Skip to content
Vision Art Aluminium
Single Hung Window

HR4 Window Series

Single Hung Window

The HR4 single hung window series pairs extruded aluminum construction with Miami-Dade certified impact performance, fabricated to each measured opening for residential and commercial projects in New Jersey and New York.

Explore Availability

What Is a Single Hung Window?

A single hung window is a vertical window with two sashes in which only the bottom sash moves; the upper sash stays fixed in the frame. Vision Art Aluminium builds this format on the HR4 architectural aluminum series, a system engineered for both laminated and insulated glazing and certified under Miami-Dade and Florida Building Code impact standards. The design load rating runs to +70/-80 psf, hurricane-grade numbers applied to residential and commercial projects across New Jersey and New York.

The fixed upper sash is what defines the category’s economics. Fewer moving parts mean fewer seals to wear, a lower air-leakage path and a lower price than an equivalent double hung unit, which is why windows single hung in format dominate multi-unit residential construction.

What Is the HR4 Window Series?

HR4 is an extruded aluminum window platform built for streamlined fabrication and rapid installation, the two factors that decide schedule on multi-story projects. The series supports a range of popular window styles from one profile family, so a building can carry matching sightlines across every elevation.

  • Single hung operable units, the core format of the series.
  • Casement, fixed and sliding styles on the same architectural system.
  • Laminated or insulated glazing packages per opening.
  • All RAL color options through electrostatic coating.

The electrostatically applied finish resists corrosion, fading and wear in both interior and exterior applications, which keeps a facade’s color uniform years after handover. Typical deployments include residential apartment complexes, office towers and institutional and industrial facilities.

HRW4 single hung window product hero
HR4 aluminum profile vertical layered diagram
HR4 single hung window cross-section

Which Window Types Does the HR4 System Support?

Window Types

Type Details
Single hung Bottom spring latch and weeplock
Casement Stylish folding handle is standard on all casement windows. Multi-point lock provides air and water-tight seal.
Fixed Designed to match typical building conditions
Sliding Polyamide roller with needle bearings. Spring latch at jamb and weeplock options.

Technical Criteria

Criteria Value
Design load +70/-80 psf
Water tightness ASTM E331-00 (2009)
Air infiltration ASTM E283-04 (2012)
Structurally tested TAS202-94
Missile impact-rated Small / Large – TAS 201-94
Thermal break 9/16″
HRW4: all sections

Section A-A

Section A-A

Section B-B

Section B-B

Single hung window model variants

What Makes the HRW4 a High-Performance Window?

Superior Thermal Performance & Energy Efficiency

The HRW4 window series features thermally broken aluminum frames combined with strategically placed polyurethane insulation. This design minimizes heat transfer, significantly improving indoor comfort while reducing energy consumption.

With advanced glazing options, this system is optimized for energy-efficient building envelopes, particularly in warm and high-solar-load climates, helping reduce cooling costs and enhance sustainability.

Smooth Operation with Secure Performance

The HRW4 single hung window is designed for effortless operation and reliable locking mechanisms, ensuring ease of use without sacrificing security. Precision-engineered components allow for smooth opening and closing cycles, making it ideal for high-traffic residential and commercial use.

High Impact Resistance & Certified Safety

Tested according to Florida Building Code standards, the HRW4 system offers exceptional resistance against high winds and wind-borne debris. Its impact-rated design provides enhanced safety and protection, making it a preferred choice for coastal developments, hotels, and high-rise buildings.

Versatile Design for Multiple Applications

The HRW4 system is designed to accommodate a wide range of architectural styles and building types, including:

  • Hotels and hospitality projects
  • Residential apartment complexes
  • Office towers and commercial buildings
  • Institutional and industrial facilities

Available in all RAL color options, the system offers flexible design possibilities to match any architectural vision.

Engineered Strength and Long-Term Durability

Manufactured using extruded aluminum construction, the HRW4 window delivers exceptional structural performance with minimal maintenance requirements. Its robust design ensures long-lasting durability without compromising aesthetic quality over time.

Additionally, the high-quality electrostatically applied coating provides superior resistance to corrosion, wear, and fading, making it suitable for both interior and exterior applications in demanding environments.

HRW4 profile

What Hurricane and Code Ratings Does the HRW4 Carry?

The HRW4 high-performance execution of the series is impact-rated and certified to Miami-Dade and Florida Building Code standards, the strictest wind-borne debris regimes in the United States. Certification at a +70/-80 psf design load means the window resists both the positive pressure of wind driving against the glass and the stronger negative suction that peels windows outward in a storm.

For NJ and NY coastal zones, the practical meaning is margin. A window certified for South Florida hurricane exposure operates far inside its limits during a Northeast nor’easter, and laminated glazing keeps the opening sealed even if the outer glass layer is struck. Impact rating, in plain terms, is a certification that the whole assembly, glass, frame and anchorage, survives debris strikes and pressure cycling as one unit.

Aluminum conducts heat, so an efficient aluminum window depends on interrupting the metal path. The HRW4 builds in a 9/16 inch thermal break, a structural insulating barrier separating exterior and interior aluminum, and accepts insulated glazing units for the thermal side and laminated packages for the acoustic side. With only one operable sash, the perimeter of moving seals is roughly half that of a double hung unit, cutting infiltration, the air leakage that bypasses insulation entirely.

Single Hung vs Double Hung Windows: Which Fits Which Project?

Single hung vs double hung windows is a decision about ventilation behavior, cleaning access and budget, not about quality. In a single hung unit the bottom sash slides up; in a double hung unit both sashes move and usually tilt inward for cleaning.

Criterion Single hung Double hung
Operable sashes 1 (bottom) 2 (top and bottom)
Air leakage paths Fewer, fixed top sash seals shut More, two moving sashes
Hardware and maintenance Fewer moving parts More balances and locks to service
Exterior glass cleaning From outside or ground level Tilt-in from inside on most models
Relative cost Lower Higher
Typical use Multi-unit, ground and low floors Upper floors needing tilt-in cleaning

The pattern across projects is consistent: single hung windows carry the bulk of a building’s openings, and double hung units are specified selectively where interior cleaning access justifies the premium, typically on upper floors.

When Does Single Hung Window Replacement Make Sense?

Single hung window replacement pays off on three triggers. Failed glazing seals, visible as fog between panes, mean the insulating gas is gone and the unit runs at single-pane performance. Frame corrosion or warped sashes on aged units mean air and water infiltration that weatherstripping cannot recover. And building-wide facade updates in multi-unit properties use replacement to reset both performance and appearance in one program.

Single hung replacement windows in the HR4 series are fabricated to the measured opening, not forced into standard sizes, and the streamlined fabrication process is what keeps multi-unit replacement schedules short. Vision Art Aluminium runs the sequence from site inspection through drawings, permits, manufacturing and installation by factory-trained crews, serving New Jersey and New York from its Montclair showroom.

Who Is the HRW4 Single Hung Window Right For?

Three buyer profiles get the clearest value. Multi-unit owners and developers get a fabrication-efficient system that scales across hundreds of openings with matching sightlines in any RAL color. Coastal and exposed-site projects get Miami-Dade certified impact performance with +70/-80 psf design loads as engineering headroom. Budget-planned replacements get the single hung format’s structural simplicity: fewer moving parts, fewer failure points, lower cost per opening than double hung equivalents.

Projects that prioritize tilt-in cleaning on every floor, or maximum ventilation through two operable sashes, point instead toward a double hung or casement specification, both available within the same architectural family.

Specifications and certifications can change. Current ratings, glazing packages and color options should be confirmed for the measured opening during quotation.

Frequently Asked Questions

What is a single hung window?

A single hung window has two vertical sashes of which only the bottom one opens; the top sash is fixed. The format offers fewer air leakage paths, fewer moving parts and a lower cost than a double hung unit, making it the standard choice for multi-unit residential and commercial buildings.

What is the difference between single hung and double hung windows?

In a single hung window only the bottom sash moves; in a double hung window both sashes operate and typically tilt inward for cleaning. Single hung units cost less and leak less air; double hung units offer more ventilation control and easier upper-floor glass cleaning.

Are single hung windows hurricane rated?

The HRW4 series is impact-rated and certified to Miami-Dade and Florida Building Code standards with a +70/-80 psf design load. Laminated glazing keeps the assembly sealed even after debris impact, providing engineering margin well above typical NJ and NY coastal wind exposure.

Are aluminum single hung windows energy efficient?

Yes, when thermally broken. The HRW4 integrates a 9/16 inch thermal break separating exterior and interior aluminum and accepts insulated glazing. The fixed upper sash also halves the perimeter of moving seals, reducing air infiltration compared with double hung formats.

When should single hung windows be replaced?

Replace when fog appears between panes (failed glazing seal), when frames corrode or sashes warp enough to leak air and water, or when a building-wide facade update is planned. HR4 replacement units are fabricated to each measured opening for multi-unit schedules.

Let's Talk

Discuss your HRW4 Single Hung Window project: share dimensions, glazing requirements, and finish preferences. Our team will configure the right specification for you.