Good Sleep Changes Everything
Hot summer nights across Europe are hard to sleep through, particularly with high humidity that makes you sweat more. European buildings have been built for winter warmth, so they can be hot and uncomfortable at night in summer heatwaves.
The traditional solution is a split air-conditioners. However, they are expensive to buy, costly to run, unhealthy, and bad for the environment. They seal you inside with stale, recirculated air and warm the planet through refrigerant leaks, fossil fuel electricity and waste heat.
In most apartment buildings, you need permission from the body corporate. This can be tediously difficult to obtain. Especially in France, Switzerland, parts of Italy, Greece and even Spain, you need permission from the local planning authority. Another nightmare.
Coolzy is the smarter, healthier and sustainable alternative and no permits are needed at all. Coolzy is a compact personal cooler that targets you directly rather than wasting energy cooling walls, furniture and floors. It runs near-silently on 80% less electricity, just 340 Watts, while you sleep with your windows open for fresh air ventilation. Coolzy helps you to regain your natural adaptation to hot weather so you feel more comfortable with less cooling.
Coolzy costs a fraction of a split system and can run overnight on affordable solar batteries. It is available today with no waiting, no installation, and no ongoing service bills.
Read more to learn why Coolzy is the best choice for healthy sleeping in summer.
Compare Cooling Solutions for Summer Sleep
Why is Coolzy better?
For normal healthy sleep, you need cooling, gentle noise to screen out disturbing noises, and natural fresh air. Coolzy is not only better for your health, it is also the most sustainable and economic cooling technology around.
Good sleep changes everything!
← Swipe to compare →
| Coolzy | Split AC | Traditional Portable AC | Ceiling Fan | Pedestal Fan | Mini Evaporative Cooler | |
|---|---|---|---|---|---|---|
| Enough cooling (>5°C) | ✓ | ✓ | ✕ | ✕ | ✕ | ✕ |
| No Permit Needed | ✓ | ✕difficult to obtain | ✓ | ✓ | ✓ | ✓ |
| Quiet | ✓ | ✓ | ✕ | ✓ | ✓ | ✓ |
| Natural fresh air | ✓ | ✕ | ✕ | ✓ | ✓ | ✓ |
| Low price | ✓ | ✕ | ✓ | ✓ | ✓ | ✓ |
| Low electricity cost | ✓ | ✕ | ✕ | ✓ | ✓ | ✓ |
| Low environment impact | ✓ | ✕ | ✕ | ✓ | ✓ | ✓ |
| Easily moved | ✓ | ✕ | ✕ | ✕ | ✓ | ✓ |
Note: Split air-conditioners do not provide any fresh air: windows and doors remain closed. Stale room air with odours, methane and carbon dioxide is recirculated all the time.
Traditional portable air-conditioners provide only ~4°C cooling at best
Sticky sweaty nights?
It’s hot and suddenly sleeping is a challenge. Summer nights in many European homes can be miserable without cooling. Sleepy and tired, you face a restless sweaty night, sheets clinging, and you start the next day exhausted. And if that weren’t bad enough, mosquitoes can make it even worse.
Our bodies need to cool off to fall asleep, and that requires a temperature below 30°C (27°C if there’s no fan). Unless you’re acclimatized to the heat, you’ll likely need a temperature below 25°C.
Split air conditoners are not only unhealthy: every split air conditioner is warming the planet every day, even if it is not used.
Split air conditioners require regular servicing by a trained technician. Wearing protective clothing is essential because filters accumulate dead skin particles and pathogens over months of use.
Unhealthy Split Air Conditioners Warm the Planet
Many European homes have split air-conditioners in the bedroom. They are effective at cooling but come with hidden pitfalls.
Windows have to remain tightly closed so room air recirculates and CO2 accumulates along with methane and body odours. Pathogens and skin flakes accumulate in the filters. Technicians have to take special precautions during the six-monthly or annual servicing to clean out that gunk.
European standards require bedrooms to receive a roomful of fresh air every hour for one person: split air-conditioners provide no fresh air at all.
Even worse, every split air-conditioner is warming the planet, little by little, every day, even if it remains unused. Kilowatts of heat from the outdoor unit heat your suburb and city. Refrigerant gases leaking from split air-conditioners are warming the climate, hundreds or thousands of times more than the equivalent amount of CO2.
Costs and Waiting Time
Few people adjust their thermostat from its minimum setting, thinking that will cool the room faster. And the bills mount up: 200 € or more monthly for just a bedroom air-conditioner. Most of the money is wasted on cooling concrete and bricks. Less than 10% of that cooling reaches you.
You will need a split aircon in every room where you plan to hide out in summer: at least 2,000 € installed.
Yes, you can run your split air-conditioner off solar panels during the day. However, most night-time electricity is generated by burning fossil fuels, releasing tons of CO2 over a ten year lifetime. A battery large enough to run a bedroom split air-conditioner and other appliances through the night will cost upwards of 15,000 €.
Finally, if you try an order a split during a July heat wave, you will probably have to wait till the end of August for your installer to arrive.
Coolzy, the Modern, Healthy, Sustainable Alternative
Now there’s a new, far healthier, far more sustainable alternative. And, best of all, it’s far cheaper.
We invented Coolzy for Pakistan with one of the hottest summer climates, where daytime temperatures pass 50°C and most urban buildings hover around 40°C through the night.
Running on just 340 Watts, Coolzy concentrates the cooling on you, and does not waste electricity by cooling concrete and bricks.
Coolzy is almost silent at 41 dB on low speed, a far cry from those noisy old-style portables with clunky exhaust pipes. They were far too noisy to sleep with, and hardly cooled the room more than 3°C while using more electricity than split aircons. That’s not enough cooling for most Australian bedrooms.
Coolzy’s gentle white noise displaces other urban sounds and soothes you to deep sleep in minutes.
Coolzy provides up to 7°C cooling at your face (where it counts), as much as 10°C with the Igloo tent which also keeps out mosquitoes.
With your bedroom windows open, evening breezes carry away most of the CO2, methane, dead skin flakes and pathogens. In the morning, you wake refreshed to the sounds of birds singing with their mates. Coolzy is a far more healthy way to cool your summer nights.
Even more significant in the long run, Coolzy will help you regain your natural acclimatization to summer heat after 10 days or so. You will experience better cardiovascular health and feel more comfortable with less artificial cooling.
Coolzy is also far more sustainable. Coolzy uses a tiny amount of natural refrigerant with only slightly more warming potency than CO2 itself. Using up to 80% less electricity, three 120 A-h lithium batteries will store enough of your daytime solar electricity, costing only 1,200 € or so.
You might even find Coolzy is a little too cool, so keep a blanket handy!
Video: Coolzy Running Overnight
This video shows Coolzy running overnight in a standard bedroom.
Instead of cooling the whole room, Coolzy delivers targeted airflow toward the bed to help create a personal comfort zone. This approach uses less power than traditional air conditioning and can be especially effective when the room feels hot, still, or humid.
Because it doesn’t rely on sealing the room, doors and windows can remain slightly open for ventilation if desired. Quiet, compact, and low power, Coolzy is designed to support more comfortable sleep on warm nights.
No Waiting Start Saving Today
Order one online today before the heatwaves arrive. Plug it in, open the flaps and the cooling comes within a minute or so.
No more waiting for an hour for the bedroom to be cool enough. There’s no need for fancy phone apps to turn on your AC an hour before you arrive home.
Instead of spending thousands of dollars installing and running unhealthy old-fashioned air-conditioners that heat your suburb and the planet as well, buy a Coolzy today and start saving on your electricity bills.
Save the planet as well!
Winter warming?
And what about winter heating, you might ask. A reverse cycle split air-conditioner is a cost-effective room heater.
Hmm. Ever heard of warm woolly jumpers and blankets?
What makes Coolzy unique
- Instant cooling, no need to wait
- Smaller, lighter and easy to carry
- Sound 41 dB – 52 dB
- Only 50 – 100 €/month electricity cost, other conventional portable A/C’s cost 200 €/month or more (12 hours daily use)
- Concentrated cooling to the person
- Patented Focusing technology
- Highest Co-Efficient of Performance (CoP) on the market
How our portable A/C works
A compressor pushes refrigerant gas into a condenser heat exchanger where a fan blows air through the fins to cool the refrigerant gas so it condenses to a liquid. The liquid, still at high pressure, passes through a thin capillary tube or an expansion valve, reducing the pressure. The low pressure liquid is squirted into a second heat exchanger called the evaporator. Here the liquid evaporates into a cold gas, cooling air flowing past the tubes. The gas, now warmer, passes back to the compressor where it is compressed once again. More info.
The best portable airconditioning unit
Coolzy-Pro is a ProductReview.com.au awards winner for the Best Portable Air Conditioner in 2022, 2023 and 2024 based on customer reviews. After that, they gave up and conceded that Coolzy has no real competitors than can beat its performance!
What is the Difference Between Evaporative and Compressor Air Conditioners?
An evaporative air conditioner (normally called an air cooler), works by evaporating water into the room. This uses very little energy BUT it also is less effective AND it needs to be filled with water regularly. Air coolers do not work in high humidity.
A compressor-driven portable air conditioner uses refrigerant to cool the air. Compressor-driven portable air conditioners are more effective at cooling and work in all environments.
What are the advantages of a mobile portable air conditioner?
There are several advantages to using a mobile air conditioner like Close Comfort:
- Portability: Mobile air conditioners are designed to be portable, which means you can easily move them from one room to another. This is especially useful if you live in a small apartment or don’t have the space for a traditional air conditioning unit.
- Easy to Install: Mobile air conditioners are easy to install and don’t require any complicated setup. You simply plug them in, and they are ready to use.
- No Installation Required: Unlike traditional air conditioning units, mobile air conditioners don’t require any permanent installation. They don’t need to be mounted in a window or a wall, which means they are ideal for renters or anyone who doesn’t want to make any permanent changes to their living space.
- Energy-Efficient: Mobile air conditioners are typically more energy-efficient than traditional air conditioning units. They only cool the area where they are located, which means they use less energy overall.
- Cost-Effective: Mobile air conditioners are often more cost-effective than traditional air conditioning units. They are generally less expensive to purchase, and they use less energy, which means you’ll save money on your electricity bill.
- Eco-Friendly: Mobile air conditioners are often more eco-friendly than traditional air conditioning units. They use less energy, which means they produce fewer greenhouse gas emissions.
- Quieter: Mobile air conditioners are typically quieter than traditional air conditioning units. This is because they don’t have an outdoor compressor, which is the source of much of the noise associated with traditional air conditioning units.
Small air conditioners provide limited cooling. Therefore it’s important to understand this limitation and how to use these devices.
A small camping air conditioner cannot cool a whole room. A small room needs at least 10,000 BTU/hr cooling capacity because of it’s thermal mass (the walls and furniture). If you want to cool a small room, with no insulation, you will need at least 12,000 BTU/hr cooling capacity which would be a big, heavy (very un-portable) air conditioner.
A large room, with little or no insulation, will need ~18,000 BTU/hr to cool the whole space (more in hot conditions). This is highly impractical for renters as you won’t be able to remove the A/C.
An alternative is to focus the cool air to only cool the person (instead of the entire room). This saves energy and cost. A Coolzy uses patented focusing technology to focus a stream of cool air directly to the person as a result. The Coolzy’s focused cooling is much stronger than a regular A/C this is spending most of it’s energy trying to counter the effects of it’s super warming evacuation pipe..
A Coolzy requires only 340 Watts. It weighs only 15.4 kg and doesn’t always need to be vented. This makes it a truly mobile air con unit.
For information on using a Coolzy in an RV or caravan, click here.
Quiet Portable Air Conditioner - How noisy is it?
Quiet Portable Air Conditioner – How noisy is it?
Noise is usually stated as a number followed by ‘dB’, an abbreviation for ‘decibels’. It’s helpful to describe different perceived noise levels on a qualitative scale. Encyclopedia Britannica and noiseawareness.org provide the following common noise level descriptions:
| 90 dB | Loud bus interior, very noisy restaurant |
| 80 dB | Food mixer, blender |
| 70 dB | Busy street noise, loud telephone ringing |
| 60 dB | Sewing machine operating, several people talking |
| 50 dB | Person talking quietly, quiet pedestal fan |
| 40 dB | Quiet room, no one talking |
The perceived noise level also depends on the surroundings. For example, noise in a room will sound louder with bare walls and floor so that sound reverberates around the room. Carpets, curtains and soft furnishing will absorb much of that noise. For simplicity, listening to someone speaking across a room is hard for most people if the noise level is above 60 dB. Most people can sleep easily with background noise around 50 dB or less. In fact, many people find it hard to sleep without noise: they prefer some background noise to silence.
Also, the context of the noise can influence perceptions. For example, a sudden noise like a cup dropped on the floor can be very disturbing in the absence of background noise. In addition, we soon adapt to greater or lesser levels of background noise.
Some sounds have high pitch, or frequency, such as a whistle. Others have a low pitch, or low frequency, such as distant thunder. Speech has a mixture of medium frequencies. Sometimes you will see a noise rating specified as dBa or dBA. When many different frequencies make up the noise, the “A” weighting compensates for the way people hear different frequencies, so the rating is closer to the way the people will perceive sounds.
When it comes to an appliance like an air conditioner, the perceived noise level also depends on distance to the listener. Noise levels are often standardized at a distance of one metre, about three feet.
How noisy are portable air conditioners?
How noisy are portable air conditioners?
Most portable air conditioners on the market range between about 58 db and 68 db. For most people that’s too loud for a bedroom. Above 60 dB a conversation in the room may be difficult to listen to.
A few portable air conditioners are quieter, around 52 dB. Almost always, the machine noise has been reduced by using heavier components, so these machines typically weigh 70 – 80 lbs, 32-34 kg. That makes them anything but portable.
Even then, most people find it harder to sleep with sound in the bedroom above 50 dB.
The quiet portable air conditioner
One notable exception is Coolzy, a tiny portable air conditioner invented in Australia. Used correctly in a bedroom, the perceived noise is about 46 dB on its low fan speed which makes it ideal for sleeping. There’s enough background noise for people who cannot sleep in silence, and not enough to disturb most other people.
Unlike most air conditioners, Coolzy is designed to be used with open windows to ensure fresh air circulates for better health and less risk of infection. Therefore, some background noise is important so that noises from outside don’t disturb sleep.
Can an air conditioner be too quiet?
The designers of evening breeze told us that their earliest model was too quiet. Unlike Coolzy, their machine is a fixed installation in a bedroom. It is not portable at all. Like Coolzy, it’s a low-power localised air conditioner designed to be used with windows open. The first prototype produced around 30 dB of noise, a very quiet humming noise. Unfortunately, even faint noises from outside like owls hooting would disturb sleepers, so they had to increase the noise level!
How much noise is OK for daytime?
Would an old-style portable aircon be OK for daytime use, even with a noise level around 60dB? Authoritative sources such as noiseawareness.com tell us that noise levels well below limits that cause harm can still affect health and well-being. Noise contributes to stress and impaired cognitive performance. Therefore, a sensible option is to choose the quietest portable air conditioner that you can afford, not only the purchase price, but also the long term running cost.
Coolzy comes out way in front on both noise and total ownership cost.
How is the Coolzy-Pro so quiet?
The Coolzy-Pro has a few advantages that work in it’s favour when comparing it’s sound to others. Firstly, we only use the BEST internal components. While some factories use cheaper compressors, we only use the best Reechi or Panasonic inverters (depending on model). These compressors are class leading, have the best lubrication and use the best bearings available. Secondly, a Coolzy-Pro is a low power device which means it isn’t drawing massive amounts of energy to drive large components. The result is less wasted energy on creating internal mechanical inertia with sound as a by-product. Thirdly and perhaps most importantly, we worked with jet fighter aeronautical engineers to design our internal fan impellor. We focused on air volume and turbulence which means our units get the most air per revelation and waste very little energy on turbulence. The result is a lovely smooth and quiet fan speed.
Try a Coolzy Today!
Coolzy is a small, lightweight portable air conditioner designed to be used anywhere you need cooling. Coolzy is just like a tiny refrigerator with a fan that blows cool air directly where needed. Get in touch with us if you have any questions about if Coolzy is right for you. Terms and Conditions apply.
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