The Pros and Cons of Vacuum Glass


Vacuum glass is an ideal material for use in sash windows, offering greater energy efficiency compared to standard insulated glazing and also being lighter and smaller in terms of frame load. Tips on What is Vacuum glazing?

This study presents a novel method of detecting vacuum degrees in vacuum glasses by employing digital holography. This system includes an optical path for digital holographic interferometry and an exquisitely fabricated optical pressure sensor.

Energy Efficiency

Vacuum-insulated glass (VIG) is a cutting-edge glazing solution that offers numerous energy efficiency benefits, including reduced heating and cooling costs by insulating buildings’ interiors from temperature swings, as well as helping reduce greenhouse gas emissions. Furthermore, VIG can be combined with other advanced technologies, like electrochromic glass or photovoltaic solar glass panels, for even more efficiency in terms of energy conservation.

Vacuum glass production involves precise machines and processes. To ensure the optimal thermal performance of the final product, vacuum levels must be kept consistent throughout the show. This is why it is essential that, when purchasing vacuum glass, it comes from a reliable producer such as Morn. Our factory meets and surpasses all industry production standards for optimal vacuum glass manufacturing!

A vacuum between glass panes creates an airless space that enhances insulation properties while preventing moisture from seeping into its gaps, which could otherwise cause bowing and frame damage.

Compared to regular insulating glass windows, vacuum-glazed windows offer improved insulation and can be up to four times more energy efficient than the former. Plus, their lightweight construction requires less framing material, helping cut costs in terms of construction.

VIG panels’ lack of an air layer between panes increases acoustic insulation and soundproofing properties, making them especially helpful in homes located in noisy areas. Furthermore, VIG production requires no harmful chemicals like lead or mercury, which makes it an excellent choice for green and sustainable buildings.

A vacuum created by inserting a spacer between two panes of glass acts as an insulator against cold air from outside and warm air from within, creating better thermal insulation and providing a more pleasant living environment. Furthermore, energy savings resulting from this practice can significantly lower operating costs while contributing towards environmental protection.

Numerous techniques have been devised for measuring the vacuum degree of vacuum glass, including photoelastic and thermal conductivity detection. Unfortunately, these methods are limited by their sensing accuracy; they are only able to detect changes in the stress spots of their support structure. To overcome this limitation, an optical pressure sensor based on digital holography was implemented, providing nondestructive precision measurement without physical contact between the sensor and the object.


Vacuum glass is generally safe to use. However, certain precautions must be taken when working with vacuum systems: always wear PPE when handling any glassware that could break or shatter, especially when dealing with high- or ultra-high-pressure viewports rated for vacuum service, as they must be taken carefully to prevent accidental internal pressure buildup, which could result in implosion and injury to system operators or laboratory personnel.

Safety in vacuum-insulating glass is achieved using low-temperature metal sealing technology and fully tempered glass, combined with low-temperature metal sealing technology and fully hardening each pane of glass. The resultant fully-tempered glass offers more excellent impact and wind pressure resistance than standard insulated glasses, while its metal seal reduces spontaneous glass shattering incidents.

When purchasing vacuum glass products, it is crucial to use only qualified suppliers. A top provider should have an effective quality management system in place as well as experience producing large volumes. Furthermore, they should have been certified by an external organization as meeting all national standards for vacuum glass production.

Researchers should take care when using the Schlenk line, a special apparatus designed for manipulating air- and moisture-sensitive compounds. As part of their training process, researchers must only operate it under direct supervision by their principal investigator or an experienced senior researcher. Furthermore, researchers must be instructed in assembling and manipulating glass apparatus or equipment containing sharps (e.g., autoclaves, automated dishwashers, or microtome tissue slicers).

Accu-Glass Products’ high and ultrahigh-pressure vacuum viewports are ideally suited to observe vacuum chamber experiments directly. These viewing ports can be mounted to multiple vacuum systems and utilize various glass materials, like Corning 7056 borosilicate glass or fused silica, depending on which mount type you select. Furthermore, depending on which mount type is selected, these viewports are either high- or ultrahigh-pressure operation rated with differential pressure ratings up to 15 PSIG for differential pressure relief devices that prevent rapid internal pressurization to protect system operators as well as minimize potential damage or injuries to laboratory personnel.


Vacuum glass is an energy-efficient and long-term product. It can be used either as a single pane of glazing or one of three layers in a triple-glazed unit, as well as restoration projects, because it makes older windows as energy efficient as newer ones. But like any product, vacuum glass does have its own set of drawbacks; to make an informed decision, it’s essential to carefully research all available options and select a supplier with proven credentials.

VIG is an advantageous insulating glazing (IG) product due to its long lifespan. Comprised of two glass panes separated by an evacuated gap at pressures no more significant than 0.001 Torr, VIG significantly decreases thermal transfer by eliminating air conduction and convection between them, thus decreasing thermal transfer while improving insulation efficiency by reducing U value to less than 0.5.

VIG can withstand dynamic loads like impact and earthquakes more effectively than monolithic glass due to having no air to compress during an event and has faster load absorption rates than monolithic glass, thus decreasing the chances of critical flaws and increasing resistance against stress concentrations. Furthermore, VIG features metal seals explicitly designed to sharpen crack tips to provide additional stress concentration resistance.

VIG offers another advantage by requiring fewer maintenance steps than other IG products, thanks to the low thermal conductivity and absence of air within its hermetic seals. Furthermore, its use eliminates the need for regular re-sealing or lubrication of moving parts, leading to more excellent long-term performance and reliability.

VIG quality can be measured through its careful manufacturing process and use of specialty materials, making it one of the highest-grade products available today. When selecting a manufacturer of vacuum insulated glass (VIG), look for one with an ISO quality management system, sufficient production capacity, experience working with large enterprise applications, regular inspections/testing procedures to maintain hermetic seal integrity, as well as an expert team to evaluate durability using mechanical tests which measure the tensile stress at points of impact; this data can then be compared with stress plots to determine the cause of failures or their motivations


Vacuum glazing can be the ideal solution for refurbishment projects at historic buildings and listed properties where insulation needs to be improved without significantly altering aesthetics. Being far thinner than traditional double-glazing solutions, vacuum glazing is easy to fit into existing frames without significant modifications or lengthy planning application processes being necessary.

Vacuum insulation fills the space between panes with an effective thermal and sound insulator that keeps heat inside while noise remains outside, making it the ideal replacement for traditional double-glazing, which features an approximate 3mm gap between panels. Furthermore, its narrow profile means it can easily fit sash windows without modifying their frame.

Vacuum-insulated windows are significantly more energy efficient than traditional double-glazing, making them particularly suitable for historic and period properties where conservation officers might object to thicker modern double-glazing units. Their thinness means no visible frames or gaps, and they look like one piece of clear glass!

Due to their superior insulation performance, vacuum-glazed units are also much lighter than traditional double-glazing. This makes them easier to open and close and means one larger unit can often replace multiple smaller ones in a space where multiple smaller ones would generally need to be fitted – particularly beneficial when dealing with sash windows where multiple small units can present challenges in terms of trying to balance it open or closed.

Panasonic has established an industry benchmark with their LandVac tempered vacuum insulated glass product, boasting industry-leading insulation performance with an attractive surface appearance. This feat has been achieved using their exclusive sealing method, which prevents protrusions on its surface from forming bubbles on its surface, making the sash window versions even more desirable due to the removal of the plug and transparent “pillars for supporting vacuum layers.”

Read also: Collectible Glass Insulators