Passive House Window Supply for High-Performance Projects
When your project depends on thermal performance, airtightness, durability, and technical documentation, ordinary window products are not enough.
Built For Projects Where Performance Matters
Inline Fiberglass supplies high-performance fiberglass windows and doors for Passive House, PHIUS, residential, commercial, and architectural projects across Canada.
Our team helps architects, builders, developers, and performance-focused homeowners identify the right product pathway, review available documentation, and move forward with confidence.
Select Inline products are designed for high-performance building needs. Contact Inline to confirm the right product, certification details, U-value documentation, drawings, and configuration options for your project.
Product Support Backed by Testing, Documentation, and Fiberglass Expertise
Passive House projects require more than a good-looking window. They require product confidence, verified documentation, and practical support before the specification is finalized.
Inline supports performance-focused projects with:
- Fiberglass window and door systems designed for long-term strength, stability, and thermal performance
- Select PHIUS / Passive House product pathways for high-performance building applications
- IGMAC-certified insulating glass units for long-term performance
- Technical documents and product information
- Project support to help confirm product fit, configuration, and documentation needs
Tested and Confirmed to Perform
Our windows and doors meet the rigorous standards of Passive House , Phius & Energy Star certification, ensuring superior energy efficiency and comfort in your home. Designed to minimize energy consumption, they provide a sustainable solution for modern living.
Passive House Certification
Our windows and doors are Energy Star certified, ensuring they meet strict energy efficiency guidelines set by the EPA. This certification helps you save on energy bills while contributing to a healthier environment.
PHIUS Certification
Inline Fiberglass products are certified by PHIUS, guaranteeing that they adhere to the highest performance standards for energy efficiency. This certification reflects our commitment to sustainable building practices and quality craftsmanship.
Energy Star Certification
Our windows and doors are Energy Star certified, ensuring they meet strict energy efficiency guidelines set by the EPA. This certification helps you save on energy bills while contributing to a healthier environment.
Passive House Window Supply Without the Guesswork
High-performance projects can stall when product information is unclear. This page is built to help your team move from research to product selection faster. Inline can support conversations around:
Product Selection
Choose from fiberglass window and door systems based on the needs of your project, including fixed windows, operable windows, sliding doors, glass options, frame performance, and design goals.
Technical Documentation
Request available product data, performance values, certification documents, drawings, and other technical resources needed for early planning or specification review.
Architect and Builder Coordination
Get support when comparing series, reviewing envelope goals, preparing project details, or confirming whether a specific Inline product pathway fits the intended building performance target.
Residential and Commercial Applications
Inline products can support performance-focused homes, custom builds, renovations, multi-unit projects, and commercial buildings where durability and energy performance are priorities.
Commercial Fiberglass Window Product Options
Inline offers a range of fiberglass window systems that may support commercial and high-performance projects.
600 Series Sliding Patio Doors
A high-performance sliding door pathway for projects that need large openings, indoor-outdoor access, and stronger thermal performance than typical sliding door systems.
Best for:
Patios, terraces, modern homes, high-performance residential projects, commercial or multi-unit applications where applicable.
400 Series Strip / Fixed Windows
A strong option for projects that need large fixed glass areas, clean sightlines, and high thermal performance. This series is especially relevant for architectural and commercial projects.
Best for:
Large fixed openings, strip window applications, commercial projects, architectural homes, high-performance envelopes.
Other Fiberglass Window Options
Depending on the project, other Inline fiberglass window series may also be relevant. The right choice depends on window operation, size, glazing, project type, climate zone, and certification requirements. Contact Inline Fiberglass today to learn more and find options that work best for your specific project or use case.
Why Fiberglass Makes Sense
Fiberglass is well suited to performance-focused window and door design because it supports strength, dimensional stability, and thermal performance.
For project teams, that can help with:
- Reducing thermal bridging concerns at the frame
- Supporting long-term frame stability
- Allowing larger glass areas with strong frame performance
- Improving product durability across changing Canadian conditions
- Supporting clean modern design without treating performance as an afterthought
Inline focuses on fiberglass windows and doors. That focus gives the team deeper product knowledge and a clearer path for helping architects, builders, and owners choose the right system.
How the Passive House Supply Process Works
A Clear Path From Inquiry to Project Support
1. Share Your Project Details
Send your project location, building type, rough opening details, drawings if available, and the performance goals you are trying to meet.
2. Review Product Fit
The Inline team helps identify which fiberglass window or door systems may fit the project and what documentation should be reviewed.
3. Confirm Documentation
Request available specs, drawings, performance data, PHIUS or Passive House-related documentation, and other product details needed for your team.
4. Coordinate Next Steps
Once the product direction is clear, Inline can help move the conversation toward quoting, product selection, and the right sales or dealer-supported pathway.
5. Confirm Warranty and Service Routing
Commercial projects should confirm warranty scope, service process, and support responsibilities based on the product, project type, and purchasing path.
Who This Service Is For
Inline’s product range supports residential, commercial, architectural, and high-performance applications. Use these product paths if you already know what you are looking for.
Architects and Specifiers
Use this page to request product specs, drawings, certification details, and technical support before specifying Inline products.
Builders and Contractors
Get practical product guidance before quoting or ordering for a high-performance build.
Developers and Commercial Teams
Review fiberglass window and door pathways for commercial, institutional, multi-unit, or energy-focused building projects.
Homeowners
Ask which Inline products may support your Passive House or energy-efficient home project, then work with the right project contact to move forward.
Start Your Passive House Window Supply Request
The right window and door package depends on your project goals, climate zone, product configuration, and documentation needs. Tell Inline about your project and request the specs, drawings, and product guidance needed to move forward.
Common Questions About Passive House Window Supply
Find clear answers to common questions about Passive House Window Supply.
Are all Inline windows Passive House certified?
No. Certification is product- and configuration-specific. Select Inline products are designed for high-performance building needs, and specific documentation should be confirmed before specification.
Which Inline products are relevant for Passive House projects?
The 400 Series Fixed Window and 600 Series Sliding Door are key high-performance product pathways to review. Other products may also be suitable depending on the project requirements, but eligibility must be confirmed by product, glass package, size, and documentation.
Can Inline provide U-values and performance data?
Available performance data can be requested for relevant product configurations. For Passive House or PHIUS projects, confirm the exact documentation needed with Inline before using values in a specification.
Do you supply Passive House doors?
Inline offers high-performance fiberglass door systems, including sliding patio door options that may be relevant for Passive House and high-performance projects. Confirm the current documentation and product configuration with the Inline team.
Can Inline support projects outside Toronto?
Inline is based in the Toronto / Etobicoke area and supports projects through product supply and dealer-supported pathways where applicable. For projects outside the GTA, contact Inline to confirm the right sales, dealer, or support route.
Do you provide drawings and technical documents?
Yes, technical documents may be available for relevant products. Architects, builders, and specifiers should request the product package needed for their project.
Can homeowners request Passive House window support?
Yes. Homeowners planning a high-performance home, major renovation, or custom build can contact Inline to discuss product options and next steps.
What information should I send before requesting specs?
Send your project location, building type, product types needed, approximate sizes, drawings if available, target performance goals, and timeline. This helps Inline route your request properly.