- Pella 150 Series vinyl single-hung windows deliver a classic look with a bottom sash that opens for increased ventilation 
- SunDefense Low-E glass lets in light while helping to block heat, keeping homes cooler in the summer and warmer in the winter 
- The bottom sash slides up and down to provide ventilation with a stationary top sash 
- Pella's vinyl uses a fade-resistant formula that is performance tested for excellent weathering, durability and color retention 
- All-metal cam-action locks are anchored to the sash, ensuring long-lasting, dependable operation, with a hardware design that complements the window 
- A cam action lock reengages the sashes and pulls them against the weatherstripping to ensure a superior weathertight seal 
- The balance system provides impeccable opening and closing performance 
- A quick installation frame design helps reduce installation time 
- Backed by Pella's limited lifetime warranty, one of the strongest warranties in the industry