We just had our windows installed Thursday on the new house. I took a picture of the tag on the window to see if anybody knew what they stood for, and if they are good, average, or low. Any help is appreciated!
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What do these numbers mean on my windows?
- Thread starter Chris_H
- Start date
U-Factor measures how well a product prevents heat from
escaping a home or building. U-Factor ratings generally fall
between 0.20 and 1.20. The lower the U-Factor, the better
a product is at keeping heat in. U-Factor is particularly
important during the winter heating season.
Solar Heat Gain Coefficient (SHGC) measures how well a
product blocks heat from the sun. SHGC is expressed as a
number between 0 and 1. The lower the SHGC, the better
a product is at blocking unwanted heat gain. Blocking solar
heat gain is particularly important during the summer
cooling season.
Visible Transmittance (VT) measures how much light
comes through a product. VT is expressed as a number
between 0 and 1. The higher the VT, the higher the
potential for daylighting.
escaping a home or building. U-Factor ratings generally fall
between 0.20 and 1.20. The lower the U-Factor, the better
a product is at keeping heat in. U-Factor is particularly
important during the winter heating season.
Solar Heat Gain Coefficient (SHGC) measures how well a
product blocks heat from the sun. SHGC is expressed as a
number between 0 and 1. The lower the SHGC, the better
a product is at blocking unwanted heat gain. Blocking solar
heat gain is particularly important during the summer
cooling season.
Visible Transmittance (VT) measures how much light
comes through a product. VT is expressed as a number
between 0 and 1. The higher the VT, the higher the
potential for daylighting.
yeah those are good numbers.....it has to do with the "Energy Code"....similar to the "Building Code"
Those numbers indicate each window is chipped and pulley'd.
Sweet, thanks guys! :thumbsup: We have bene talking about having the windows tinted too, just for a little added help. It can get kind of warm in the summer :burn:
DON'T TINT THE WINDOWS!!!! at least before talking with the manufacturer. They will immediately void your warrany. The tinting can create heat within the window (which is filled with a "Low E" gas - argon i believe)....the seals are not designed for the added heat.
just talk to the manufacturer before you do it....they can give you a good explanation.
just talk to the manufacturer before you do it....they can give you a good explanation.
RidnRodsLightng said:
Agreed. You can get room darkener shades instead. They come manufactured with foil linings.
05 Roush said:
Hes right youve got a .37lb upper.
And a .33 lb lower. 
Actually, it seems like a clear indicator that Cali has waaaay too much bull$h!t going on.
NotoriousJaegs said:Actually, it seems like a clear indicator that Cali has waaaay too much bull$h!t going on.
Amazing, huh. The rest of the country has to comply via proxy with California law.
05 Roush said:And a .33 lb lower.
Talk about over revving an engine.
That was my first thought when I saw the stickers. Amazing how they have an affect on the rest of the US. I'll definitely give the manufacturer a call prior to doing the windows. I didn't even think about that. :read:NotoriousJaegs said:Actually, it seems like a clear indicator that Cali has waaaay too much bull$h!t going on.
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