Adjustable Vinyl Sill Expander or Aluminum Sill Angle
Compensates for out-of-square openings.

Air Infiltration
Air Infiltration is the amount of air leaking in and out of a home or building through cracks in walls, windows and doors. The rate of air infiltration is measured around a window or skylight in the presence of a specific pressure difference. It is expressed in units of cubic feet per minute per square foot of window area (cfm/sq. ft.). The lower a window's air infiltration rating, the better its airtightness.

Argon Gas
Argon is a colorless, odorless, non-toxic, non-corrosive, non-flammable dense gas which hinders heat transfer. Heat energy is naturally inclined to move towards cooler areas; however, the density of Argon prohibits the heat from easily penetrating it, so it's forced to remain where it is.

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Block & Tackle Balance System
Used in single hung and double hung windows as a means of counter-balancing the weight of the sash during opening and closing. Harvey's Block & Tackle Balance System:
  • Is individually pre-calibrated on each Harvey window for:
    • Easy fingertip operation.
    • Adjustment-free sash.
  • Features a compound nylon cord (used on parachutes and lobster traps) for a dependable and durable operating system.
  • Is warranted for the life of the window.
  • Compare Harvey's Block & Tackle Balance with others.

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Cable Support System
Harvey Bay and Bow Windows must have adequate structural support to ensure a stable installation. For this reason, a cable support system along with detailed instructions is supplied with each unit. Harvey strongly recommends the use of this cable system with every Bay and Bow installation.

A layer of aluminum bonded or sheathed to the exterior of a wood window to achieve a maintenance free product.

Compact Folding Handle
Our folding handle eliminates interference with blinds and other window treatments. It is available in White, Almond, or Bronze for Harvey vinyl casement windows and Coppertone for Harvey Majesty casement windows. Since they are compatible with all Harvey casements that are currently in the field, they may be purchased separately.

Condensation comes from the moisture in the air, and is caused by too much moisture in the air for a certain temperature. Condensation forms when warm, moist air touches a surface that is colder than the dew point of the warm air. As that air becomes colder and its temperature drops below its dew point, it must release excess moisture to reach its new, lower dew point. It releases moisture in the form of water, which appears on the colder surface. For more information on Condensation, read our Condensation Causes & Cures

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DSB Insulated
DSB is Double Strength Glass of 1/8" thickness.

Designer Pressure (DP)
The wind load pressure a product is rated to withstand.

Double Low-E/Argon
This glazing system utilizes Low-E (low-emittance) coating on both pieces of glass within the sash. Argon gas is then injected between the double-paned glass making it even more difficult for heat or cold to pass through. All Harvey vinyl double hung windows exceed ENERGY STAR qualifications throughout the U.S. when Double Low-E/Argon is used.

Double Low-E/Krypton
This top-of-the-line glazing system is part of our High Performance Package in our premium Tribute window. It utilizes Low-E (low-emittance) coating on two pieces of glass within the sash. Krypton gas is then injected between the glass making it even more difficult for heat or cold to pass through. Outstanding energy efficiency is achieved when Double Low-E/Krypton is used.

Dryer Vent Hole
For Hopper window units only. Consists of two sheets of acrylic, sealed with butyl with an overall thickness of 7/8". A 4" or 4 1/2" diameter hole will be cut through the acrylic to allow standard dryer vent pipes to pass through. NOTE: Harvey offers no glazing warranties on dryer vent units.

Dual Point Locking System with Keylock
Dual point is a 2-point locking system with a keylock cylinder.

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Program sponsored by the US Government's Department of Energy (DOE) and the Environmental Protection Agency (EPA). ENERGY STAR rated products save energy by meeting strict guidelines set by the DOE and the EPA. Harvey vinyl windows are ENERGY STAR qualified when glazed with Low-E/Argon Gas. More information »

Exterior Grid Package
The Exterior Grid Package combines a permanently fastened exterior grid with a contoured GBG to give the more authentic appearance of individual panes of glass. This is a great option when historical guidelines need to be followed. Available in 5/8" or 1" profile.

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Flush Mount Deadbolt
Flush mount deadbolt is a thumb bolt that is applied to the operating panel of a patio door. When engaged, it goes up through the header.

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Glazing Options
(Note: Not all glazing options are available with every window.)
GBG (Grids Between the Glass)
Colonial Grids (contoured profile) are available between the glass in white, almond and bronze (dark bronze for Majesty).

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Insulated Glass
Two pieces of glass spaced apart (with intercept spacer) and hermetically sealed to form a single glazed unit with an air space between.

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An inert colorless, nontoxic gas used in insulating windows to reduce heat transfer. Similar to Argon gas, Krypton gas is much heavier than air, making it more difficult for warm or cold air to pass through.

CombinesLow-E glass and Argon Gas for superior thermal efficiency, high R-values (low U-factors), and improved seal longevity. All Harvey vinyl double hung windows are ENERGY STAR qualified throughout the U.S. when Low-E/Argon is used.

Low-emittance (Low-E) refers to the window's ability to diminish heat loss, thus saving heating and cooling costs. In addition to energy savings, Low-E also effectively reduces the amount of transmitted ultraviolet light which can damage carpets, fabrics, and drapes. Ideal for any climate throughout the U.S.

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Multi-Point Locking System
Multi-point lock is a locking system that utilizes 4 locking "claws" that engages simply by turning the knob.

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The National Fenestration Ratings Council is the only organization that the EPA and DOE will accept test ratings from. All Harvey windows and doors are NFRC certified.

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Obscure glass is a "frosted" glass used for privacy, light diffusion, or decorative effects.

Oriel Windows
Oriel windows have sash of unequal heights (upper sash is larger.)

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Rigid-bar Meeting Rail
A fine feature that makes the Tru-Channel Storm Window outperform other windows is the revolutionary rigid bar tubular extrusion with double weather stripping. It really puts a stop to leaking air and keeps the frame square even after years of service.

R-Value measures the resistance of a glazing material or fenestration assembly to heat flow. A high R-Value window has a greater resistance to heat flow and a higher insulating value than one with a low R-Value.

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SDL (Simulated Divided Lites)
Colonial style grids that are applied to the exterior glass lite and used in combination with GBG to simulate individual glass lites.

Seacoast Hardware Package
A Stainless steel wheel package that is for coastal applications, corrosion-free hardware

Solar Heat Gain Coefficient (SHGC) measures how well a product blocks heat from the sun. SHGC is expressed as a number between 0 and 1. The lower the SHGC, the better a product is at blocking unwanted heat gain. Blocking solar heat gain is particularly important during the summer cooling season.

Snap-In Wood Grids
Colonial style Pine or Oak grids fastened to the interior glass lite (Majesty only). They are designed to be removable for easier cleaning of glass.

Spectral Rating
The minimum level of design pressure (air, water, wind) to which a representative test specimen is tested to achieve a particular rating.

STC Rating
STC (Sound Transmission Class) is a measure of sound reduction in accordance with ASTM Classification E 314. The higher the STC value, the better the product is at keeping sound out.

Structural Rating
The minimum level of design pressure (air, water, wind) to which a representative test specimen is tested to achieve a particular rating.

Structural Test Pressure
The pressure differential applied to a window or door system and is 150% of design pressure.

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Tandem Locking System
When the sash is latched in a Majesty casement window, a triggering mechanism automatically engages all bolts into the jamb. Likewise, the bolts are automatically retracted as soon as the latch is disengaged.

Tempered glass is treated glass that has been strengthened so that when shattered, it breaks into small pieces. It is required as safety glazing in patio doors, entrance doors, side lights, and other hazardous locations.

Triple Glazing
Triple glazing incorporates three panes of glass sealed with a glass spacer system for added performance and durability. Two panes of glass utilize Low-E coating, and both airspaces contain an inert gas for superior energy efficiency.

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U-factor measures how well a product prevents heat from escaping a home or building. U-factor ratings generally fall between 0.20 and 1.20. The lower the U-factor, the better a product is at keeping heat in. U-factor is particularly important during the winter heating season.

Unit Size
Unit size refers to the size of the window or door.

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Vertical Stabilizer Bar
Used in exterior rolling storm windows, this stabilizer bar at the frame center provides a rigid interlock for the sash.

Visible Light Transmittance
Visible Transmittance (VT) measures how much light comes through a product. VT is expressed as a number between 0 and 1. The higher the VT, the higher the potential for daylighting.

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Water Resistance Test Pressure
The amount of pressure a window or door is able to withstand without water penetration and is 15% of design pressure.

Welded Sash
Our welded sash design is heat sealed at 400 degrees for a permanent bond which provides years of trouble-free performance. The welded sash has been designed with an exterior glazing bead which offers a seamless interior finish. Manufactured in our factory with fully automated equipment, you're assured a product consistent and true to exacting standards every time.

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Porch Enclosure