Even NEW Windows have POOR Energy Performance
Inflector Solar Window Insulation – Stops 80 to 90% of heat, all seasons*

71% of electricity in U.S. is used in buildings.
Almost half that is for HVAC (heating, ventilation, and air conditioning).

Heat passing through windows as radiation = up to 75%

A third of residential HVAC goes through windows on average.  More for offices.

Radiation = 70 to 75% of Window Heat

New windows do little to control heat, particularly radiation heat.

”Energy Efficient” Windows – Not very efficient

Window coverings absorb heat, then re-radiate it. They do not control window heat.

    Dark tints absorb heat


Reflective coatings vary,
help in only one season.

SOLUTION: Inflector Solar Window Insulation – Prevents more solar heat gain through a single-glazing than a five pane window with a Low-e and air spaces.

* Rejects radiation heat loss in winter and Collects solar heat from windows



“Common knowledge” about improving window performance makes us think of insulation like foamed frames, air and gas filled spaces, and layers of glazing. But standing before a window with the sun shining in soon dispels any notion windows stop heat. Most of us, and even many “experts”, misunderstand the most common source of energy passing through windows. 

Of three ways heat transfer occurs, conduction, convection, and radiation, radiation is the primary source of heat passing through windows. In fact radiation heat, traveling at the speed of light, comprises more than 70% of heat that passes through windows. Like radiation from the sun, heat radiates from all warm surfaces both indoors and out. Other window heat transfer is slow and secondary to radiation, barring significant air leaks. But then air leaks are signs of window failure.

Inflector solar window insulation: Inflector is a high performance radiation heat screen that you can see right through. Its effectiveness has been measured, stopping more heat than five panes of glass with air spaces and low-e, when used with a single pane of glass. It is thoughtfully engineered. Utilizing NASA’s technology for insulating from radiation heat in space, it can direct heat seasonally, unlike any other window or covering. This property provides a unique energy advantage. By simply reversing summer and winter, it can either primarily 1) keep heat out, or 2) retain room heat and even collect the sun’s heat in winter. It can even be mounted to seal windows leaking air, if necessary.

In’flector Installed Left

In’flector Skylight Covers

In’flector Window Demonstration



In’flector Window Insulation – Cut Heating And Cooling Bills Up To 40%

 In’flectors Transmit Visible Light But Reject Radiant IR Wavelengths

 Hot!!  (135ºF) On Inside Surface Of New Double Glazed Vinyl Window....

     Cool!!   Inches Away Inside In’flector, Temperature Is (77ºF)

Why insulate windows? Nearly a third of energy consumed in a residence, on average, goes through windows. Yet windows generally comprise less than 5%** of outdoor temperature-exposed wall and attic surface areas. Window energy consumption is greatly under-appreciated as seen in the Greenhouse Gas Production comparison below.

Radiation heat travels through space without heating anything!!!??? When it hits something it causes it to heat up. Radiation hitting air molecules in the atmosphere either warms them, or refracts or reflects off them, much like light. Radiation that passes through the atmosphere warms the earth’s surfaces. Most radiation hitting windows passes right through. It then heats up surfaces it strikes in the room.
Heat travels from regions of higher energy to those with lower energy (i.e., high to low temperature). Windows protect us from weather, but largely fail to control heat going in and out by heat’s primary transfer mechanism through space, radiation. Radiation, like all heat, passes through windows, both in and out, depending on which region has the lowest energy.
Heat is stored in rooms by warmed materials, in the form of vibrating molecules. Conduction and convection help transport and transfer heat of these vibrating molecules throughout room materials and to other areas of the room. Heated surfaces also emit radiation heat. Cooler conditions outside windows allow radiation heat to travel back out.

“Vehicles are responsible for approximately 20% of U.S. greenhouse gas emissions” – NRDC. 

Windows consume about a third of electricity generated in the U.S.* thus producing approximately 12% of U.S. greenhouse gas emissions (GHG). Considering that most heating uses other fuels (gas, wood, oil, etc.), it can be safely reasoned windows are responsible for substantially more than 12% of GHG, as well as a great deal more energy consumption than just the electricity.

Blinds, shades, or curtains inside a window mostly absorb the heat, warm up, then re-radiate to a cooler area, usually inside the room when it is warm outside.

Darker windows absorb heat, warm up, then re-radiate it, usually into the room on a hot day. A shiny window surface helps reflect some of the radiation heat. Low-e glass coating is designed in different ways to help either gain, or deflect the sun’s radiation for either warm or cool climates.

Sun shades outside windows protect them from sun exposure and weather. They filter some radiation heat. Protecting windows from weather seems counter-intuitive and counter-productive. Windows primarily protect us from weather. Sun shades tend to age quickly from UV and corrosion.


A thermal solar collector absorbs radiation heat then uses transfer fluid as a coolant to store the heat by circulating it to a storage tank. Convected air can also be used to transfer heat.

Inflector solar window insulation works with window glass to stop 80 to 90% of radiation heat, year round. Performance rivals or exceeds the best available windows or even window insulation. Yet you can see through it. Inflector can address seasonal heating and cooling requirements by reversing it, keeping radiation heat out in summer and in during winter. Inflector’s back is black. So it absorbs radiation heat from outdoors, producing more heat on a 4’x 4’ window in full sun than a 600W heater.

*Buildings consume more than 70% of all electricity generated in the U.S. Windows are responsible for approximately 45% of that electricity.

**EPA estimates windows comprise 15% of exterior wall surface on average yet they are responsible 25% to 35% of heating and cooling energy consumption. When attics are included windows comprise less than 5% of the weather exposed surface.


In’flector’s provide an infra-red barrier between your window and your room that keeps summer heat out, but allows light to pass. They reverse to retain heat lost from your windows in winter, greatly improving comfort and efficiency on the part of your building that loses and gains the greatest amount of detrimental energy - your windows, without hiding your view.

1                            2
Radiation Heat Goes Through Windows                                 Inflector Stop 80 to 90% of Radiation Heat

Link to In’flectors website:

Conserving energy is your first and best investment for lowering your energy bill. Make sure you have enough insulation, seal up cracks in your house for utility penetrations, windows, and doors and find any gaps left during construction and fill them, too. Have your home tested with a blower door or other energy loss detecting methods if you feel there are hot and cold spots.

In’flector radiant barriers on your windows not only help control heat gain and loss, they also cut infiltration from leaky windows. They will actually outperform new windows in energy savings. See why we are excited about this effective new product line that will increase your comfort and provide long term cost savings.





Clear southern exposure, preferably for at least five hours per day. Deciduous trees which lose leaves in autumn are O.K., if the sun shines on the collectors in summer. Protected mounting location for solar collector or collectors about the size of a plywood sheet. Hot water storage. Existing tank, or additional tank(s) are O.K. Use hot water regularly. In freezing climates, frost protection is required for the exposed solar collectors and piping. AC pumps are usually less than about 1/10HP, so 110V AC with standard 3 wire plug is common. A solar controller is usually included that measures temperature on the collectors and in the tank then turns the system on or off depending on the temperature differential. DC pumps can also be used, and are typically run with a photovoltaic panel


Flat Plate Collectors from AET
Flat Plate Collectors from Solene
Skyline Flat Plate Collectors
Evacuated Tube Collectors from Solar Panels Plus


Department of Energy
North Carolina Solar Center
Texas State Energy Conservation Office