Single slider windows are equipped with one sash that slides open. Double slider windows have two sashes that slide open, providing even better air circulation.
A vinyl sliding window generally runs $760. They are more economical than bay and casement windows and generally cost a bit less than picture and sash windows. Aluminum windows are the most economical, and wood windows tend to be on the higher end.
Costs vary greatly by region (and even by zip code). To get free estimates from local contractors, please indicate yours.