Comfort in all types of weather.
Who says you can’t do anything about the weather? Cardinal's LoĒ² coated glass delivers year-round comfort in all types of weather. In summer, it rejects the sun’s heat and damaging UV rays. In winter, it reflects heat back into the room.
Cardinal LoĒ² glass includes two variations, LoĒ²-272 and LoĒ²-270. LoĒ²-272 offers a little more light transmittance, while LoĒ²-270 gives a little more solar control.
Regardless of where your home is located, choosing windows that provide you with the highest level of comfort and energy savings year-round is extremely important. And choosing the right glass for your windows is the most important factor in that decision. Go beyond ordinary low-e glass. Let LoĒ² glass help you handle the weather – any weather.
Hot sun? Cool windows.
Frigid outside, cozy inside.
Inside glass and outside temperatures.
VERY COLD OUTSIDE
VERY COLD OUTSIDE
Glass so smart, it controls your comfort.
Heat/Cool portion of your energy bill:DOE estimates that in 2005 the average house spent $2,003 on utilities and that 43% of this total ($886) is for heating and cooling energy. (http://buildingsdatabook.eren.doe.gov/TableView.aspx?table=2.3.10).
Savings values are average of multiple locations within climate zone.
“Average” house as described in the Buildings Data Book at http://buildingsdatabook.eren.doe.gov/TableView.aspx?table=2.2.7 The model house is described as a mid-1970’s single-story dwelling with natural gas furnace, central air-conditioning, adequate insulation, and double-pane windows.
Window orientation set as uniformly distributed on all sides to represent a neighborhood average and the total window area set to 15% of the floor area.
Interior shading devices are presumed to be closed 50% of the time throughout the year.
“Fixed Thermostat” conditions are 70°F for heating and 75°F for cooling.
“Equal Comfort” thermostat settings determined using window thermal comfort research from the University of California at Berkeley (http://www.cbe.berkeley.edu/research/pdf_files/SR_NFRC2006_FinalReport.pdf). The existing double-pane windows used heat/cool thermostat setpoints of 72°F/74°F to match the comfort of LoĒ²-270 glass at 70°F/78°F.
House heat/cool energy simulations used the Resfen program from Lawrence Berkeley National Lab (http://windows.lbl.gov/software/resfen/resfen.html).
All values calculated using Window 7.4. (See http://windows.lbl.gov/software/default.htm and http://windows.lbl.gov/materials/optical_data/default.htm for more information on glass optical data and the Window 7.4 program.) Emittance of ordinary (pyrolitic) low-E is 0.16.
Solar Heat Gain Coefficient – (SHGC):
The amount of solar radiation that enters a building as heat. The lower the number, the better the glazing is at preventing solar gain.
The UV Transmittance is determined as an average for wavelengths 300 -380 nm. UV Damage Weighted Transmittance (Tdw) is the weighted average for wavelengths 300 – 780 nm (based on CIE 89/3). This region includes all of the ultraviolet energy and part of the visible spectrum, and will give the best representation of relative fading rates. The lower the number, the better the glass is for reducing fading potential of carpets and interior furnishings.
This represents the heat flow rate through a window expressed in BTU/hr·ft²·°F, using winter night weather conditions of 0°F outside and 70°F inside. The smaller the number, the better the window system is at reducing heat loss.
Cardinal actively supports and participates in the National Fenestration Rating Council (NFRC). Windows with LoĒ² that are rated and certified by the NFRC can comply with Energy Star™ requirements in all regions of the country. Northern zone will likely require the addition of LoĒ-i89 on the 4th surface to comply with U-Factor requirements.
(See https://www.energystar.gov/index.cfm?fuseaction=find_a_product.showProductGroup&pgw_code=WI for more information on the Energy Star windows program.)
The difference is clear.
Cardinal LoĒ² glass is ideal for all weather conditions in most climates. In summer, its patented coating blocks 86% of the sun’s harmful ultraviolet rays and 63% of the sun’s heat. It even outperforms the tinted glass often used in warm climates. You can see out and the light shines in, with no heavy bronze or smoke colored tints to darken the personality of your home. In winter, it reflects heat back into rooms.
LoĒ² glass can also be purchased in hurricane-resistant laminated glass and in a variety of shapes and sizes.
To learn more about LoĒ² and other Cardinal glass products, ask your window manufacturer, contractor or architect.
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