Low-E Glass vs Triple-Glazed Glass: Which Is Better?

August 12, 2024

Key Takeaways

Low-E glass features a microscopically thin coating that reflects heat – a great solution for energy efficiency in mild climates.
Triple-glazed glass has three layers of glass and two insulating spaces for superior insulation and noise reduction in harsher climates.
While Low-E glass is more cost-effective and versatile, triple-glazed glass provides maximum energy savings and comfort.
Choosing between Low-E and triple-glazed glass depends on your specific climate, budget, and energy efficiency needs.
At Panda Windows & Doors, we offer personalized consultations and a wide variety of design and customization options to help you make the right choice for your home.

What is Low-E Glass?

Low-E glass has a microscopically thin, transparent coating that reflects heat. The ‘low emissivity’ coating is applied to one side of the glass in double-glazed windows, and works by bouncing back indoor heat into the room while repelling the sun’s heat.

It’s a smart way to control the climate in your home without relying too much on heating and cooling systems.

Advantages of Low-E Glass

It can help you save on energy bills by reflecting interior temperatures back inside your home.
Its coating blocks most of the ultraviolet light that can fade your carpets, curtains, and furniture.
It helps reduce condensation on window panes, which can prevent mold growth and water damage.
It can be used in any window configuration, whether it’s single, double, or even triple-glazed.

Disadvantages of Low-E Glass

It costs more upfront than regular glass (but keep in mind that energy savings can offset this over time).
In certain lighting conditions, the coating can produce a slight haze or rainbow effect, (although this is usually not noticeable.)

An image which shows how Low-E glass keeps indoor heat in and solar heat out.

Here’s how Low-E glass keeps indoor heat in and solar heat out (image courtesy of VSOM Glass).

Founded in 1991, Panda Windows & Doors specializes in state-of-the-art custom glass wall systems for both residential and commercial spaces through Panda Windows & Doors. Operating from our manufacturing facility in Las Vegas, Nevada, we have been at the forefront of innovation for over 30 years. Our extensive product lineup includes over 80 high-end offerings, such as pivot doors, French doors, folding doors, lift & slides, multi-slides, horizontal sliding walls, and operable windows. These systems are available in materials like aluminum, steel, stainless steel, bronze, solid wood, and aluminum-wood clad.

We are renowned for our award-winning designs, engineering solutions, and fast lead times, delivering in just 6-10 weeks to customers throughout the U.S. and Caribbean. Trusted by leading architectural firms and glaziers nationwide, we stand as the premier manufacturer of custom luxury windows and doors in the United States.

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What is Triple-Glazed Glass

This glass type has three layers of glass and two insulating air or gas spaces – if standard glass was a cozy sweater, triple-glazed glass is basically a high-tech insulated jacket.

Advantages of Triple-Glazed Glass

It provides high-level thermal insulation with its extra layers of glass and gas, which is particularly beneficial in areas with extreme temperatures.
It creates a quieter home environment because its additional layers make it harder for sound to penetrate.
It reduces the risk of condensation and the associated problems like mold and mildew.

Disadvantages of Triple-Glazed Glass

It’s heavier and may require stronger frames and hardware.
The cost is generally higher, not just for the windows themselves but also potentially for the installation.
Its weight and thickness limit its design options.

An image of a triple-glazed glass window.

Here’s a triple-glazed glass window (image courtesy of Checkatrade).

Low-E Glass vs Triple-Glazed Glass

Energy Efficiency

Due to its coating and ability to reduce the amount of heat transferred through it, Low-E glass is very energy-efficient, decreasing energy usage and costs.

In the same vein, triple-glazed glass is an effective barrier that increases a window or door’s insulating properties. This gives it a higher energy rating (ER) and lower solar heat gain coefficient (SHGC) – so you get improved overall energy performance.

Cost Considerations

Low-E glass is generally less expensive than triple-glazed glass – but the long-term energy savings for triple-glazed glass can offset the initial cost, making it a worthwhile investment, particularly for homeowners in harsher climates.

Installation and Maintenance

Low-E glass, being similar in weight and thickness to regular glass, doesn’t usually require any special adjustments to your existing window frames or hardware.

On the other hand, triple-glazed glass is heavier and bulkier, so the frames and hardware may need to be reinforced. You should make sure that your window frames can support the extra weight. At Panda Windows & Doors, we recommend comprehensive assessment and preparation by specialized installers for our triple-glazed windows.

Maintenance for both types of glass is similar to that of any window. Regular cleaning with a non-abrasive cleaner will keep the glass clear and streak-free. Just remember, the Low-E coating is usually on the inside of one of the panes, so take care not to scratch it during cleaning.

With proper installation and maintenance, both Low-E and triple-glazed windows can last for decades.

Aesthetic and Practical Considerations

When it comes to aesthetics, Low-E and triple-glazed windows offer a clear view of the outside world. However, Low-E coatings can sometimes have a slight tint, depending on the type of coating used. This can improve the look of your windows and even contribute to reducing glare inside your home.

Triple-glazed windows, with their additional pane, look slightly thicker, which might affect the aesthetics of ultra-slim frame designs. But for most homeowners, the added benefits of energy efficiency and noise reduction far outweigh these minor aesthetic inconveniences.

Ideal Uses for Each Glass Type

Best Situations for Low-E Glass

Low-E glass is an excellent choice for:

Homes in mild to moderate climates where extreme temperatures are not a common concern.
Upgrading existing windows without the need for new frames or sills, thanks to Low-E glass’s compatibility with standard window setups.
Reducing UV exposure to protect interior furnishings from fading.

If your home gets plenty of direct sunlight, Low-E glass is a great way to prevent your furniture from fading.

Best Situations for Triple-Glazed Glass

Areas with harsh winters or hot summers where the extra insulation can make a significant impact on indoor comfort and energy efficiency.
Homeowners looking for noise reduction, whether it’s from traffic, airports, or noisy neighborhoods.
Those who prioritize environmental sustainability.

FACTOR	LOW-E GLASS	TRIPLE-GLAZED GLASS
Energy Efficiency	– Reduces heat transfer through windows – Reflects solar heat to keep homes cooler in warm weather – Can reduce heat loss by up to 50% and solar heat gain by 30-70%	– Provides superior insulating properties with lower U-factor – Offers better energy efficiency with higher energy rating (ER) and lower solar heat gain coefficient (SHGC) – Reduces condensation by keeping inner glass surface warmer
Cost Considerations	– Generally less expensive than triple-glazed glass	– Typically 20-30% more expensive than double-glazed windows due to additional materials and manufacturing costs
Installation and Maintenance	– Relatively easy to install and maintain	– Heavier and thicker than double-glazed windows, making installation more difficult – Extra weight can put more strain on window frames
Aesthetic and Practical Considerations	– Does not affect window appearance and can be used in various styles – Reduces heat loss in winter and heat gain in summer, improving comfort	– Can block out up to 20% more light than double-glazed windows due to additional pane of glass – Provides better soundproofing and security compared to double-glazed windows
When to Use	– Cost-effective option for enhancing energy efficiency – For single or double-glazed windows in mild climates	– When superior insulation and energy efficiency are top priorities – In harsh climates for maximum energy savings and noise reduction – When long-term energy savings outweigh higher initial cost

Comparison table between Low-E glass and triple-glazed glass.

Making the Right Choice with Panda Windows & Doors

At Panda Windows & Doors, we understand that choosing the right glass for your windows is a big decision.

We’re to help you every step of the way, from understanding your needs to providing a wide range of design and customization options for your windows and doors.

The Panda Process

1. Design: We help you choose the right custom luxury glass doors and windows from our 80+ options.

Tailor every detail, including glass types like Low-E or triple-glazed glass.
Review and approve your sales order to ensure all specifications are correct before manufacturing.

2. Manufacturing: Our project manager confirms all necessary components and orders any unique materials.

CNC machines precisely cut and mill extrusions.
Extrusions are then thoroughly cleaned and powder-coated for a durable finish.

3. Quality Control: Each product undergoes rigorous inspection and testing on our Test Wall. We ensure smooth functionality and quality, with photos and videos of your products before packaging.

4. Packaging & Shipping: Products are wrapped in protective materials and placed in custom-built crates for safe transit. We ensure your order arrives intact, whether shipping domestically or internationally.

5. Delivery & Warranty: Inspect your order upon arrival and register the product to activate the Limited Warranty. Apply a high-quality finish to wood surfaces within 7 days to prevent damage. Ensure proper installation and protection during construction.

6. Care & Maintenance: Follow our care and maintenance guide to keep your Panda products in top condition. Regular cleaning and maintenance will ensure a lifetime of use and beauty.

Frequently Asked Questions (FAQ)

Can Low-E glass be used in any climate?

Yes, Low-E glass is versatile and can be used in various climates. It’s particularly effective in areas with extreme temperature differences between seasons. If you’re in a milder climate, Low-E glass can still provide benefits by maintaining a comfortable indoor environment and reducing UV exposure.

How do I know if triple-glazed glass is right for my home?

Consider triple-glazed glass if you live in an area with harsh winters or hot summers. If energy efficiency and noise reduction are top priorities for you, triple-glazed windows are an excellent choice. Our team can help assess your home’s specific needs to determine if triple-glazed glass is the best option.

What is the lifespan of Low-E and triple-glazed windows?

Both Low-E and triple-glazed windows are designed to last. With proper installation and maintenance, these windows can perform well for decades.

Are there any additional benefits to triple-glazed glass besides energy efficiency?

Absolutely! Besides its superior energy efficiency, triple-glazed glass offers excellent noise reduction. It also provides enhanced security due to its additional pane.

How do I clean and maintain my Low-E or triple-glazed windows?

Cleaning your Low-E or triple-glazed windows is similar to cleaning regular windows. Use a soft cloth and a non-abrasive cleaner to avoid scratching the glass or damaging the coatings. Regular cleaning will maintain the clarity and performance of your windows. If you ever have questions about maintenance, don’t hesitate to reach out to us for advice.