In the spring of 2000, two identical new homes were purchased from a local production builder in a bedroom community near Sacramento, California. Both homes came equipped with clear double glass. After a series of careful measurements to ensure the houses were really identical, all the glass in one home was replaced with high-performance, low solar gain, low-emmissivity (LSLE) glass. During July of 2001, the air-conditioning system in the house with LSLE was downsized by one ton (from 12.3 kW to 8.8 kW, or a 3.5 kW reduction) to demonstrate the real cooling load savings from the glass. The two unoccupied homes were kept comfortable and monitored with extensive hourly data for over a year to document the energy and peak demand savings from the high-efficiency glass. The house with LSLE glazing and reduced air-conditioning capacity met the cooling load and saved 25% of the cooling kWh and over one-third of the air-conditioning system peak demand (1.8 kW less) compared to the house with clear double glazing.
Citation: Thermal Performance of Exterior Envelopes of Whole Buildings IX
Product Details
- Published:
- 2004
- Number of Pages:
- 9
- File Size:
- 1 file , 5.7 MB
- Product Code(s):
- D-BldgsIX129
