Calculate how much money you will save by using ClearComfort on your windows
Building physicists describe the thermal transmittance of a material using the term 'U-value'.

U-value is measured in watts per square meter per degree Celsius. Ordinary clear window glass 4mm thick has a U-value of 5.5. When treated with the ClearComfort membrane it is 3.6. This is a 35% reduction in the amount of heat that will be transmitted through the window.

This represents a saving of almost 2 watts per degree of difference between the internal and external temperatures. For example, with the external temperature of 0°C and your family room heated to 20°C, the difference is 20 degrees; thus your heat saving is 40 watts for each square meter of glazing in the room.

If your room has a glass area of 10 square metres, the difference between heating the room with ClearComfort treated windows and with untreated windows is the equivalent of running an extra 400 Watt heater. Multiply this by the number of rooms that you heat in winter, and you can quickly see for yourself the difference that ClearComfort membrane will make to your energy bills.

How much greenhouse gas will you save?
How much CO2 will you prevent entering the atmosphere when you use ClearComfort on your windows?

Each kilowatt hour (kWh) saved prevents 1 kg of CO2 from entering the atmosphere. So by using the ClearComfort insulation system you will reduce your space heating or cooling requirements by the equivalent of one 200 Watt heater in each room, thus sparing the atmosphere, on average, an extra 1,000 kg of CO2 each year.

A precise calculation of heat transfer
If you are serious about building physics you can apply this formula to calculate precisely how much heat is transferred through your own windows:
Q = A x U x T
Q represents heat lost or flux in units of Watts, or Joules per second;
A represents the area of glass in your room in units of square metres;
U represents transmittance of the glass in units of Watts per square metre per degree centigrade;
T represents the difference in air temperature on each side of the window in units of centigrade degrees.

When you have calculated the Q value, or heat transfer, you can then calculate the dollar value of the energy you are using to heat or cool your room by applying the Q value to this second formula:
S = [Q/E] x [K/100,000]
S represents dollars per hour
E represents the efficiency of your heating appliance as a percentage (typically 40% or less)
K represents the fuel cost charged to the consumer by the supplier, in units of cents per kWh for electricity or cents per megajoule (MJ) for gas

Working these calculations with accurate measurements for each hour of the day that you are heating or cooling your house, and adding the figures over the year, will give you the annual energy consumption and energy cost for your household. Repeat the calculations using the U value of windows with ClearComfort installed, and the difference in the two annual figures will demonstrate precisely the difference in energy lost and dollars saved.