Energy Saving Twin Double Double Hung Windows

Double-Hung Windows: Pros and Cons

The double-hung window is the most common style of window available today. And the reason is simple: double-hung windows are easier to clean.

Double-hung windows with tilt-in (also called tilt-out) design can be cleaned from inside the house. With single hung windows (and older double-hung windows without tilt-out function), it's difficult or impossible to clean the outside of the lower sash from indoors. You have to reach it from the outside--easy if the window is ground-level, difficult if the window is upper-level.

Single-hung windows can also have a tilt-in or removable lower sash, but you still have to reach outside the window to clean the upper sash, a perilous task.

The ability to open the upper sash on a double-hung window is another advantage in terms of airflow. Sometimes it's nice to open the upper sash and not have air blowing in from below. You can also create a minor recirculating effect by opening both sashes about halfway or less. In theory, this allows warmer air to escape through the upper sash and cooler air to enter through the lower sash. But in reality, this natural convection has little cooling effect on a room.

Finally, for homes with small children, double-hung windows' top opening sash allows you to keep the lower sash closed, yet still have airflow coming through the open top.

Naview factory covers more than 600,000 square meters, equipped with anodizing vertical line, powder coating vertical painting line, 5000T pressing machine, automatic vertical warehouse equipment, etc.

A completed production system has been established: casting, extruding, anodizing, electrophoresis, powder coating, PVDF, heat-transfer wood grain, polishing, brushing, heat insulation (stripping & glue injection), doors & windows fabrication, industrial extrusion finish machining, automated logistics systems, etc. Naview has basically realized the automation of the production process, improved efficiency and quality with high technology.

Q: How to get quotation?

A: The final price depends on specific requirements and designs. Contact us and we will send you our catalogue. Pls provide us with as much details as you know, concerning your application, design, size, thermal or not, color, quantity, surface treatment, trade terms and etc. Then we can make the quote.

Q: How long for production and delivery?

A: Around 20 days for production. Delivery time varies from 15 to 40 days depending on the port of destination.

Q: What is your payment terms?

A: 30%～50% of the total amount by T/T as deposit. The remaining balance is completed before delivery.

Q: Can I come to your factory before I make the order?

Yes, you are welcome to our factory(Foshan, Guangdong). If you like, we would like to pick you up.

Q: What is your MOQ?

For window and door, usually MOQ is 20 Square meters.