Compare Inline Fiberglass Window Series

Compare operating styles, design flexibility, ventilation options, and project applications across Inline’s fiberglass window series.

Compare operating styles, design flexibility, ventilation options, and project applications

Choosing the right fiberglass window series depends on how the window needs to work, where it will be installed, and what matters most for your project: ventilation, large glass, traditional style, modern design, high-performance building, or easy maintenance.

Inline Fiberglass offers several window series for residential, commercial, architectural, and high-performance projects. This guide helps you compare the main options and narrow your selection before requesting a quote or product specs.

Quick Answer: Which Inline window series should you choose?

The right choice depends on opening style, frame appearance, glass size, project type, and performance requirements. For Passive House or high-performance projects, confirm the applicable product data, certification scope, glazing package, and documentation with Inline before specifying.

A Fiberglass Window System for Different Project Needs

Inline’s fiberglass window lineup is not one generic window offered in different shapes. Each series is designed around a different job: more ventilation, larger glass, traditional styling, commercial applications, or high-performance design.

Use this guide as a starting point. For final product selection, confirm details such as sizing, glass package, certification scope, technical drawings, installation conditions, and project requirements with Inline’s team.

Proof points to include visually on page, where available:

Product series photos
Operating-style diagrams
Links to spec sheets and technical downloads
Certification references with product-specific scope
Residential and commercial project examples
Request a Quote and Request Product Specs CTAs

Window Series Comparison Matrix

Window Series	Operating Style	Strong Fit	Common Project Use	Consider When
300 Series Tilt & Turn / Fixed	Tilt inward for ventilation; turn inward for full opening; fixed option available	Flexible ventilation, cleaning from inside, airtight-feeling operation	Custom homes, high-performance homes, modern residential projects, architectural projects	You want European-style operation and flexible airflow
325 Series Casement	Hinged side sash opens outward	Strong ventilation and clear opening	Residential, custom homes, light commercial projects	You want a classic outward-opening window with strong airflow
325 Series Awning	Hinged top sash opens outward from bottom	Ventilation with rain-shedding function	Bathrooms, kitchens, basements, mixed window layouts	You want fresh air while limiting direct rain entry
325 Series Fixed	Non-operable fixed glass	Matching fixed units beside operable 325 windows	Residential and commercial layouts	You need fixed glass with visual consistency beside casement or awning units
400 Series Strip / Fixed	Fixed strip or large fixed configurations	Large glass, modern design, architectural layouts	Commercial, institutional, contemporary residential, Passive House-oriented projects where applicable	You want expansive glass and clean sightlines
700 Series Casement / Hopper / Fixed	In-swing casement or hopper; fixed option available	Inward operation, safety, interior access	High-rise, urban, commercial, and projects where outward operation is not ideal	Exterior clearance or safety makes outward-opening windows impractical
800 Series Horizontal Slider	Sash slides horizontally	Space-saving operation	Bedrooms, multi-unit residential, traditional layouts, areas with limited exterior clearance	You want easy horizontal operation without outward swing

Product Selection Guide

Compare window operation, ventilation, design flexibility, and applications to identify the right Inline fiberglass window series for your needs.

Best for flexible ventilation: 300 Series Tilt & Turn

The 300 Series Tilt & Turn is designed for projects where one window needs to do more than one job. In the tilt position, the sash opens inward at the top for secure ventilation. In the turn position, the sash opens inward more fully for access, cleaning, and stronger airflow.

This series is a strong fit for homeowners, architects, and builders who want a premium operating style with practical day-to-day benefits.

Good fit for:

Best for classic outward-opening airflow: 325 Series Casement

The 325 Series Casement is a strong choice when the project calls for an outward-opening window with effective ventilation and a clean residential or light commercial appearance.

Casement windows are often selected for rooms where airflow matters, including bedrooms, living spaces, and areas where a wide sash opening is preferred.

Good fit for:

Best for ventilation during changing weather: 325 Series Awning

The 325 Series Awning opens outward from the bottom, with the hinge at the top. This makes it useful in spaces where ventilation is important but direct exposure to rain should be reduced.

Awning windows are often used above, below, or beside fixed windows to add airflow without changing the overall design too much.

Good fit for:

Best for large fixed glass and modern layouts: 400 Series Strip / Fixed

The 400 Series Strip / Fixed is designed for fixed glass applications where the goal is clean sightlines, daylight, and architectural impact.

This series is often the right starting point for large glass areas, strip window layouts, contemporary homes, commercial buildings, institutional projects, and high-performance building designs.

Good fit for:

Large fixed glass
Modern residential design
Commercial buildings
Institutional projects
Passive House and high-performance projects where applicable
Projects where ventilation is handled by separate operable units

Best for inward-opening applications: 700 Series Casement / Hopper / Fixed

The 700 Series is designed for projects where inward operation makes more sense than outward operation. This can be important in high-rise, urban, walkway-adjacent, or tightly configured projects where outward-opening windows may not be suitable.

The series includes casement, hopper, and fixed options, giving designers flexibility when exterior clearance, safety, or maintenance access matters.

Good fit for:

Best for horizontal operation: 800 Series Horizontal Slider

The 800 Series Horizontal Slider is designed for spaces where a sliding sash is the preferred operating style. Because the sash slides side to side, it does not project inward or outward.

This can make it a practical choice for bedrooms, multi-unit residential layouts, and areas where exterior space is limited.

Good fit for:

Best for traditional single hung style: 850 Series Single Hung

The 850 Series Single Hung offers a familiar vertical window style, with the lower sash moving upward while the upper sash remains fixed.

This series is a good fit for projects that need a traditional appearance, simple operation, and space-saving vertical movement.

Good fit for:

Best for traditional style with more ventilation control: 900 Series Double Hung

The 900 Series Double Hung allows both the upper and lower sashes to move. This gives homeowners more control over airflow than a single hung configuration.

Double hung windows are often chosen for traditional elevations, upper floors, and projects where tilt-in cleaning access is useful.

Good fit for:

Compare By Project Need

I want the most flexible ventilation

Start with the 300 Series Tilt & Turn, 325 Series Casement, or 900 Series Double Hung.

Tilt and turn windows offer two opening modes. Casement windows provide strong outward airflow. Double hung windows allow top-and-bottom ventilation in a traditional format.

I want large glass and a modern look

Start with the 400 Series Strip / Fixed.

Fixed windows are often the better fit when the main goal is daylight, views, and clean architectural lines. Operable units can often be combined with fixed units depending on the design.

I need a window for a bedroom

Common options include casement, tilt and turn, horizontal slider, single hung, or double hung windows.

The right choice depends on egress requirements, ventilation preference, room layout, exterior clearance, and design style. Do not choose by style alone; confirm code, sizing, and operation requirements for the specific room.

I need something for a Passive House or high-performance project

Start with product documentation, not assumptions.

Select Inline products may support high-performance building needs, but certification scope and performance depend on the exact series, size, glazing package, and configuration. Confirm current product data, applicable certifications, and documentation with Inline before specifying.

I want a traditional window style

Start with the 850 Series Single Hung, 900 Series Double Hung, or 800 Series Horizontal Slider.

These styles are often familiar to homeowners and can work well when the design calls for a more traditional look.

I have a commercial or multi-unit project

Start with the 400 Series, 700 Series, or other series based on operation, project conditions, and technical requirements.

For commercial projects, product choice should be reviewed with the project’s performance targets, drawings, opening conditions, lead-time needs, and documentation requirements.

Understanding Common Window Operating Styles

Compare how different window styles function, where they are commonly used, and the factors that may help determine the right fit for your project.

Tilt and turn vs casement windows

A tilt and turn window opens inward in two ways. It can tilt at the top for controlled ventilation or turn inward for fuller access.

A casement window usually opens outward from the side. It is a strong choice when the goal is direct ventilation and a familiar operating style.

Choose tilt and turn when you want inward operation, flexible ventilation, and easier access to the outside glass from indoors. Choose casement when you want a classic outward-opening window with strong airflow.

Fixed vs awning windows

A fixed window does not open. It is usually chosen for daylight, views, energy performance goals, and clean design.

An awning window opens outward from the bottom and is commonly used where ventilation is needed. Because the sash angles outward, it can help provide airflow during light rain conditions depending on exposure and installation.

Choose fixed windows for large glass and views. Choose awning windows where you need ventilation in kitchens, bathrooms, basements, or mixed window layouts.

Single hung vs double hung windows

A single hung window has one moving sash, usually the lower sash. A double hung window has two moving sashes, allowing more ventilation control.

Choose single hung when you want a simpler traditional style. Choose double hung when you want more airflow flexibility and easier access for cleaning where the tilt feature is available.

Need specs, drawings, or certification details?

For architects, builders, developers, and performance-focused homeowners, product selection should be backed by current technical documentation.

Inline can help you confirm:

Which series fits your project
Available operating styles
Glass and colour options
Product documentation
Applicable certification details
Fixed vs operable combinations
Quote requirements
Technical questions before specification

Common Questions About About Inline Fiberglass Windows

Find clear answers to common questions about Inline fiberglass windows, including product options, performance considerations, and how to choose the right solution for your project.

Which Inline fiberglass window series is best for bedrooms?

Bedrooms may use casement, tilt and turn, slider, single hung, or double hung windows depending on size, egress requirements, ventilation needs, and design preference. The safest answer is to confirm the opening size, local code requirements, and operating style with Inline before choosing.

Which series supports the largest glass areas?

For large fixed glass, the 400 Series Strip / Fixed is often the starting point. It is designed for fixed and strip window applications where daylight, sightlines, and architectural layouts matter. Final sizing and configuration should be confirmed with Inline.

Which Inline window series is best for Passive House projects?

Passive House and high-performance projects should be reviewed by product configuration, not just series name. Confirm the latest product data, glazing package, certification scope, and documentation with Inline before specifying.

What is the difference between tilt and turn and casement windows?

Tilt and turn windows open inward and usually offer two operating modes: tilt ventilation and full inward turn. Casement windows typically open outward from the side. Tilt and turn is often preferred for flexible inward operation, while casement is often preferred for classic outward airflow.

What is the difference between fixed and awning windows?

Fixed windows do not open and are used for views, daylight, and clean design. Awning windows open outward from the bottom and are used when ventilation is needed.

Are fiberglass windows good for traditional homes?

Yes, fiberglass windows can support traditional window styles such as single hung, double hung, and horizontal slider designs. The right series depends on the home’s architecture, opening size, ventilation needs, and desired finish.

Can I mix different window series in one project?

Many projects use a combination of fixed and operable windows. For example, a large fixed window may be paired with awning or casement units for ventilation. Inline can help confirm which combinations fit the project.

Can I get custom colours or glass options?

Inline offers window options that may include glass, colours, grilles, and hardware choices. Confirm available options, limits, and lead-time implications with Inline for your specific series and project.

Do I need to know the exact series before requesting a quote?

No. You can request a quote even if you are not sure which series fits. Share your project type, location, window sizes if available, preferred style, timeline, and any performance requirements. Inline’s team can help route you toward the right product path.

Not sure which window series fits your project?

You do not need to choose alone. Tell Inline about your project, and the team can help you compare operating styles, fixed vs operable options, technical documents, and quote requirements.