Cooling Our Homes Without Electricity?

Summary

The video discusses the urgent need for alternative cooling technologies due to the environmental impact of air conditioning. It introduces MIT's ICER, an innovative cooling system using aerogel that combines insulation, evaporation, and radiative cooling without electricity or emissions. The potential applications of aerogel in reducing energy consumption and prolonging food shelf life are explored, alongside the challenges of aerogel production and cost. The script also highlights the development of aerogel-based insulation for windows, funded by ARPA-E, and its potential to revolutionize cooling systems.

Takeaways

• 🌡️ The increasing demand for cooling due to rising temperatures is causing a positive feedback loop that exacerbates global warming.
• 🔌 Air conditioning and electric fans account for 20% of the world's electricity consumption, with a projected tripling of AC units by 2050.
• 🌍 Cooling demand was responsible for 16% of all energy used in buildings worldwide, highlighting the significant energy and environmental impact of air conditioning.
• 🌡️ Air conditioning contributes to CO2 emissions, with indirect emissions more than doubling between 1990 and 2021, and releases potent greenhouse gases like HFCs.
• 🏰 Historical passive cooling methods, such as wind catchers and courtyards, have been used for thousands of years to manage indoor temperatures without electricity.
• 🛠️ MIT researchers propose a new cooling system called ICER, which combines insulated cooling, evaporation, and radiation without the need for electricity or emissions.
• 🌞 ICER uses aerogel, a highly effective thermal insulator, and hydrogel to facilitate evaporative cooling and radiative cooling to lower temperatures.
• 💧 Hydrogel in ICER consumes only water, which can be easily replenished, and can function unattended for over 10 days in most cases.
• 🔄 ICER's reflective base layer prevents heat absorption, and its aerogel layer allows for radiative cooling, making it a promising alternative to traditional AC systems.
• 📈 Despite successful small-scale testing, the production of aerogel is currently expensive and not scalable, presenting a challenge for widespread adoption.
• 🌱 Alternative aerogel materials, like cellulose nanocrystals, offer potential for more cost-effective and scalable production methods for passive cooling solutions.

Q & A

What is the main issue with our current reliance on air conditioning for cooling?

The main issue is that air conditioning contributes significantly to CO2 emissions and energy use, with 20% of the world's electricity spent on powering air conditioning and electric fans. This also leads to a positive feedback loop where increased demand for cooling leads to hotter days and more energy use.

What is the projected increase in the number of AC units by 2050 according to the Clean Cooling Collaborative?

The global number of AC units is projected to triple by 2050 due to intensifying temperatures and increasing demand for cooling.

What is the ICER system proposed by MIT researchers and how does it differ from traditional air conditioning?

The ICER (Insulated Cooling with Evaporation and Radiation) system is a three-pronged approach to cooling that combines insulated cooling, evaporative cooling, and radiative cooling into one package. Unlike traditional air conditioning, it does not consume electricity or produce carbon emissions.

How does the aerogel layer in the ICER system contribute to cooling?

The aerogel layer in the ICER system acts as an excellent thermal insulator due to its extremely low density and tiny pores, which restrict the flow of heat. It also allows infrared radiation to pass through, enabling radiative cooling.

What is the role of hydrogel in the ICER system?

Hydrogel, which is full of water, serves as the evaporative cooling component in the ICER system. As it evaporates, it takes heat away from the system, and the process can be sustained by simply adding water when it dries out.

How does the mirror-like base of the ICER system help in cooling?

The mirror-like base of the ICER system reflects sunlight back through the layers above it, preventing the device's materials from heating up and thus enhancing the cooling effect.

What are the potential applications of the ICER system beyond residential cooling?

Beyond residential cooling, the ICER system could be used to retrofit existing air conditioners to improve their efficiency, preserve food on off-grid farms without the need for energy, and potentially extend the shelf life of produce in areas with limited access to traditional cooling systems.

What is the current challenge in the mass production of aerogel-based cooling systems like ICER?

The current challenge is the cost and complexity of producing aerogel, particularly polyethylene aerogel (PEA), which requires a delicate operation known as critical point drying (CPD) that uses expensive special equipment and is not yet scalable.

What alternative to polyethylene aerogel (PEA) is mentioned in the script, and how is it produced?

An alternative to PEA mentioned in the script is cellulose nanocrystal aerogel (CNC), which is produced using freeze drying in a process that can be scaled up and is more robust and reflective than PEA.

How does the anisotropic cooling aerogel (ACA) differ from isotropic materials in terms of thermal insulation?

Anisotropic cooling aerogel (ACA) has highly aligned pores that provide better thermal insulation than isotropic materials, whose properties are even and identical in all directions. ACA's structure allows for more consistent and effective insulation.

What is the significance of the MIT's transparent silica aerogel in window insulation?

MIT's transparent silica aerogel is significant because it can be used to replace the air gap in double-pane windows, making them 40% more insulating than traditional ones. This could greatly improve the energy efficiency of windows and reduce energy loss.

Outlines

00:00

🌡️ Cooling Technology and the MIT Aerogel Breakthrough

The script discusses the necessity of cooling technologies for regulating temperatures of food, medicine, and human environments amidst increasing global warming. It highlights the problematic reliance on air conditioning, which contributes to a positive feedback loop of rising temperatures and energy consumption. The Clean Cooling Collaborative reports that 20% of global electricity is used for cooling, with a projected tripling of AC units by 2050. The International Energy Agency notes that cooling demand accounts for 16% of energy use in buildings, with significant CO2 emissions. The script introduces an alternative: a passive cooling system called ICER, developed by MIT researchers, which combines insulated cooling, evaporation, and radiation without electricity or emissions. The system utilizes aerogel, a highly effective insulation material, to create a cooling panel that operates similarly to a solar panel but for cooling purposes.

05:01

🚀 The ICER System: Aerogel, Hydrogel, and Reflective Base

This paragraph delves into the construction and functioning of the ICER system. The top layer consists of aerogel, an ultra-light and highly insulating material, which is followed by a hydrogel layer that serves as an evaporative cooling agent. The hydrogel consumes water as its only resource, and the system can operate for over 10 days without maintenance. The base layer of ICER is reflective, preventing heat absorption and enhancing the system's cooling capabilities. The script also discusses the scalability and potential applications of ICER, such as improving existing AC systems or preserving food on off-grid farms. The system has shown a 300% improvement over traditional radiative coolers in tests, achieving a temperature drop of 9.3°C below ambient under direct sunlight.

10:04

🌳 Aerogel Variants: PEA, CNC, and ACA in Passive Cooling Applications

The script explores different types of aerogels and their applications in passive cooling. It compares polyethylene aerogel (PEA), which is currently expensive to produce, with cellulose nanocrystal aerogel (CNC), which is more robust and easier to produce using freeze drying. The paragraph also introduces anisotropic cooling aerogel (ACA), inspired by 3D printing techniques, which offers superior insulation due to its aligned and consistent pore dimensions. Studies have shown that these aerogel-based coolers can significantly reduce energy consumption in buildings and have potential in window insulation, as demonstrated by the SHIELD program and MIT's development of transparent silica aerogel for windows.

15:05

🔍 The Future of Aerogel in Cooling Systems and Energy Efficiency

The final paragraph reflects on the potential impact of aerogel on cooling systems and energy efficiency. It acknowledges the challenges of cost and scalability in the widespread adoption of aerogel-based cooling solutions. Despite these hurdles, the script remains optimistic about the future of aerogel in architecture, particularly in window insulation, where it has already begun to make an impact with companies selling aerogel-integrated windows. The script invites viewers to share their thoughts on the potential of aerogel and whether they would consider retrofitting their AC systems with such panels, and it concludes with thanks to patrons and viewers for their support.

Keywords

💡Cooling tech

Cooling technology refers to any system or method that lowers the temperature of an environment. In the video, it is highlighted as essential for regulating the temperature of food, medicine, or people. The script discusses the need for alternative cooling methods due to the energy consumption and environmental impact of traditional air conditioning systems.

💡Positive feedback loop

A positive feedback loop is a process that amplifies an initial condition, leading to a self-reinforcing cycle. In the context of the video, it refers to the increasing demand for cooling as temperatures rise due to climate change, which in turn increases energy use and contributes to further warming.

💡Aerogel

Aerogel is a synthetic porous ultra-lightweight material derived from a gel, where the liquid component of the gel has been replaced with a gas. The video script describes it as 'one of the finest insulation materials available,' highlighting its use in the ICER system for thermal insulation and radiative cooling.

💡Passive cooling

Passive cooling is a method of temperature regulation that does not require mechanical systems or electricity. It is achieved through architectural design elements that control heat loss and gain. The script mentions historic examples and discusses how the ICER system incorporates passive cooling techniques.

💡ICER

ICER stands for Insulated Cooling with Evaporation and Radiation. It is a system designed by MIT researchers that combines these three elements for an efficient cooling method. The script explains how ICER functions as an alternative to traditional air conditioning.

💡Thermodynamics

Thermodynamics is the branch of physics that deals with heat and its transformation to and from other forms of energy. The script uses the principles of thermodynamics to explain how the ICER system works, particularly in the context of insulated cooling, evaporative cooling, and radiative cooling.

💡Evaporative cooling

Evaporative cooling is a cooling effect that occurs when water evaporates, taking heat away from the surface and lowering the temperature. The video script describes this process as a natural method of cooling that ICER leverages by using hydrogel to absorb heat as it evaporates.

💡Radiative cooling

Radiative cooling is the process by which a body loses heat by radiating it as thermal radiation, often into space. The script explains how ICER uses radiative cooling to lose heat through thermal radiation, especially with the top layer of aerogel that allows this process to occur.

💡Hydrofluorocarbon refrigerants (HFCs)

Hydrofluorocarbon refrigerants are chemicals used in air conditioning systems for cooling. The video script points out that HFCs are potent greenhouse gases that contribute to atmospheric pollution and climate change, making the development of alternative cooling technologies like ICER important.

💡Anisotropic

Anisotropic materials have properties that are not identical in all directions, unlike isotropic materials. The script discusses anisotropic cooling aerogel (ACA), which has aligned pores that make it a better insulator than isotropic aerogels, demonstrating the importance of material structure in thermal insulation.

💡Sustainable cooling

Sustainable cooling refers to cooling methods that have minimal environmental impact and are energy-efficient. The video script emphasizes the need for sustainable cooling solutions like ICER to reduce the carbon footprint and energy consumption associated with traditional air conditioning.

Highlights

The need for cooling technology is increasing due to hotter days and surging demand for cooling.

Air conditioning contributes to a positive feedback loop, exacerbating global warming and increasing energy demand.

20% of the world's electricity is used for air conditioning and fans, with usage projected to triple by 2050.

Cooling demand accounted for 16% of all energy used in buildings worldwide in 2021, equivalent to 2,000 TWh.

Air conditioning is a major contributor to CO2 emissions, with indirect emissions more than doubling between 1990 and 2021.

AC units release hydrofluorocarbon refrigerants (HFCs), which are thousands of times more potent as greenhouse gases than CO2.

Passive cooling methods, such as 'wind catcher' towers and courtyards, have been used historically to manage indoor temperatures without electricity.

MIT researchers propose a new cooling system called ICER that combines insulated cooling, evaporation, and radiation.

ICER operates like a solar panel, using the sun's rays to produce cooling instead of energy, with no power or emissions.

Insulated cooling slows the flow of heat, evaporative cooling uses water to lower temperatures, and radiative cooling emits heat into space.

Aerogel, a material used in ICER, is extremely lightweight and effective for thermal insulation due to its low density and tiny pores.

ICER's top layer of aerogel allows for both insulation and radiative cooling, while its hydrogel layer uses water evaporation for cooling.

ICER's mirror-like base reflects sunlight, preventing the device from heating up and enhancing its cooling capabilities.

ICER has been tested on a small scale and showed a 300% improvement over a radiative cooler, reaching 9.3°C below ambient temperature under direct sunlight.

ICER could be used to retrofit existing air conditioners, improving their efficiency and reducing electricity consumption.

Aerogel-based cooling could extend the shelf life of produce in food storage, especially in regions with limited water or energy for traditional cooling systems.

Manufacturing aerogel is currently expensive and not scalable due to the critical point drying process required for polyethylene aerogel (PEA).

Alternatives to PEA, such as cellulose nanocrystal aerogel (CNC), are being developed using freeze drying, which is scalable and cost-effective.

Aerogel's insulating properties are being explored for use in windows to improve energy efficiency, with some companies already selling aerogel-incorporated windows.

The challenge for widespread use of aerogel in cooling systems is reducing costs and scaling up production beyond lab testing.

Transcripts

Whether it’s to regulate the temperature of food, medicine, or people, we’ll always

need some form of cooling tech to survive.

We tend to turn to air conditioning to solve these problems, but that has us stuck in a

positive feedback loop that isn’t at all positive.

Hot days are becoming hotter, and the demand for cooling is surging.

How do we break the cycle?

A team of researchers from the Massachusetts Institute of Technology have an idea: stack

the same cooling techniques we’ve been using for thousands of years by harnessing the power

of aerogel.

No power, no emissions…no problem?

I’m Matt Ferrell … welcome to Undecided.

Before we get into MIT’s aerogel proposal, it’s important to discuss why curbing our

AC addiction necessary.

It’s because the way things are going, we probably shouldn’t be keeping our cool about

how we keep ourselves cool.

According to the Clean Cooling Collaborative, 20% of the world’s electricity is spent

powering air conditioning and electric fans, and as temperatures intensify, usage is increasing.

At this rate, the global number of AC units is projected to triple by 2050.

The International Energy Agency reports that last year in particular saw cooling demand

account for about 16% of all energy used in buildings worldwide — about 2,000 TWh.

The problem isn’t just a matter of energy use, either.

Air conditioning is a major contributor to CO2 emissions.

The indirect CO2 emissions from cooling buildings more than doubled between 1990 and 2021 — to

about 1 Gt.If that wasn’t bad enough, AC also releases hydrofluorocarbon refrigerants

(HFCs), which pollute the atmosphere even more.

And they’re thousands of times more potent as a greenhouse gas than CO2.

That said, air conditioning isn’t our only option.

People have been using natural methods of staying comfortable indoors for thousands

of years.

We can see them in historic buildings all over the world, from the “wind catcher”

towers in the Middle East and North Africa to the courtyards in China and Spain — and

the “sleeping porches” in the American South.

These structures aren’t just for show.

They’re examples of passive cooling: architectural elements that control both the loss and gain

of heat.

So, managing a building’s temperature without consuming electricity _or_ producing carbon

emissions is nothing new.

But when it comes to modern alternatives to air conditioning, the passive cooling system

presented by MIT researchers in September is unique for its three-pronged approach.

The design combines “insulated cooling with evaporation and radiation” into one convenient

package called ICER.

It sounds a bit like a frozen drink maker, but it’s more like a solar panel that uses

the sun’s rays to produce cooling rather than energy.

Let’s break down what that all means.

To start, it’s important to remember that heat is our literal fair weather friend.

It leaves when we need it in the winter, and intrudes when we want to avoid it in the summer.

The good news: even though we can’t change the ways of an unreliable person, we can get

around the way heat behaves with the power of thermodynamics.

Here’s how ICER does that.

First, the “IC” is for insulated cooling.

Generally speaking, insulation slows down the flow of heat from warmer areas to colder

ones.

As for “E,” evaporative cooling is the process of water lowering the temperature

of a surface when it absorbs enough heat to change from liquid to gas, which we experience

whenever we sweat.

Lastly, “R”: radiative cooling is the loss of heat through thermal radiation, like

when the Earth radiates heat out into space.

This is what causes the chill we feel on cloudless nights, and it’s also how the people of

Iran and India managed to make ice long before we could pop a tray into the freezer.

In the context of reducing our reliance upon air conditioning, there’s promising developments

on the use of radiative sky cooling to effectively shoot heat into space.

I talked about how radiative cooling is being implemented in a previous video.

It 's pretty cool.

The MIT researchers behind ICER, though, do note that high-performance radiative cooling

is typically limited to specific climate conditions.

So now

that

we know the principles ICER operates on, how does it work?

You can think of it like an open-face sandwich.

On the top is a layer of aerogel.

Aerogel is basically what you get when you put a gelatin mold into a dehydrator (assuming

you like the taste of plastic).

Normally, doing that would just reduce your dessert to the powder you started with.

The magic of aerogel is that it retains its shape even after its initial gel form loses

all its moisture.

The result is a solid but extremely light chunk of what NASA calls “one of the finest

insulation materials available.”

This is because aerogel is like a sponge, but with pores too tiny for the human eye

to see.

They make up 95% of aerogel’s volume, giving it a very low density.These pores are smaller

than human hair; about the same size as air molecules.

Air has low thermal conductivity, meaning that it’s difficult for heat to pass through

it.

So, as a result of all these factors, air doesn’t have much space to flow freely through

aerogel, making it very effective in thermal insulation — effective enough to use while

exploring the cold void of space.

Speaking of space, infrared radiation passes right through aerogel.

That’s why ICER’s top layer can both insulates and allow for radiative cooling.

Hydrogel is the next layer of the ICER sandwich.

As the name implies, it’s the wet sponge to aerogel’s dry sponge: full of water instead

of air.

This water is the singular resource that ICER consumes.

As it evaporates over time, it rises past the aerogel and out into the open, taking

heat with it.

When the hydrogel eventually dries out, recharging the ICER is simple: All it needs is someone

to “just add water.”

The researchers estimate that the setup can continue to function unattended for more than

10 days in most cases, or even over a month on the U.S.’s west coast.

In hot, arid regions like Las Vegas and Phoenix, a single “charge cycle” can last about

four days.

Beneath the hydrogel lies ICER’s third and final layer, which is its mirror-like base.

It reflects sunlight back through the layers above it, preventing the device’s materials

from heating up.

ICER’s aerogel is highly reflective, too, providing even more resistance against the

sun’s heat.

So far, ICER has only been tested on a small, 10 cm-wide scale, on top of a MIT building’s

roof.

However, the results were significant.

The researchers reported that even under poor weather conditions, ICER’s capabilities

represented a 300% improvement upon a radiative cooler.

This amounted to ICER reaching 9.3 C below the ambient temperature under direct sunlight.

Beyond its potential as a standalone cooling system, ICER could also be used in retrofitting

existing air conditioners to improve their efficiency.

Its inventors reference a 2017 Stanford University study that used radiative cooling panels to

lower the temperature of running water.

Using a simulation, Stanford researchers estimated that these panels could reduce the electricity

consumption of an office building’s AC system by 21%The MIT team predicts that ICER could

save even more energy when integrated in a similar way.This means that ICER might not

necessarily need to replace an air conditioner, allowing us to work with what we’ve got.

Meaning this could be an additive solution instead of a replacement.

ICER could also make a big impact on the way that we store food.

One possible application is the preservation of fruit and vegetable crops on off-grid farms,

no energy necessary.

The researchers calculated that cooling food containers with ICER could extend the shelf

life of produce by about 40% in humid areas and over 200% in drier ones.

Especially in regions where traditional cooling systems are restricted by a lack of water

or energy, ICER could theoretically prolong the shelf life of food when it would otherwise

spoil.It would be like having a cooler that cools itself.

But don’t throw your ice packs out just yet.

Manufacturing polyethylene aerogel, or PEA, is unfortunately more complicated than sticking

wobbly jelly into a drier.

It’s a delicate operation that requires slowly removing solvents without compromising

the structure of the gel.

This is accomplished through critical point drying (CPD), which uses expensive special

equipment.

And as the researchers note, the CPD process isn’t yet scalable.

Long story short, producing the aerogel that the ICER depends on is not cheap.

But there’s still room for optimism.

I mean … that’s what motivates me around all of the videos I make.

ICER’s aerogel component is the only one that isn’t freely available right now, but

that might change as aerogel becomes more popular as a material for tech like supercapacitors

and batteries.In the meantime, the MIT team is seeking out a viable way to cut down on

costs.

This could look like using freeze drying rather than CPD during production or swapping the

PEA with a different kind of insulation altogether.

In fact, we already know this is feasible.

Researchers from Nanjing Forestry University in China and the University

of Applied Sciences and Arts in Germany have also designed an aerogel-based passive cooler

that blends radiative cooling and thermal insulation.

Like ICER, it reflects sunlight, releases absorbed heat, and provides thermal insulation

without any electricity.The difference is that their aerogel is composed of cellulose

nanocrystals and just so happens to be made using freeze drying in a process that _can_

be scaled up.

How does cellulose nanocrystal aerogel, or CNC, compare with PEA?

Well, hopefully all this talk about jelly and sandwiches hasn’t gotten you too hungry,

because here’s another food analogy.

Marshmallows are a lot like aerogel: they’re made of gelatin, and they’re full of air.

When marshmallows are cooked in a microwave, they inflate.

PEA poofs up in a similar way as it’s made.

In both cases, you end up with a big, fluffy solid full of trapped air, but you can’t

do much to change its shape.

CNC is another story.

It’s more like a soft serve ice cream cone, which you carefully turn to form its iconic

twisted look.

When producing CNC, scientists have a similar level of control over its structure as they

direct the bonding of compounds that make it up.

Like other types of aerogel, CNC has low thermal conductivity.

However, gel-based networks of chemicals tend to be brittle, and cellulose nanocrystals

are more robust.

The CNC created for this particular study is also white and highly reflective.It doesn’t

hurt that cellulose is the most abundant biopolymer on earth, either.

But did the cellulose aerogel perform as well?

Turns out, the results published by the joint research team in May are very similar to ICER’s.

To refresh your memory, ICER’s cooling was powerful enough to reach 9.3 C below the ambient

temperature under direct sunlight.The CNC-based cooler managed a drop of 9.2 C under direct

sunlight and roughly 7.4 C in what the researchers call “hot, moist, and fickle” weather.

And using modeling, the researchers estimated that their CNC cooler could reduce energy

consumption in China-based buildings by about 35%.

Aerogel is clearly a valuable resource in the realm of thermal insulation.

But how does it compare against existing insulating materials in the real world?

In a study published in September, a group of researchers from universities in China

and Australia put their own formula to the test.

Called anisotropic cooling aerogel, or ACA, it’s produced with freeze drying like CNC.

What makes ACA’s development different, though, is that it’s inspired by 3D printing.

The researchers built their aerogel panels block by block the same way a 3D printer builds

an object in layers.

This provided them with enough precision to keep the dimensions of the gel’s pores “aligned”

and consistent in their dimensions.

As for what “anisotropic” means and why it matters, most materials are either isotropic

or anisotropic.

If something is isotropic, its properties are even and identical throughout, regardless

of the direction you measure it — nice and predictable, like bulk glass and metals.

Otherwise, a material is anisotropic, meaning that its properties aren’t even or identical.

Wood is a classic example.

It’s stronger along its lines or “grain” than against it.According to the researchers,

anisotropic aerogels with highly aligned pores act as better insulators than isotropic ones,

so it’s worth finding ways to produce them.

And the ACA did deliver.

When the team placed the gel on a hot plate heated to 90 C, its top surface eventually

remained steady at a temperature of about 41 C. By comparison, two existing insulation

products, EPS foam and silica aerogel, became 6 and 10 degrees C hotter than the ACA, respectively.

In another series of tests, the researchers measured the ACA’s thermal insulation capacity

on a hot and humid day in Hong Kong.

Under direct sunlight, the ACA panel maintained a lower interior temperature than four other

insulation materials: brick, glass, EPS foam, and silica aerogel.

The ACA also demonstrated passive cooling with a drop of 6.1 C below ambient temperature.

These experiments offer an exciting look into aerogel’s capacity for passive cooling.

Even so, it’ll be some time before mass production of aerogel coolers is practical.

In most cases, aerogel panels can be as much as 10 times more expensive than traditional

insulation materials, whether they’re composed of silica or cellulose.Aside from cost, the

majority of testing has only been done on a lab scale.

That’s not to say aerogel is lightyears away from existing in our homes and workspaces.

Its insulating properties are also useful in another essential part of architecture:

windows.

Poorly insulated windows can be more wasteful than you might think.

According to MIT, each winter, windows across the U.S. lose enough energy to power over

50 million homes.

To address this problem, the U.S. government’s Advanced Research Projects Agency-Energy (ARPA-E)

began funding the production of materials that improve the energy efficiency of windows

in a program launched in 2016.The 14 teams in the Single-Pane Highly Insulating Efficient

Lucid Designs or SHIELD program are developing products to apply to window panes and new

window pane designs for retrofitting.

Of these 14, four projects involve aerogel.

And in 2019, MIT announced its success at fabricating a transparent form of silica aerogel.

The research team estimated that a double-pane window with its air gap replaced by its aerogel

panel would be 40% more insulating than traditional ones.

Aerogel-based insulation has already left the lab.

At this point, there’s a couple companies that sell windows incorporating aerogel into

their construction or aerogel-based glazing that can be applied to windows and glass roofs.

We’re long past wondering whether passive cooling with aerogel is possible.

The hurdle at hand is eliminating barriers to widespread use.

So are you still undecided?

Do you think aerogel is going to make an impact on cooling systems?

And would you want to retrofit your AC with one of these cooling panels?

Jump into the comments and let me know.

And be sure to check out my follow up podcast Still TBD where we'll be discussing some of

your feedback.

If you liked this video, be sure to check out one of these videos over here.

And thanks to all of my patrons for your continued support.

You’re helping to make these videos possible.

And thanks to all of you for watching.

I’ll see you in the next one.