Tag Archives: LoE Glass

What Makes a Good Patio Door?

Patio Door

Climate Solutions 4-Section Patio Door with Black Exterior

Climate Solutions 4-Section Patio Door with Black Exterior

Picking a Patio Door is never easy – many people have homes with doors that they have to fight to open and close.  Other common issues include failing locks and poor thermal performance.

In this article we highlight the five factors that you should take into consideration when looking for a new Patio Door.

1. Thermal Performance

The largest surface component of a Patio Door is the glass, which is also the biggest entryway for energy to escape from you home (or let the cold in).  Using Low-Emissivity glass is a must (find out more here) and it’s important to make sure you use the right material for the frames and sash.  As we’ve discussed before, Vinyl is the only choice.

Energy Star is an independent certification for excellent energy performance

Energy Star is an independent certification for excellent energy performance

The ideal door will have numerous chambers to help dissipate energy transfer and the glass should be held together with a non-metal spacer, preferably a foam spacer for optimum performance.


2. Ease of Use

Patio Doors are used more frequently than windows and as a result have enormous demands on the hardware.  A good patio door should be easy to open, requiring very little pressure to move the operating sashes.  Locks should engage when the door is closed, without having to jimmy them or struggling to line up.


An example of an anodized aluminum track, giving durability and consistent life-long performance

3. Hardware

A Patio Door is an entry point to your home – as a result it should have strong, durable and secure hardware.  Many doors will only have a single mortise lock, for ultimate security a double-mortise lock should be standard.

CS Double Mortise Lock

Here you can see the lock has two arms that engage to make a tamper-proof lock

The lock should be keyed from the outside and you should expect a foot-lock as standard, to give the option of worry-free ventilation.

4. Customization

You shouldn’t be fitting your home to a door, it should be the other way. This means fully custom sizes and finishes, whether it’s the exterior color, tinted glass or even integrated blinds.

CS blinds

Integrated blinds between the glass in a Patio Door

With blinds between the glass there shouldn’t be a compromise of functionality for thermal performance. There are now doors on the market which have blinds and soft-coat Low-E glass.

5. Structural Performance

A Patio-Door is a large unit that has a lot of structural functions.  It needs to be strong enough to work in the opening it’s put into, a minimum Design Pressure of 45 is favorable.

4 Section Patio Door

4-Section Patio Doors are naturally very big and need to be super-strong

To get the best structural performance at the manufacturing level it is essential that the door is made with a four-point welder in the frame, giving it rigidity and a perfect join.

We hope this article has been helpful, if you have any questions please don’t hesitate to get in touch!

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Low Emissivity Glass – Energy Efficient Options

Low Emissivity Glass

Low-E Glass

There are times it can be tough to make all the right decisions when ordering windows (one of the many reasons to makes rue you get the right contractor/installer). You’ve decided on what type of window you’re looking for, you know the grid pattern, the color, the series and then on top of that you’re asked what type of glass you want!  This article will help you answer this question and understand what  Low Emissivity glass is and how it is used.

Climate Solutions specializes in using Low Emissivity (Low-E) glass which has a coating on one surface of the glass that reduces energy transfer.  In layman’s terms  that low emissivity/energy transfer means it significantly reduces hot or cold transferring through the glass (and in or out of your home).

Low Emissivity

There are three main Low-E coatings we use, LoE-272, LoE-366 and i89 glass, all of which perform differently and can be combined to easily exceed Energy Star 2016.

First of all – the science behind it:  The sun gives out lots of Thermal radiation which is reflected by  the multiple layers of silver in the coating on the glass.  Simultaneously, longwave radiation from inside your house, for example radiators, flooring and even body heat, is prevented from escaping by the glass – this means your house keeps inside temperature consistent without letting the outside temperature influence it.

The benefit is clear – the less energy you lose through poor glazing the more efficient your home will be.  The more efficient your home, the lower your energy bills.  With Low-E Glass you can save up to 25% on your energy bills.

LoE Glass Types

What’s the difference between LoE-272, LoE-366 & i89?

LoE-272 and LoE-366 are soft coats that go on a surface that is inside the glass unit (so it can’t be touched).  The i89 is a hard coat that is on the interior surface of the window, the one that faces inside the home.  Because it is a specially formulated hard coating it is tough enough to be exposed, but it is only used in combination with the other types of glass – LoE-272/LoE-366.

In its simplest form it is down to the number of layers – LoE-272 has 8 layers in its coating, whilst LoE-366 has 12 layers.  These layers are what do the work of reflecting the heat all the while letting light into your home.  The glass with more layers, LoE-366 performs the best.

This is measured in three ways, that appear on your NFRC label – U-Factor (basically energy-efficiency – the lower the number the better), Solar Heat Gain Coefficient (how much of the sun’s heat gets through the window, the lower the number the better) and Visible Transmittance (how much light is obstructed by the window, the higher the number the better).

Energy Star®

Using LoE-272 will make an enormous difference compared to regular clear glass, or even hard-coat LowE products, but the clear winner is LoE-366.  Here you can see that LoE-366 is the only coated glass that performs to Energy Star standards in all climate conditions in the United States:

Energy Star Low-E Glass

To put it in practical terms – when it’s cold you’ll stay warmer and when It’s warm you’ll keep the cool in your house – here’s a table showing what the relative temperature difference will be using the LoE-366 glass:

Low-E Performance

If you have Southern or Western facing windows then we’d particularly recommend using LoE-366 because it will provide greater protection against the infrared heat rays from the sun.  Again, without using too much scientific terminology what does this mean for you?  Well, it will reduce the harmful effects of those rays and the benefits include less heat coming through and even protecting your furniture and fittings from light-fading.

To ensure that Energy Star is hit and exceeded the recommendation is pairing the LoE-366 and the i89 together – with this combination every Climate Solutions window and door is guaranteed to exceed Energy Star standards.

If you have any questions don’t hesitate to get in touch via our online contact form or call in on 1.847.233.9800.

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