Saturday, January 15, 2005

Energy Ratings & Door Glazing

After getting nearly all the data for the building fabric into the Energy Rating software (First Rate 4.0), it seems we have to add some more glazing to the information. A door with glazing in it must be considered as both a window and a door -- so the glazing area for the glass in and around the door has to be included, and the door must also be counted as a "door", unless the door is nearly all glazing (so glazed sliding doors, and French doors need not be included in the count of external doors, but the glazing must be entered as a window). This additional glazing has caused the rating to drop a few points, from around 0 to around -4. This still gives us a 4-Star Rating, which should be sufficient, as we are including rain-water re-cycling in the design.

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