glass replacement for air cooled hood

[darkhollo]

I bought a Sun Systems hood/reflector from HID hut, shipped it to a safe addy and then they reshipped to me.

When it arrived it was clearly broken (shattered glass sound) It was just the glass cover that was broken and I didn't want to open in front of the delivery guy. I just took my lumps and now i'm search of a replacement.

So here is my real question.. is this a special type of glass that can take the heat? What should I be looking for in replacement glass?

-dh

 

[Mr. Bongjangles]

It is "tempered glass" aka safety glass.

Apparently it is hard to re-work/re-size once strengthened, so you may want to get a replacement from Sunlight Supply or their distributor, as I doubt local glass places will have the proper size or be able to cut one for you economically.

Smart move to not open the reflector with the delivery guy there!

Here's some random info on tempered glass:

Tempered glass is one of two kinds of safety glass regularly used in applications in which standard glass could pose a potential danger. Tempered glass is four to five times stronger than standard glass and does not break into sharp shards when it fails. Tempered glass is manufactured through a process of extreme heating and rapid cooling, making it harder than normal glass.

The brittle nature of tempered glass causes it to shatter into small oval-shaped pebbles when broken. This eliminates the danger of sharp edges. Due to this property, along with its strength, tempered glass is often referred to as safety glass.

The thermal process that cures tempered glass also makes it heat resistant. Tempered glass is used to make the carafes in automatic coffee makers and the windows in ovens. Computer screens, skylights, door windows, tub enclosures and shower doors are more examples of places you will find tempered glass. Building codes also require the windows of many public structures to be made of tempered glass.

Automobiles use a different type of safety glass for the windshield and tempered glass for the back and side windows. Windshields are made from laminated glass, which sandwiches a sheet of plastic between two panels of glass. When the windshield breaks, the glass panels stick to the plastic film, rather than falling away to possibly injure the driver or other passengers.

Tempered glass breaks in a unique way. If any part of the glass fails, the entire panel shatters at once. This distinguishes it from normal glass, which might experience a small crack or localized breakage from an isolated impact. Tempered glass might also fail long after the event that caused the failure. Stresses continue to play until the defect erupts, triggering breakage of the entire panel.

In recent years, acrylic has replaced tempered glass in many applications in which heat is not a factor. Acrylic is 20 times more impact resistant than glass and does not shatter like tempered glass. Instead, acrylic dents if the impact is strong enough. If the force is sufficient to cause acrylic to fail, it will crack without shattering.

Acrylic is also half the weight of glass and has many other advantages. However, it is flammable. Therefore, you won’t find an acrylic coffee carafe or oven door.

 

[SomeGuy]

I'd call the local glass company and at least price a replacement, might be cheaper than having a new one shipped in and going through the safe addy thing again. They'll have it cut to size and shipped in with their next delivery and its no big deal really. If they ask what its for tell them it goes in a door as all door glass must be tempered by law.

Just make sure you give yourself "wiggle room" on the dimensions as once you get it, it cannot be cut again.

 

[darkhollo]

Now the glass that came out of the box was NOT tempered.. it had some of the most dagger shaped pieces i've seen from a glass break.

I guess assuming I got with non-safety glass, is there anything special coatings I need to stay away from as to ensure I do not reduce my light?

I will just buy local, the safe addy thing hassle/ etc.

Yeah the delivery guy is like "Oh i know this one is broken, let's send it back.."
i was thinking to myself -> Oh yeah my friend will love that!

He really wanted to open it. I just said it wasn't worth the trouble, it's just a cheap glass sheet for a shop light, I'll just get one locally, you know how FedEx is with insurance claims and such. I'll be in the dark forever!! hahahah we laughed and he left. But at first he was pretty persistent!

-dh

 

[Headless Hornet]

I use double strength window glass in my diy shielded hood. The glass touches a 250 Watt bulb and I've had no problems.

I once tried single strength glass and it cracked from the heat.

Mi dos centavos...

 

[SomeGuy]

Just tell em you want clear glass.

I have Bloomwright hoods and they came with tempered.

 

[Stealthy]

Now the glass that came out of the box was NOT tempered.. it had some of the most dagger shaped pieces i've seen from a glass break.

That's strange. I thought Sunlight Supply hoods were shipped with "tempered" glass. It shouldn't have broke the way it did. Have you contacted Sunlight Supply AND the seller to explain this issue and ask why they sent you a dangerous glass insert?

 

[bobblehead]

Ummm... LOWES? They have a glass cutting station, just take in your measurements. Probably your cheapest bet. That's if you don't just get a replacement from SS.

 

[Den0ts]

Contact HID Hut with the problem and see if they can get you another one. They might charge you but it will be an exact replacement and probably cheaper than someone will custom cut it for.