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Energy-Efficient Window Glass: A Homeowner’s Guide to Comfort & Savings

Your Guide to Advanced Glass Technologies for Ultimate Comfort & Efficiency

At Eco Glass, we don’t just replace glass; we upgrade your windows with cutting-edge technology designed to enhance your comfort, reduce your energy bills, and improve your home’s performance. Understanding your glass options means making an informed choice for a more efficient and enjoyable living space.

We specialize in Insulated Glass Units (IGUs) – specially engineered glass panes with advanced features to maximize insulation, block harmful UV rays, and even reduce noise. Here’s a look at the core technologies we offer:

Double vs Triple Glazed Glass

Most homes use double-glazed glass as the standard. Choose below to learn the difference.

Standard in most homes

What is Double-Glazed Glass?

Two panes of glass separated by a sealed airspace (often argon). The airspace acts as an insulating barrier that cuts heat transfer compared to single pane.

  • Comfortable & efficient — Strong thermal performance for typical Canadian homes.
  • Balanced daylight — Good brightness with common Low-E coatings.
  • Lighter & simpler — Works with standard frames and hardware; widely available.
  • Great value — Most cost-effective path to modern efficiency.
Best for: most orientations and average climates. Add a high-performance Low-E (e.g., LoĒ³-366) for stronger sun/UV control; add i89 for extra winter insulation.

Actual suitability depends on your existing window system and goals (comfort, sun control, noise). We’ll confirm the right make-up during your visit.

Argon Gas vs Air Fill

Argon is the invisible energy saver inside many modern double and triple IGUs. It’s inert, clear, non-toxic, and reduces heat transfer better than air.

Recommended for efficiency

What is Argon Fill?

Argon is a denser-than-air, inert gas sealed between panes. It slows convective heat flow, which helps achieve a lower U-Factor than the same unit filled with air.

  • Better insulation — Warmer interior glass in winter, steadier indoor temps.
  • No visual change — Clear, colorless; it doesn’t tint the glass.
  • Normal aging — Minor gas diffusion over many years is expected; performance is typically stable until a seal failure (fogging/moisture) occurs.
In our specs, argon is standard for most Low-E double and triple units because it improves thermal performance with a small cost impact.

Low-Emissivity (LoE) Coating

Smart Climate Control for Your Windows

What is LoE:

LoE coating is a microscopically thin, transparent metallic layer applied to the glass. It's designed to reflect specific wavelengths of light while allowing visible light to pass through. Think of it as a smart filter for your windows!

Blocks UV Rays

Protects your furniture, flooring, and artwork from fading by blocking damaging ultraviolet (UV) light.

Customizable Performance

LoE coatings come in different "levels" to suit various needs and climates:

Reflects Infrared Heat

In summer, it reflects solar heat out of your home, keeping it cooler. In winter, it reflects heat back inside, keeping your home warmer. This significantly reduces your reliance on heating and air conditioning.

LoĒ Color Simulator

Interior view

Clear Glass Baseline

Uncoated double-pane reference.
Daylight (VLT)
82%
More bar = brighter room.
Glare Reduction
18%
Computed as 100 − VLT.
Summer Heat Blocked
22% (SHGC 0.78)
Lower SHGC = more blocking.
Insulation (U-Factor)
U: 0.46 (IP) / 2.59 (SI)
Lower U = better insulation.

LoĒ-180 High Daylight

Bright and neutral low-E.
Daylight (VLT)
79%
More bar = brighter room.
Glare Reduction
21%
Computed as 100 − VLT.
Summer Heat Blocked
31% (SHGC 0.69)
Lower SHGC = more blocking.
Insulation (U-Factor)
U: 0.26 (IP) / 1.48 (SI)
Lower U = better insulation.

LoĒ-180 + i89 Winter Boost

Brighter end of low-E with added interior i89.
Daylight (VLT)
77%
i89 lowers VLT slightly vs 180.
Glare Reduction
23%
Computed as 100 − VLT.
Summer Heat Blocked
38% (SHGC 0.62)
Lower SHGC = more blocking.
Insulation (U-Factor)
U: 0.21 (IP) / 1.19 (SI)
Lower U = better insulation.

LoĒ²-272 Balanced

All-season comfort with moderate sun control.
Daylight (VLT)
72%
Neutral, slight cool tone.
Glare Reduction
28%
Computed as 100 − VLT.
Summer Heat Blocked
59% (SHGC 0.41)
Lower SHGC = more blocking.
Insulation (U-Factor)
U: 0.25 (IP) / 1.43 (SI)
Lower U = better insulation.

LoĒ³-366 Sun Control

Strong sun & UV control for hot exposures.
Daylight (VLT)
65%
Cooler tone, more glare control.
Glare Reduction
35%
Computed as 100 − VLT.
Summer Heat Blocked
73% (SHGC 0.27)
Lower SHGC = more blocking.
Insulation (U-Factor)
U: 0.24 (IP) / 1.37 (SI)
Lower U = better insulation.

LoĒ³-366 + i89 Max Control

Lowest glare + best insulation in this set.
Daylight (VLT)
63%
i89 lowers VLT slightly vs 366.
Glare Reduction
37%
Computed as 100 − VLT.
Summer Heat Blocked
73% (SHGC 0.27)
Lower SHGC = more blocking.
Insulation (U-Factor)
U: 0.20 (IP) / 1.11 (SI)
Lower U = better insulation.

Visual simulation depends on screen settings and ambient light. For accurate results, book a free appointment for an estimate — we’ll bring real glass samples so you can compare in person.

Smart Windows​

LoE Options

What it is:

In many of our double and triple-glazed units, the space between the glass panes isn't just filled with air – it's filled with Argon gas. Argon is an inert, non-toxic gas that is denser than air.​

LoE 180

Ideal for colder climates where maximizing solar heat gain is beneficial. It's clear and maximizes winter warmth.

LoE 272

A balanced option, offering good solar control while maintaining excellent clarity. It's one of the most commonly used coatings, suitable for many orientations.

LoE 366

Offers strong solar control with a subtle reflective appearance. It's excellent for hot climates or windows facing direct, intense sunlight, maximizing UV and infrared reflection.​

LoE i89

An interior surface coating that offers exceptional insulating performance, often combined with LoE 366 for ultimate energy efficiency.

Enhanced Safety & Durability

Tempered Glass

What is Tempered Glass​:

Tempered glass is a type of safety glass that has been specially treated (through heating and rapid cooling) to increase its strength. If it does break, it shatters into small, blunt granular pieces rather than sharp, jagged shards, significantly reducing the risk of injury.

Safety First

Essential for areas where safety codes apply, such as patio doors, shower enclosures, or windows close to the floor.

Increased Durability

More resistant to impacts and temperature changes than standard glass.

The Unsung Hero of IGU Performance

Spacer Options

What it is:

The spacer is the bar that separates the two (or three) panes of glass in an insulated glass unit, creating the sealed air or gas-filled space. A high-quality spacer is vital for preventing seal failure and maintaining the thermal integrity of your windows over time.

Our Primary Choice: The Aluminum Spacer

We primarily utilize robust aluminum spacers. These are designed with thermal breaks – a crucial feature that interrupts the path of heat transfer through the spacer itself.

Prevents Condensation & Seal Failure

A well-designed spacer, combined with a superior perimeter seal, prevents moisture from entering between the panes, eliminating unsightly fogging and ensuring the unit's longevity.

Maintains Thermal Efficiency

By minimizing heat transfer at the edges of the glass, the spacer contributes significantly to the overall energy performance of your insulated unit, helping keep your home comfortable and energy bills low.

Durable & Reliable

Our chosen spacers offer excellent structural integrity and durability, ensuring the long-term performance of your Eco Glass replacement.

Service Area

Tap an area to view neighbourhoods and local info.

Select an Area

Your Local, Trusted Window Partner

Eco Glass is the local window company homeowners trust for window upgrades (argon-filled Low-E IGUs) and window service (fogged or cracked panes, failed seals). Fully insured & code-compliant.

Serving Aurora

Aurora Window Company — Window Upgrades & Service

We’re your Aurora window company for clean window upgrades—argon-filled Low-E insulated glass—and fast window service to fix fogging, failed seals, and cracks while keeping your frames.

  • Window upgrade: LoĒ-180/272/366 with optional i89 for brighter, warmer rooms
  • Window service: foggy unit replacement, cracked panes, draft reduction
  • Neat installs, quick turnaround, warranty-backed glass
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Aurora Village
  • Aurora Heights
  • Aurora Grove
  • Hills of St. Andrew
  • Bayview Wellington
  • Aurora Highlands
  • Aurora Estates
  • Rural Aurora
Serving Barrie

Barrie Window Company — Window Upgrades & Service

Snowbelt swings need four-season performance. Our Barrie window company delivers window upgrades with argon-filled Low-E IGUs and reliable window service for fogging or broken glass.

  • Window upgrade: LoĒ-272/366 to tame sun & UV; optional i89 for winter warmth
  • Window service: seal failure (condensation), crack replacement
  • Clean job sites, dependable scheduling, strong warranties
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Painswick
  • Allandale
  • Holly
  • Ardagh
  • East Bayfield
Serving Bradford West Gwillimbury

Bradford WG Window Company — Window Upgrades & Service

From farmhouses to new builds, our window company provides window upgrades with argon-filled Low-E glass and fast window service to replace fogged or cracked IGUs.

  • Window upgrade: LoĒ-180/272/366 + i89 matched to your exposure
  • Window service: fogging, cracks, and drafty panes solved
  • Tidy installs, clear communication, manufacturer warranties
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Bradford
  • Bond Head
  • Coulson’s Hill
  • Deerhurst
  • Dunkerron
  • Green Valley
  • Newton Robinson
  • Pinkerton
Serving Caledon

Caledon Window Company — Window Upgrades & Service

Estate and rural homes benefit from our window upgrades—argon-filled Low-E IGUs that boost insulation—plus prompt window service for fogging or cracks.

  • Window upgrade: LoĒ-366 for sun-exposed rooms; add i89 for extra winter efficiency
  • Window service: double or triple IGU replacement, including patio doors
  • Respectful, tidy installs; warranty-backed glass
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Bolton
  • Caledon East
  • Caledon Village
  • Mayfield West
  • Palgrave
  • Inglewood
  • Alton
  • Belfountain
  • Cheltenham
  • Mono Mills
Serving East Gwillimbury

East Gwillimbury Window Company — Window Upgrades & Service

Our local window company delivers family-friendly window upgrades (argon-filled Low-E IGUs) and dependable window service for fogging and breakage.

  • Window upgrade: LoĒ-272/366 for sun control; i89 for winter comfort
  • Window service: seal failures, cracked panes, draft fixes
  • Fast service, neat finish, solid warranties
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Holland Landing
  • Sharon
  • Queensville
  • Mount Albert
  • River Drive Park
Serving Georgina

Georgina Window Company — Window Upgrades & Service

Lakeside glare and UV need smarter glass. Our window upgrades use argon-filled Low-E IGUs; our window service replaces fogged or storm-damaged panes.

  • Window upgrade: LoĒ-366 for strong sun control; i89 for cozy winters
  • Window service: fogged IGUs and cracked glass replaced fast
  • Professional installs, dependable warranties
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Keswick
  • Sutton
  • Pefferlaw
Serving King

King Window Company — Window Upgrades & Service

Custom sizes and classic profiles welcome. We tailor window upgrades with argon-filled Low-E glass and deliver careful window service for fogging or cracks.

  • Window upgrade: LoĒ-180/272/366 + i89, matched to room exposure
  • Window service: glass-only IGU replacement to keep your frames
  • Discreet workmanship; warranty-backed glass
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • King City
  • Nobleton
  • Schomberg
Serving Markham

Markham Window Company — Window Upgrades & Service

Protect interiors from fading and reduce heat gain. Our window upgrades use argon-filled Low-E IGUs, and our window service solves fogging and cracks quickly.

  • Window upgrade: balanced LoĒ-272 or higher control LoĒ-366
  • Window service: fogging/condensation and broken panes
  • Clean installs, clear timelines, strong warranties
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Unionville
  • Cornell
  • Milliken Mills
  • Greensborough
Serving Newmarket

Newmarket Window Company — Window Upgrades & Service

Choose our local window company for comfort-first window upgrades (argon-filled Low-E) and responsive window service that keeps rooms bright and draft-free.

  • Window upgrade: LoĒ-180/272/366 + i89 tailored to each room
  • Window service: foggy IGUs, cracked glass, thermal improvements
  • Neat, respectful installs; dependable warranties
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Stonehaven
  • Glenway
  • Armitage
  • Woodland Hill
Serving North York

North York Window Company — Window Upgrades & Service

Urban-ready solutions: window upgrades with argon-filled Low-E thermals for glare control and comfort, plus window service for fogging and breakage.

  • Window upgrade: LoĒ-366 for south/west sun; i89 for winter warmth
  • Window service: glass-only IGU replacement for failed seals
  • Clean, efficient installs; warranty-backed units
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • York Mills
  • Don Mills
  • Willowdale
  • Downsview
Serving Richmond Hill

Richmond Hill Window Company — Window Upgrades & Service

Bright, sunny rooms call for smarter glass. Our window upgrades use argon-filled Low-E IGUs; our window service fixes fogging and cracks with minimal disruption.

  • Window upgrade: LoĒ-272 for balance or LoĒ-366 for maximum sun control; add i89 for insulation
  • Window service: seal failures and cracked panes replaced
  • Professional installs, clear timelines, solid warranties
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Bayview Hill
  • Jefferson
  • Oak Ridges
  • Langstaff
Serving Vaughan

Vaughan Window Company — Window Upgrades & Service

Large, west-facing windows? Our window upgrades with argon-filled Low-E thermals keep spaces cool and bright. Our window service replaces fogged or cracked glass fast.

  • Window upgrade: choose daylight or sun-control Low-E; optional i89
  • Window service: glass-only IGU replacement (keep your frames)
  • Tidy work, quick scheduling, warranty-backed units
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Maple
  • Thornhill
  • Woodbridge
  • Kleinburg
  • Concord
Serving Whitchurch-Stouffville

Whitchurch-Stouffville Window Company — Window Upgrades & Service

Growing families need comfort and clarity. We provide window upgrades with argon-filled Low-E IGUs and responsive window service for fogging, drafts, and cracks.

  • Window upgrade: LoĒ-180/272/366 options; add i89 for winter efficiency
  • Window service: condensation/fogging fixes and pane replacement
  • Neat installs, friendly communication, strong warranties
  • Fully insured & code-compliant

Neighbourhoods We Serve

  • Stouffville
  • Ballantrae
  • Musselman’s Lake

Don’t see your area? Ask us — we likely serve your neighbourhood.

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Ready to Choose the Perfect Glass for Your Home?

Our Eco Glass experts are here to help! We’ll assess your specific needs using tools like our infrared thermal camera, and recommend the ideal glass solution to optimize your home’s comfort, efficiency, and aesthetics.

Get Your Free Quote Today! Contact us to learn more about how our advanced glass options can transform your home or business.