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  1. #1
    Join Date
    Oct 2005
    Location
    Omaha, NE
    Posts
    309
    As a follow-up note, We have a 2 story-home with many windows facing WEST.

    We tinted all of the WEST windows with 60-80% blockage.

    Wow, what a difference!
    Electricity bill went down 25%:

    June 2005: $230 (avergae 90-100 deg F)
    June 2006: $180 (everage 95-105 deg F)

    I strongly recommend Tinting windows, especially those facing WEST.

  2. #2
    Join Date
    Mar 2004
    Location
    Vancouver, BC
    Posts
    125

    Tinting vs exterior shading

    While tinting can work- the direct solar gain onto the outside surface of the tinted glass can heat stress the glass as well as contribute to increased radiant heat gains to the interior surface of the window. While the tint will reduce the total solar heat gain through the glass to the indoors by say 60%-70% depending on the heaviness of the tint, you gain back about 30% from the absorbed solar heat in the glass, so you only really get a NET reduction of 30%-40% of the solar heat gains to the inside of the room.

    It's still a good thing, but nothing beats an exterior shading device (overhang, trellis, exterior venetians, etc.) that keeps the direct solar gain from hitting the glass in the first place. An ideal situation would be to have some exterior shade that keeps most of the summer direct sunlight out, while allowing most of the lower winter sun angles IN, and you can get away with clear glass for best daylighting and views.

  3. #3
    Join Date
    Feb 2003
    Location
    Huntsville,AL
    Posts
    4,125
    how is your comfort?

    what were the DegreeDays for ea billing period?
    be sure that it wasn't just that 2nd month was milder as is measured by DD.
    harvest rainwater,make SHADE,R75/50/30= roof/wall/floor, use HVAC mastic,caulk all wall seams!

  4. #4
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,273
    Originally posted by cn
    We tinted all of the WEST windows with 60-80% blockage. Wow, what a difference!
    Electricity bill went down 25%:

    I strongly recommend Tinting windows, especially those facing WEST.
    CN,

    THANK YOU VERY MUCH
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  5. #5
    Join Date
    Sep 2004
    Posts
    522
    Tinted mine and loving it.

  6. #6
    Join Date
    Apr 2005
    Location
    illinois
    Posts
    257
    We have had good luck using an exterior solar screen on our west facing skylights. http://www.newcoproducts.bc.ca/solarshade.htm is one of many that sell this stuff.
    It provides shade without heating the window glass. You can see through it and you can remove it if you wish.

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