But how do homeowners choose windows that are best suited for their home and their climate? Leading manufacturers offer these tips.

* Look for reliability. Pay attention to warranties and don't settle for products, such as vinyl windows, that only offer a temporary warranty when you can get a lifetime warranty. Follow the instructions provided by the manufacturer to protect your warranty.

* Put your energy into saving. To save money over the long run, look for windows with the Energy Star label and low-E glass. Low-E is a microscopically thin coating applied to glass that reflects solar heat away from the inside of the house in the summer and prevents heat from leaking out through the windows in the winter.

* Consider maintenance factors. When purchasing wood windows you plan to paint rather than stain, choose those that come factory-primed. The primer helps the paint adhere better to the wood and helps protect the wood before it is painted. Or select new low-maintenance products that don't require painting at all, such as Jeld-Wen Premium Vinyl Windows. These windows won't chip, crack, peel or discolor because the extruded vinyl process allows the color to go all the way through.

* Be choosy about style. Windows are available in all kinds of shapes and sizes. Choose styles and materials that fit with the style of your home. Some vinyl windows now go beyond basic white with stylish new color options such as Desert Sand. They also offer many of the same architectural and design features as wood windows, such as simulated divided lites which bring more charm than simple grids between the glass. Select windows with "equal sight lines," which means that each section of the window is proportionally correct and provides a clean, architecturally accurate look.

* Go pro. To maximize energy efficiency and to protect warranties, have windows installed and fitted by a licensed professional. Leading manufacturers offer tips and resources for finding the right contractor and selecting products that work for your home.