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UPVC casement windows
Inward-opening and tilt-turn sashes on 3-, 5- or 7-chamber profiles with galvanised steel reinforcement.
Technical data sheet · No. 01
A window is known by its cross-section.
Holowin is the UPVC window and door division of Armaghan Tejarat Rahsam. From choosing a 3-, 5- or 7-chamber profile to cutting, welding, hardware, insulated glass and installation — every step is documented in numbers and tests.
A division of Armaghan Tejarat Rahsam Co.
HW-7C / 82
135,000sq ft partner factory
300,000+m² annual capacity
10 yearswindow & door warranty
ISO 9001quality management
§ 01 — Products
Products
A complete window and door family for homes, hotels, offices and commercial buildings — all customisable in size, colour, foil, glass and hardware.
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UPVC sliding windows
Two- and three-track sliders for balconies and shallow façades; brush seal plus double gasket.
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Tilt & turn windows
Quiet ventilation when tilted, easy cleaning when turned.
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Awning windows
Ventilate even in rain — bathrooms, kitchens and façade top bands.
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Picture (fixed) windows
Large fixed openings with maximum daylight and minimum heat loss.
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Single hung windows
Lower sash slides vertically; common on export projects.
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Folding windows
Fully open counters for restaurants and open kitchens.
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UPVC doors
Entrance, balcony and terrace doors with multi-point locks and low thresholds.
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Sliding & lift-slide doors
Openings several metres wide on top- or bottom-track systems.
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Bi-fold doors
Join interior and garden or terrace into one space.
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Patio & French doors
Double-leaf doors with large glazing and European hardware.
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Thermal-break aluminium
Aluminium profiles with thermal breaks for façades and commercial work.
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Steel, wood, iron & interior doors
Steel entry and steel French doors, wooden interior doors, barn doors and garage doors.
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Storefront & commercial façades
Shop fronts, lobbies and glazed office façades.
§ 02 — Profiles
Profile build: 3, 5 or 7 chambers?
Each chamber is a layer of still air. More chambers mean better thermal and acoustic insulation, and a deeper frame that takes thicker glazing.
3-chamber
60 mm depth · Uf ≈ 1.6
Economical; mild climates, utility and budget projects.
5-chamber
70 mm depth · Uf ≈ 1.3
The residential standard; fits 24–32 mm double glazing.
7-chamber
82 mm depth · Uf ≈ 1.0
Cold climates, hotels and low-energy buildings; triple glazing ready.
Uf values are indicative and depend on the profile system; exact figures are on each system’s data sheet.
§ 03 — Factory
Factory & process
Our partner factory, Anhui Hotian Doors And Windows Co., Ltd. in Huainan, Anhui Province, China, has over a decade of experience manufacturing and exporting UPVC, PVC, aluminium and iron glass doors and windows, with internationally sourced equipment and dedicated export lines.
- Premium materials
- Automated precision cutting
- CNC machining
- Standardised assembly
- Corner welding & cleaning
- Hardware fitting
- Performance testing
- Export packaging
Solutions for Families
Quiet, energy savings and home security.
Solutions for Contractors & architects
Drawing review, data sheets, cut lists and delivery schedules.
Solutions for Wholesalers & dealers
Project pricing, export packaging and sales support.
§ 04 — Standards
Standards & certificates
Factory products carry CE, NAFS, NFRC and NAMI certification and an STC 38 acoustic rating. Our quality-control module is built on these references:
| EN 12608-1 | Unplasticised PVC profiles — classification, requirements, test methods |
| EN 12608-3 / -4 | Colour-coated and thermo-laminated (foiled) profiles |
| ASTM D4726 | Rigid PVC exterior profile extrusions for windows and doors |
| AAMA/NWWDA 101/I.S.2 | Performance specification for vinyl, aluminium and wood windows |
| NFRC | Energy performance ratings (U-factor, SHGC) |
| STC 38 | Sound transmission class — hotels and busy streets |
Why Holowin
Stable capacity, on-time projects
Dedicated export lines; 10 windows or 1,000, with stable lead times even in peak season.
Full customisation (OEM/ODM)
Size, material, glass, colour and design built to your drawings.
Code-compliant quality
CE, NAFS, NFRC and NAMI certified; ISO 9001 factory.
10-year warranty
Decade-long maintenance coverage on all windows and doors.
For every buyer
Families, contractors and architects, wholesalers — one quality level.
Four-language support
Persian, English, Arabic and Russian for Iran, Iraq, the Gulf and CIS markets.
§ 05 — Projects
Projects
The Armaghan Tejarat Rahsam project portfolio will be published here shortly. Typical work by our partner factory:
- Soundproof windows for hotels
- Sliding doors for residential projects
- French doors
- Custom entry doors
- Custom interior doors
- Window & door packages for apartment blocks
Holowin engineering tools
Material take-off, optimised cut lists and a QC checklist — free, in your browser.
§ 06 — Tools
FAQ
What is the difference between 3-, 5- and 7-chamber windows?
The number of air layers inside the profile. More chambers give better thermal and sound insulation and room for thicker glass; 5 chambers suits most homes.
How long is the warranty?
All windows and doors carry a 10-year maintenance warranty.
Can I choose any size and colour?
Yes — size, colour, woodgrain foil, glass and hardware are fully custom.
What is the minimum order?
From a small project of a few windows to projects of a thousand windows.
How do I get a quote?
Enter your sizes in the estimator and email us the spec, or reach us on WhatsApp.
§ 07 — Contact
Contact & quotes
Send us your project details for a quote, a catalogue or samples.
Emailinfo@holowin.ir
Salessales@holowin.ir
Factory WhatsApp+8615058581581
Factory phone (China)+86-551-65566895
CompanyA division of Armaghan Tejarat Rahsam Co.