Specifications
1. Product Overview
The PDH78 is a classical American style vinyl double hung window system, developed around a 78mm structural depth and an integrated nailing fin for straightforward new-build installation. Two sashes slide vertically past one another, combining a timeless appearance with practical, space-saving operation that suits a wide range of traditional and transitional homes. With double glazing as standard, a 1.5mm reinforced aluminum liner and a triple-chamber design, PDH78 delivers the insulation, ventilation and durability expected in the North American market, where it remains one of our most popular residential systems.
2. Key Performance Advantages
2.1 Timeless Appearance
With their two sashes stacked one above the other, double hung windows are the quintessential residential window type and suit a wide variety of traditional facade styles without dating.
2.2 Space-Saving Operation
Because both sashes travel vertically within the frame, the window never projects into the room or beyond the facade — an advantage beside walkways, decks, patios and furniture.
2.3 Tilt-In Sash for Ventilation
In addition to conventional vertical sliding, the sash tilts inward for ventilation, allowing indoor air to circulate even on rainy days without rain entering the room.
2.4 Superior Ventilation Performance
Both sashes can be opened to create a large operable aperture, and the sash can be positioned to direct airflow toward the ceiling or floor as required.
2.5 Structural Stability
The 78mm structural depth, combined with a 1.5mm reinforced aluminum liner and a triple-chamber design, gives the frame exceptional wind resistance and long-term dimensional stability.
2.6 Energy Efficiency and Comfort
Double glazing reduces heat loss and external noise, keeping interiors quieter and more comfortable while lowering heating and cooling demand.
2.7 Insect Protection
An invisible roll-up insect screen provides protection from insects without compromising the appearance of the window from inside or outside.
2.8 Easy Cleaning
The tilt-in sash design gives safe access to both glass surfaces from inside the building, removing the need for external access or ladders.
3. Technical Specifications
Parameter | Description / Value |
Material | UPVC (unplasticized polyvinyl chloride) |
Structure Depth | 78mm |
Frame Structure | 3 chambers |
Reinforcement | 1.5mm reinforced aluminum liner |
Glass Options | Double glazed |
Lock System | Cam lock |
Frame Color | White / customized |
Mosquito Net | Fiberglass screen |
Nailing Fin | Integrated |
Application | Residential houses, apartments, offices, North American market projects |
4. Processing & Customization Support
We provide comprehensive OEM/ODM services to meet specific project requirements:
Precision Fabrication: CNC cutting and welding of the sash and frame profiles, with the reinforced aluminum liner installed before assembly to keep the frame square.
Glass Build-Up: Double glazed units with Low-E coatings and warm-edge spacers, with tempered or laminated options where required.
Surface & Color: White as standard, with a wide range of laminate and customized color options to adapt to different architectural styles.
Integrated Nailing Fin: Supplied as standard for direct fixing to timber or steel framing in new construction.
Configuration: Fixed combinations, transoms and mixed elevations built from the same profile family.
5. Installation & Maintenance Guidelines
Opening Inspection: Confirm the rough opening is level, square, plumb and correctly framed before installation, and verify the nailing fin fixing line.
Nailing Fin Fixing: Fasten through the integrated nailing fin at the specified spacing to create a continuous weather barrier connection; do not drive fasteners through the drainage channel.
Insulation and Flashing: Apply flashing tape over the fin in accordance with local practice, and insulate the perimeter for thermal and moisture control.
Waterproof Sealing: Seal the internal and external joints as required; confirm sill pan drainage paths are clear and unobstructed.
Sash Alignment: Check that both sashes slide freely, that the meeting rail closes with even compression, and that the tilt latches engage fully.
Hardware Adjustment: Fine-tune the cam lock and sash balance so the window stays in position when partially open.
Screen Installation: Fit the roll-up insect screen and check that it retracts fully and without binding.
Film Removal: Remove protective films promptly after installation to avoid adhesive residue from sun exposure.
Regular Cleaning: Clean frames, sills and tracks with a soft cloth and water; lubricate the balance and lock hardware annually. Avoid abrasive cleaners.
6. FAQ
Can the size be customized?
Yes. All PDH78 windows are custom-made to fit your specific rough openings.
Can I ventilate the room when it rains?
Yes. The tilt-in sash function allows ventilation without rain entering the room.
How do I clean the outside glass?
The sash tilts inward, so both surfaces can be cleaned safely from inside the building.
Is a screen included?
An invisible roll-up fiberglass insect screen is available for this system.
How long is the warranty?
We typically offer 5–10 years warranty on profiles and hardware, depending on the project requirements.
Do you provide export packaging?
Yes. We use protective corners, stretch wrap, and seaworthy wooden crates or pallets to ensure safe delivery.
7. Company Profile
Qingdao Honor Building Products Co.,Ltd. is a leading manufacturer specializing in high-performance aluminum and UPVC window and door systems. With state-of-the-art production lines and extensive export experience, we serve residential and commercial projects globally. Our focus is on providing durable, energy-efficient, and aesthetically pleasing building solutions tailored to the diverse needs of international markets.
8. Contact Us for a Quote
For custom drawings, technical support, or a free quotation, please contact our sales team:
Direct supply from factory | OEM & ODM Support | Global Shipping Available
