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Old 05-24-2016, 02:01 PM   #29
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This past weekend, my husband and I helped some extended family members move into their new ranch property. They custom-built their homestead and were careful about picking their a/c system to be as quiet as possible. It was so quiet that one had to be eyeballing the condenser to actually know whether it was running - it really wasn't audible above normal background noise. My reaction was, "You have GOT to be kidding me." It was so amazing that I hauled my husband away from one of his appliance installation jobs and out of the house so that he could witness it.

In stark contrast, own stick-house condensing unit, which is only about 6 years old? 74 dB about one foot from it, as measured using a professional sound meter just now.

I realize that that there is much more design flexibility available when building a ground-based unit - fewer size constraints, more room for coils, etc. But hopefully the technology on the RV units will move in an analogous direction and improve beyond what it is today. I would certainly buy a quieter roof unit if one were available.
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Old 05-24-2016, 02:26 PM   #30
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This past weekend, my husband and I helped some extended family members move into their new ranch property. They custom-built their homestead and were careful about picking their a/c system to be as quiet as possible. It was so quiet that one had to be eyeballing the condenser to actually know whether it was running - it really wasn't audible above normal background noise.
What brand was it? /\ /\ /\ When we turn our A/C on, I'll have to measure our York unit that's about five years old. I know it is very quiet w/ the air movement from the condenser fan being the most noise. That being said, it is a two stage unit and I don't know that I've ever been near it when it was running full blast.

For those of us that just use the AI for travel, the chassis based six ton rear A/C unit like the one on the Transit conversion that the local upfitter showed us is both the quiet way to go and it also actually cools the rear.
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Old 05-24-2016, 03:05 PM   #31
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We have a Lennox and it is very quiet as compared to the previous unit or the neighbor's unit.
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Old 05-28-2016, 05:37 PM   #32
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Answering my own question—

I installed a decibel meter app for my Android phone to find out. The results…... The A/C actually cooling measures 69dB. That's pretty loud. ...
Sitting in the same side-facing seat with the generator running but not the A/C, it's a whopping 82dB, or FOUR TIMES as loud. ....
What the hhhheck contraption did Airstream install in your rig?! Sitting inside, your generator is 82 dB? Seriously?! I can't even imagine that!

Here are our numbers, which I finally measured today. Standing, Sitting and Sleeping refer to spatial positions relative to the couch, which in our case is a jack-knife configuration in the rear - other floor plans might yield different results. By n/a I mean that there's no way I'd attempt to sleep with the a/c on anything but the "low" setting.

As I had noticed qualitatively, the a/c is significantly louder than the generator.

The meter I used here is a low-end professional device that I sometimes use for semi-quantitative work-related illustrations. City of Houston has no zoning but it has been known to enforce its noise ordinance. So sometimes I argue with my clients about what they should and should not build in new locations based on how loud I measure their existing operations to be.
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Old 05-28-2016, 06:15 PM   #33
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What the hhhheck contraption did Airstream install in your rig?! Sitting inside, your generator is 82 dB? Seriously?! I can't even imagine that!
SPL meters in phones are not calibrated, nor do they measure the same spectrum. So his numbers are not absolute and would not match another person's measurements with a different device/phone. But can be useful in relative way which I think that is how he intended them to be.
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Old 06-19-2016, 06:17 PM   #34
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Just an observation in passing...

It's only ("only") 55 dB on the floor of my Interstate toward the cab. I know this because I spent quite some time on my hands and knees templating for a weatherproof overlay mat. We invested in a wonderful custom cab carpeting job and a few months ago, but it's getting soiled by muddy feet because there's no overlay yet. And there is none that can be bought off the shelf for the T1N Interstate so today was the day that the templating finally got done.

In contrast to the measurements in post #32 above, I could handle 55 dB (for comparison, my stick house is 41 dB with the central A/C running and the air whistling through the registers, but remember it's not a linear scale). Which means that if I were traveling alone and forced to sleep with the A/C running, I might be inclined to throw my 4-season Thermarest on the floor and sleep there instead of the bed. Cooler air settles, so it was actually quite nice down there, all things considered.
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Old 05-31-2017, 08:16 PM   #35
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I'm just about wetting my pants with excitement... yesterday, the FitRV Instagrammed a pic of James and a delivery guy carrying a new-in-box air conditioning unit up their driveway, for their Travato. If anyone is capable of figuring out how to resolve this loudness thing, it would be James. I know I'm not the only one who is waiting for the installation and their verdict on what kind of improvement this achieves.

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Old 05-31-2017, 10:06 PM   #36
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yesterday, the FitRV Instagrammed a pic of James and a delivery guy carrying a new-in-box air conditioning unit up their driveway, for their Travato.
If I were a betting man, I'd put money on it also being a DC unit....
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Old 05-31-2017, 11:30 PM   #37
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If I were a betting man, I'd put money on it also being a DC unit....
If you look at the box closely, it's a Dometic Penguin II. Doesn't look anything special to me, just low profile with a heat strip, and is 115V.
https://www.dometic.com/en-us/us/pro...uin-ii-_-20669
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Old 05-31-2017, 11:34 PM   #38
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If you look at the box closely, it's a Dometic Penguin II. Doesn't look anything special to me, just low profile with a heat strip, and is 115V.

https://www.dometic.com/en-us/us/pro...uin-ii-_-20669


Well that's disappointing. Seems James was keen on moving away from relying on the grid so I guess I don't see the point.....
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Old 06-01-2017, 12:55 AM   #39
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Our FC has the "new" ducted air and if it's quieter that the older non-ducted I feel sorry for those without the new air. Ours is very loud. Not just fan noise, but sounds like it is vibrating against the roof. When the heat pump comes on, it adds a groaning sound. Both a/c's were replaced under warranty because they quit cooling and I swear that the replacement units are louder than the originals.

One positive is that Joan says she can't hear my "alledged" snoring with the units on.
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Old 06-01-2017, 06:07 AM   #40
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If you look at the box closely, it's a Dometic Penguin II. Doesn't look anything special to me, just low profile with a heat strip, and is 115V....[/url]
Oh, you're right - I see the box now. His logic isn't yet apparent to me - yes he has been moving to off-grid capacity, so I assumed this would be a mod-in-kind. I guess his reasons will become apparent soon enough.

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Old 06-20-2017, 08:13 AM   #41
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Brief anecdote:

Our stick-and-brick air conditioning unit threw either a blower fin or a weight yesterday - we won't know until a contractor disembowels it hopefully later today - but think United Airlines Flight 232 which threw a fan blade in 1989 and crash-landed in Sioux City Iowa. Ka-POW! Plenty of mechanical drama associated with these kinds of catastrophic failures.

Anyway I suggested to my husband that we go get the Interstate and park it in our driveway on shore power because obviously we can't survive in Houston at this time of year without air conditioning - not with the way that current houses were designed around an obligatory central a/c paradigm (i.e., there's no backup means of air circulation, so no way to modulate the oven-like effect).

He decided we'd be better off hooking up a free-standing portable unit that we'd been using in our garage, thus cooling whichever room we're in at the time. Which we did, but the little sucker is LOUD. As in, 62 dB (I just measured it), compared to the Interstate's overhead unit which I previously measured at 63 dB. So we gain nothing in the way of noise relief with this solution.

My point in mentioning this is, one would think that there'd be much more demand for residential portable units than for roof-mounted RV units. And yet nobody seems to have solved this noise issue at the residential level either. My free-stander is several years old, but even the newer ones I've heard are not appreciably better.
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