Vinyl Window R Value

The r value as it is known to most consumers is really an inverse representation of the u value.

Vinyl window r value.

We ve designed the entire window including the frame and sash to perform at its best. Since the different parts of a window all have different u factors. Alside vinyl windows have several replacement and new construction lines including double hung casement and bay windows. Better windows have high r values and low u factors see table 1.

The higher the r value the greater the insulation performance. Our windows and doors are engineered for energy efficiency. Optional foam insulation can further increase energy performance. Ultimately when talking about windows the u and r values are both a representation of the same thing.

A double pane window with a low e coating will have an r value equivalent to or better than a triple pane window. R values of uninsulated concrete. Know exactly how much you need with our project calculators. When shopping for windows or doors look for higher r values and lower u values for the most energy efficient products possible.

How can a replacement window s u value be improved. The lower a unit s u value number the slower it transfers heat. The higher the r value the greater the resistance. Fortunately window technology has greatly improved so it is now possible to have large expanses of windows.

A window is considered to be low e if its emissivity is 0 35 to 0 05. A lower u factor means a better insulating window. If you like math a u value 1 r value the u value is the inverse of the r value. As a window s emissivity decreases its r value increases.

The lower the u value the slower the rate of heat flow and the better the insulating quality. U value is the amount of heat transferred through a material. The more common term r value refers to the resistance of the window to heat conduction and it is the inverse of the u factor that is r value 1 u factor. John wiley sons inc 2006.

R value measures how well certain building insulation materials can resist heat. While the u factor is used to express the insulation value of windows r value is used for insulation in most other parts of the building envelope walls floors roofs. Energy and the environment. Concrete homes magazine web search 5 18 2010 r value for concrete glass other materials wikipedia web search 5 18 2010 citing ristinen robert a and jack j.

To compare r value and u factor. The rate at which the glass transfers loses heat. When determining how much insulation you need don t guesstimate calculate. The r value is the measure of heat flow resistance the higher the r value the better.

And we test them to the extremes so you can count on them to last.