Solar Heat Gain

Heat transfer always occurs from a higher temperature object to a cooler temperature object so on a sunny day heat from the sun travels from the outside of your house to the indoors. Solar Heat Gain (scientist call it a Solar Heat Gain Coefficient) measures heat transfer caused by radiation.

Radiation

Energy is transferred through empty space.



Our Window’s Defense Against Radiation

Low - E glass coatings that reflects radiant heat back toward its source.
  • Our HP Max Glass has multi-layer defense against radiation:
    • First Barrier
    • Metal Oxide
    • Silver
    • Second Barrier
    • Metal Oxide
    • Silver
    • Metal Oxide
    • Third Barrier

Solar Heat Gain Numbers

The Solar Heat Gain number measures how much heat is transferred through your entire window from the sun. The lower the number the better in the summer. However, in northern climates, a higher number is better in the winter allowing the sun to help heat your home. Adding multiple layers of low-e coating will reduce the Solar Heat Gain. The number is a percentage. So a Solar Heat Gain of .28 means only 28% of the sun’s heat is entering your home. Beware of window companies that measure the center of the glass. These numbers will be lower but you are not buying just the center of the glass, you are buying an entire window. Our numbers represent the entire window.

Low-E Glass Helps in the Winter Too

Radiant heat is not only generated from the sun, it is also generated from your furnace. Low-E glass coatings will help trap that radiant heat inside your home in the winter. Low-E glass keeps your home cooler in the summer and warmer in the winter.

New Replacement Windows - Windows Indianapolis IN
Your house replacement windows should be the best replacement window on the market.  Good replacement window reviews are hard to find.  ReplaceSmart recommends basing your decision on The National Fenestration Rating Council’s (NFRC) certified numbers and how much the window costs.  Sometimes that can be harder than it sounds as some companies require you to let them come out to your home to get window prices.  And even then, you usually don’t end up with a cost per window or a price per window broken out by material and labor.  Many time they don’t give you the NFRC numbers for each replacement window either.  They like to group it all together.  That usually means they are hiding something.  Always get detailed numbers before you buy.  Andersen windows and doors (or Anderson Windows Doors) are not the most insulating window made as per the NFRC published u-values.  Anderson window repair or Andersen window repair can be costly as compared to new windows from ReplaceSmart.  Even window sash replacement or a replacement window sash can be more costly than new replacement windows.  Anderson Windows and Doors, many times referred to as Anderson Doors and Windows or Anderson Doors Windows is correctly spelled Andersen Windows.  Renewal by Andersen is Andersen Windows replacements cost center.  They usually do not provide window prices without a visit to your home unlike ReplaceSmart.  ReplaceSmart provides window replacement service; we replace glass windows and offer replacement window installation.  This is all referred to by some as replacement windows installation.