 of the 3 quick cool vents closed. Usually leave the one open that directs the air toward the table. I just recently did the digital thermostat mod and made sure I wired in the hi/lo switch. It has been a bit of a challenge to teach the wife that the middle off position isn't to be used.

We camp out the county fair for 10 days in August. It is usually on hi w/ 2 of the 3 quick cool vents open - the 3rd hits the stove bad and makes it hard to cook.

Terry · 09-14-2011, 02:49 PM

This topic has come up on several different forums at different times. I know when I initially got my camper I thought there was a problem with the AC, but quickly found out that other folks experienced the same thing. Seems like every unit has its own personality on how loud it is and the differential in air between high and low.

Lady Fitzgerald · 09-14-2011, 03:30 PM

Quote:

Originally Posted by tafische

This topic has come up on several different forums at different times. I know when I initially got my camper I thought there was a problem with the AC, but quickly found out that other folks experienced the same thing. Seems like every unit has its own personality on how loud it is and the differential in air between high and low.

Good point. Let me rephase the question. Since the 330RLTS is the TT I plan on getting, could just the 330RLTS owners tell me how much difference is there between high and low fan speed in noise and air flow with the Coleman A/Cs?

jeeperx2 · 09-14-2011, 03:58 PM

Not a 330 owner but a 324 is close. I personally have never had my fan on low Because my single 13,500btu AC will not keep up when its hot out. My point is if you have not gotten this trailer yet I would opt for either the single 15,000btu upgrade or the 2 AC option.

**FPM III** · 09-14-2011, 04:41 PM

Although I have no scientific evidence to support this, I would think an A/C unit that has ducted cold air registers would, overall, be slightly quieter than one that doesn't.

Lady Fitzgerald · 09-14-2011, 05:31 PM

Quote:

Originally Posted by jeeperx2

Not a 330 owner but a 324 is close. I personally have never had my fan on low Because my single 13,500btu AC will not keep up when its hot out. My point is if you have not gotten this trailer yet I would opt for either the single 15,000btu upgrade or the 2 AC option.

Actually, what I am strongly considering is trying to talk Jayco into NOT installing any A/Cs and thermostats (and credit me for them) then putting a couple of Coleman 15k heat pumps on top and Coleman digital thermostats inside. As far as I can tell, the thermostat wiring running from the A/C locations to the thermostats is four conductor (12v+, 12v-, compressor, high fan, and low fan). Coleman heat pumps also need a reversing valve lead between the heat pump and the thermostat (they refer to it as "heat pump"). If there isn't a whole lot of difference between low and high speed, I could "steal" the low fan lead to use for the reversing valve. To make sure some "helpful" person (or me before I fully wake up) doesn't come along and switch the fan speed from high to low, thus shutting off the fan, I would run a jumper from the low speed terminal in the thermostat to the high speed terminal.

Using the low speed fan wire would save me the hassle of trying to fish a new thermostat wire through the ceiling and down the wall (which would be fairly easy in the bedroom if the thermostat is on the wall between the bedroom and the bathroom; long story why) but a total bugger from the kitchen to the hall thermostat.

I could use the old thermostat cable to pull the new one from the kitchen to the hall wall but even if the hole at the top of the hall wall was fairly generous, the cable would probably hang up there. I could cut a hole in the ceiling in the medicine cabinet and probably reach the hole where the cable dives into the hall wall without too much trouble (more like agony with my bum shoulder but then using it is good for it) and help guide it down with my hand. Afterward, putting up a panel the same size as the inside of the medicine cabinet over the hole would yield an invisible patch. But if there isn't much to be gained in air speed or noise reduction, why bother with all that?

chas111 · 09-19-2011, 01:45 PM

So the vents on the actual unit in the ceiling can be closed so the other ceiling vents are working?

Lady Fitzgerald · 09-19-2011, 02:03 PM

Quote:

Originally Posted by chas111

So the vents on the actual unit in the ceiling can be closed so the other ceiling vents are working?

Assuming the TT has ductwork (which the 330RLTS does), yes. The vents on the actual unit are intended to be used for quick cool down when first turning the A/C on in a hot room but, as others have mentioned, sometimes using them at all times seems to work better in some RVs

Terry · 09-25-2011, 08:32 PM

When it is really hot outside - like in the 90s - and folks are coming in and out a lot - I usually have to keep the quick cools open to keep up. At night I can close them and it runs at about 1/3 of the noise and pumps plenty of air back to the bedroom - which I like.

NewToMeJF26BHS · 09-25-2011, 09:03 PM

Quote:

Originally Posted by tafische

When it is really hot outside - like in the 90s - and folks are coming in and out a lot - I usually have to keep the quick cools open to keep up. At night I can close them and it runs at about 1/3 of the noise and pumps plenty of air back to the bedroom - which I like.

Forgive my ignorance, but what are "the quick cools"?

John

clutch · 09-25-2011, 09:28 PM

Our air conditioners are always on low. It is a lot quieter that way. If the main one can't keep up we just turn on the front ac.

Even on low they make some noise so when we go to bed we turn off the front one and it is easier to sleep. They are both connected as far as ducts go so the main one will still cool the bedroom.

Terry · 09-25-2011, 09:47 PM

Quote:

Originally Posted by NewToMeJF26BHS

Forgive my ignorance, but what are "the quick cools"?

John

The quick cools are just three sliding lovers on the main AC unit. When you open them, most of the air blows out of main grill. When you slide them closed, it pushes more air out the ducted vents. You can close one, two, or all three of them. The AC pushes more air and cools better when they are open - thus "quick cool" name - it just produces more nose when they are open.

NewToMeJF26BHS · 09-25-2011, 09:51 PM

Quote:

Originally Posted by tafische

The quick cools are just three sliding lovers on the main AC unit. When you open them, most of the air blows out of main grill. When you slide them closed, it pushes more air out the ducted vents. You can close one, two, or all three of them. The AC pushes more air and cools better when they are open - thus "quick cool" name - it just produces more nose when they are open.

Thank you for that explanation.

John

Lady Fitzgerald · 09-26-2011, 06:56 AM

Quote:

Originally Posted by tafische

The quick cools are just three sliding lovers on the main AC unit. When you open them, most of the air blows out of main grill. When you slide them closed, it pushes more air out the ducted vents. You can close one, two, or all three of them. The AC pushes more air and cools better when they are open - thus "quick cool" name - it just produces more nose when they are open.

"Three sliding lovers" "produces more nose"?

Sorry! Couldn't let straight lines like that just lie there.

**norty1** · 09-26-2011, 07:00 AM

Quote:

Originally Posted by Lady Fitzgerald

"Three sliding lovers" "produces more nose"?

Sorry! Couldn't let straight lines like that just lie there.

Maybe you should ask him if he has a "thick" skin first.:hihi:

You may also like: