Super Insulating Windows For San Antonio Homes
Understanding the whole Concepts behind super insulating windows
Super insulating windows are such that help to reduce energy bills basically in two (2) ways. Firstly, they could reduce cooling and heating by gradually reducing the rate of conducted heat through the window and also the amount of leaked heat around the windows tagged “air infiltration”.
The factors or properties that define the ability of windows to block or slow down the rate at which heat flows through them are; the inverse metric or U-factor, and R-value. The R-value defines the Thermal Resistance of insulation materials. It is usually used to depict the thermal resistance of all insulation materials like foam and fiberglass. The fact about R-value is that, the level of the R-value is directly proportional to the efficiency of the window at keeping the heat out in the summer period and keeping the heat in during winter period. For example, the R-value for a dual pane window that has a low-e coating was approximately given as R-3. Also, the R-value of an energy-efficient window with a high-performance was approximately given to be between R-4.8 and R-11.
The ability of windows to hold on to heat by reducing the leakage of air through gaps in and around the windows is said to be its Air Infiltration. It is normally measured in cubic feet of per minute air (cfm/ft²). The air infiltration is directly proportional to the amount of the leaked air. This means that in the real sense, the lower air infiltration becomes, the lesser the amount of leaked air (out or in). The approximate air infiltration value for ordinary replacement windows is 0.3 cfm/ft2. Meanwhile, high performance windows have an approximate air infiltration value that is 0.01 cfm/ft2 thereby, allowing approximately ninety five percent (95%) less air which passes around the window and through window.
Modeling the Difference
An engineering team tried to quantify the energy savings (incremental) that is being realized by lowering the windows air infiltration and the improvement of R-value at a top producer of windows that are energy efficient. All these were done so as to model the rate of gas (natural) consumption for the heating of multi-family residential buildings. The first development modeled an average, low R-value, existing residential houses with single-pane, and windows that have high air infiltration . In the second development, the model represents that same building but it was with high resistance (R-value) windows that still has high air infiltration. Lastly, the third development modeled the building that has low infiltration windows and also has high R-value. Each of these developments was typically modeled in three (3) dissimilar heating dominated climates.
Those results of the modeled instances show that each of the developments, upgrading from low resistance value (R-value) to high resistance value (R-value) saved twenty six percent (26%) on the consumption of natural gas. The savings further increased between thirty six percent (36%) and thirty eight percent (38%) with the extra improvement of air infiltration (low) when likened to the baseline development. Therefore this results in the enhancement in the performance of air infiltration that generated an additional 10% to12% savings on the top of the saving that is being generated by the improvement by the value of the window insulation.
In summary, the energy efficient windows could reduce your heat or energy bills in some complimentary ways. Firstly, it could be by simply reducing air infiltration, and secondly, it could be by improving insulation. Increasing the resistance value (R-value or R-factor) of windows in one existing multi-family house could reduce power or energy consumption by twenty six percent (26%) in a heating-dominated climate, which is based on the constructed models for the purpose of simulating this effect.