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Old 11-04-2009, 06:25 AM   #106
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"Defogging" double-pane windows .... a gimmick??


I might have a source. PM me...

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Old 11-04-2009, 10:31 AM   #107
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"Defogging" double-pane windows .... a gimmick??


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I might have a source. PM me...
Can't PM.

Thanks

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Old 11-04-2009, 10:17 PM   #108
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"Defogging" double-pane windows .... a gimmick??


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Originally Posted by TjbDIY View Post
I currently have 2 holes in my window ( both about 1/8 inch diameter ), one top right, one bottom left. Does anyone think this may work better for such a large window if I open up 2 more holes so I have 1 hole in each of the 4 corners? Maybe open 2 more on each side halfway up also? As it stands right now the window is still well fogged after at least 3 weeks of having the original 2 holes opened.

Any help is very gratefully received. Anyone? Anyone?
Do you have a work horse shop light? I am thinking that the volume of air inside a window that size may not be venting effectively thus leaving the higher humidity values inside the window. I am thinking out loud here, and don't want to cause any damage, but I am thinking that you point a very bright shop light toward the bottom hole. I wouldn't get the light to close to the glass, just aimed at the side and bottom of the window pane. Heating the inside of the pane would 1) cause the air inside to expand and force more air exchange, especially out of the top hole. 2) the heated air would drop the relative humidity and vaporize the remaining condesation, hopefully venting it out the top hole.

Just some thoughts from a meteorologist and former contractor! Good luck.
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Old 11-05-2009, 12:55 AM   #109
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"Defogging" double-pane windows .... a gimmick??


Does anyone have any information as to acquiring the one-way valves? I am wanting to do this myself, and I can't find where to get them.

Thanks!
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Old 11-08-2009, 10:08 PM   #110
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"Defogging" double-pane windows .... a gimmick??


Anyone? Still have had no luck locating and kind of valve.

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Old 11-09-2009, 06:16 AM   #111
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"Defogging" double-pane windows .... a gimmick??


Again:
I might have a source. PM me...
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Old 11-11-2009, 09:51 PM   #112
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"Defogging" double-pane windows .... a gimmick??


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Originally Posted by ccarlisle View Post
Again:
I might have a source. PM me...
Ok, will do.

Last edited by matthewb; 11-12-2009 at 09:04 AM.
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Old 11-12-2009, 01:15 AM   #113
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"Defogging" double-pane windows .... a gimmick??


I haven't tried it yet, but I believe a window could be quickly defogged by filling a small cylinder (about 1" diameter by 6" long) with silica gel and attaching tubing to each end. Insert one end of the tubing into one of the holes in the glass and supply air to the other end of the cylinder. A small air compressor or manual pump could be used. A simple squeeze bulb could also be used, but it would need to be disconnected for refilling each time. BE CAREFUL TO NOT OVER PRESSURIZE THE SPACE BETWEEN THE GLASS. Even a small pressure will exert a large force on the large area of glass. Some filter material, such as cotton, should be placed in the downstream end of the cylinder to prevent any of the silica gel from being expelled. All moisture will be removed from the supply air, and the very dry air should remove the moisture from the window. Silica gel can usually be purchased at a crafts store. "Indicating" large-grain silica gel is best so you can tell when it is saturated with moisture. The indicating material usually changes color from blue to pink as it picks up moisture. The saturated silica gel can be regenerated by drying in a microwave oven.
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Old 11-13-2009, 10:56 AM   #114
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"Defogging" double-pane windows .... a gimmick??


Hi All,
I've been searching for valves and sieves companies for awhile and I came up with this one, Defogsupplies but they are a bit pricey. They sell the 1/2" valves in cards of 25 for $150 and the sieves for $112.50. Don't know anything else about the company (good or bad) so you're on your own.
I'll continue my search. Good Luck.
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Old 11-14-2009, 09:18 PM   #115
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"Defogging" double-pane windows .... a gimmick??


While it's true that some companies are having some success "removing the fog" out of leaking IGU's. they will tell you that only 50% of the glass units they run into can be cleaned up and if it's etched with mineral deposits from the condensation you are out of luck.

Glass breakage while drilling, repeat visits for second applications, etc. are commonplace I am told by a franchisor. While I was intrigued enough to research the process, I decided that I would stay the course and replace a bad IGU instead.

A qualified glazing contractor can replace the glass unit for much less than replacing the window and give you a 10 year warranty on the IGU and a longer warranty period on a ETCC glass unit to boot.

While you can experiment with one way valves to let the moisture escape. it seems to me that a new glass unit will win hands down, while looking and performing better than the "defogging" method.
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Old 11-15-2009, 09:44 AM   #116
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"Defogging" double-pane windows .... a gimmick??


"ETCC glass unit"

Define that for us.

So let me understand: you're saying that the inside surfaces of an IGU become etched (with acid rain, I presume) and can't be cleaned? How does the acid water or vapour get in there in sufficient amount to etch glass?

Mineral deposits come from hard water...Why wouldn't mineral deposits be removable? are they resistant to acids where you are? I know it would be difficult, especially in IGUs but that doesn't mean they're permanent.

Sure a $500 IGU would look better than a $125 visit from a defogger but not everyone has the same standards. That's why dollar stores exist and why they still make Rolls-Royce cars to move people from A to B...

"Chacun a son gout" as they say in German.
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Old 11-15-2009, 05:58 PM   #117
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"Defogging" double-pane windows .... a gimmick??


What I am saying ccarlisle is, the residue left from the moisture in IGU's dries and bakes in the sun. You will notice a whitish looking stain on surface 2 or 3 or both. This residue which is deposits in the moisture cannot be removed by the defogging method. The main reason is they cook inside the glass unit and get crusty, nevermind the damage it also causes the glass surface. It is my understanding that the success rate of defogging the IGU depends on when you apply it. If you draw the drapes and wait too long the technology doesn't work. It also, in my estimation, will not work if one of the pieces of glass delaminates from the spacer which happens all the time. Can you clean it off? One company has a little magnet and they stick a scraping tool in the IGU and you move it with an exterior magnet on surface 1 or 4 and it gets some of it off. It's the same as cleaning an aquarium interior surface with that sponge magnet deal. Those of you that ever had or has an aquaruim know what I mean.

It's not a question of dollar store vs Macey's or Rolls Royce vs Carolla. It's a question of the right thing to do vs the wrong thing to do for a particular application. I don't think "Chacun a son gout" is the deal. It is not a matter of personal preference. It's a matter of what is going to work over the long haul.

By the way, ETCC is Energy Tax Credit Compliant glass. This glass has a SHGC of.30 or less and a Ufactor of .30 or less.

Last edited by fixawindow.com; 11-15-2009 at 06:12 PM. Reason: typo
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Old 11-15-2009, 06:21 PM   #118
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"Defogging" double-pane windows .... a gimmick??


OK, fixawindow, I hear ya! The whitish mineral salts are calcium and magnesium salts from hard water vapour that leaks into the IGU around the spacers. We have only slightly hard water up here so we don't see that problem as much and even if we did, it would be hard to dissolve them. How did they get those magnetic sponges into the IGU?

Boy, a lot of people would be broke if the "right thing to do" was the only criteria for doing something. Sure wearing a $1000 Georgio Armani suit is -in some circles - the "right" thing to do but nowhere is there any definition of the "right thing". This isn't wiring an electrical panel, or plumbing a gas water heater - this is making a choice between a $125 item and a $500 item. Every man has his thing, and hopefully all we can do is educate the buyer into the choices that are out there.

If I bring up all the disadvantages to doing a defogging job and all the advantages of replacing the complete IGU or window, then present the $$ involved, I'd still get alot of business.

My analogy about the cars was just that: I can present all the advantages of driving to your mother-in-laws Sunday dinner in $140,000 Silver Shadow, and then the disadvantages of going in a Rambler and my Rambler would still be used. No accounting for taste! LOL

You seem to have good knowledge on all this; hope you'll stick around!

PS: Thanks for the "ETCC" clarification; don't know if we have the same thing up here.
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Old 11-15-2009, 06:24 PM   #119
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"Defogging" double-pane windows .... a gimmick??


I think its also a matter of what people can afford to do
I've replaced all of our windows in the past 5 years
But if I was faced with doing that today I would have to pass/postpone as not affordable right now
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Old 11-15-2009, 09:07 PM   #120
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"Defogging" double-pane windows .... a gimmick??


Replacement glass is affordable. It will last a minimum of ten years and longer if you buy a quality IGU and have it installed by a quality reglazing company. There are plenty of ways to save money on glass repair. Just like there are many ways to get a 1000.00 suit for 199.00. A Silver Shadow to Rambler would be a good analogy if we were talking about glass replacement or a new top of the line Marvin window. We are talking about used tires or new tires for your Rambler. new tires will last longer and probably be a better value. The right thing to do isn't always a have or have not issue. It isn't always an affordable or not affordable issue either. It usually is about getting the right information to make a good decision

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