Frequently asked Questions

See a list below of Frequently Asked Questions. If your problem is not answered on this page, please call us at +62 811 9189 727. Our office hours are between 9am and 5pm .


What is Close Comfort?

Close Comfort is the name we chose for our unique air conditioning technology.It is the name for our company founded by the inventor, James Trevelyan, in 2007.

Where is the company located?

Our head office is located in Singapore with regional offices in Australia, Pakistan and Indonesia.

Who is the inventor of the Close Comfort Personal Air Conditioner?

The Close Comfort Personal Air Conditioner was invented by James Trevelyan. James is the CEO of Close Comfort and a Professor of Engineering at The University of Western Australia. He’s past experiences includes leading Australian teams who invented sheep shearing robots and robots that can be remotely controlled via the internet as well as research into landmine clearance methods.


PRODUCT How many BTUs cooling capcity?

About 2500-3500 BTUs per hour, depending on temperature: that is about 1/4 ton of refrigeration capacity.

What do I get when I purchase Close Comfort?

Close Comfort comes with the personal air conditioning unit and a power cord, instruction manual and in some centres is also supplied with the optional bed tent in a single package.

Can I leave the windows open?

Yes, absolutely.It’s best to keep windows closed and curtains drawn in the hottest part of the day, but at other times, Close Comfort works best with open windows and fresh outside air.

How close or far do I need to sit from the unit?

Close Comfort uses Smart Air Flow Technology to create a steady stream of cool air that is effective up to 150 – 250cm from the cold air outlet.

How do you switch the unit on?

The product automatically switches on when both the flaps at the top of the unit are opened.

How large a space can Close Comfort keep cool?

Close Comfort does not cool a whole room; it cools a person by directing cool air just at the person instead of wasting energy keeping the whole room cool.

What is the temperature of the air?

The temperature of the air created by Close Comfort will be comfortably cooler than the temperature of the surrounding air; the temperature automatically varies with local conditions.

How do I use it at night for sleeping?

Close Comfort can be arranged to blow cold air over your bed and it can keep two people cool at night.In very hot climates (more than 30°C at night) we recommend using it with a patented Close Comfort tent which also provides 100% protection from mosquitoes and other biting insects.

Can I adjust the temperature of the air produced?

The thermostat in the PC9+plus model allows you to regulate air temperature. However the thermostat is most
effective when using Close Comfort with a tent.

Does humidity affect the cooling?

Close Comfort works harder in humid conditions to keep you feeling cool.

Does extreme heat affect the cooling?

Close Comfort is made to provide relief from the heat, so it can be used in any indoor climate up to 44°C. In extreme conditions we recommend you use a patented Close Comfort bed tent.Like any machinery, to avoid overheating, it is advised that the unit be kept out of direct sunlight.

Can I leave the unit running for long periods of time?

Depending on the heat and ventilation, Close Comfort can run 24 hours a day without any problems.Make sure you check the air filters from time to time and clean them when needed.

Does Close Comfort require any consumables to operate?

Close Comfort does not require any water, gas, batteries or ice to operate. It operates solely on electricity

Does Close Comfort require any special adapters or power outlets?

The unit can be plugged into any standard power outlet.

Does Close Comfort generate any exhaust or water that need pipes connected?

Close Comfort requires no ducting, plumbing or piping of any kind. Water condensed from humid air is re-evaporated, but up to 2 litres of distilled water can be collected if you need it to top up your batteries or for ironing clothes.The water is not suitable for drinking.

How heavy is the Close Comfort unit?

Close Comfort weighs just 17 kg and is easy to carry. It comes with castor wheels for easy movement and positioning

How large is the unit?

The entire unit is 28cm x 39cm x 55cm high, making it compact and easy to move, position and store in any environment.

Can Close Comfort be used outside?

Yes! In sheltered places, Close Comfort works very wel.

Do I still need to use conventional air conditioning with Close Comfort?

No. Close Comfort produces enough cool air to keep one or two people at the same location cool and comfortable through the day and night. If you need to cool the entire room for a special occasion or meeting, then you should use a conventional air conditioner just for that time. You can use conventional air conditioning with a higher thermostat setting to obtain better economy, say 28-30°C. Then use Close Comfort where you need a little extra cooling.

Where does the hot air go?

Unlike conventional air conditioners that throw out huge amounts of hot and humid air, Close Comfort exhausts a gentle stream of warm air up to the ceiling where the heat dissipates without warming the room perceptibly.

About AC

How Close Comfort protects you from huge electricity bills?

All normal air conditioners (and air coolers) aim to cool the entire room by mixing the cool air with a strong fan. In cases where walls are not insulated, the heat passes through easily and the inside surface of the wall heats the air in the room. Most of the electricity used by a normal AC is used to cool the walls, which is impossible and walls don’t complain about being hot, only people complain. Close Comfort keeps cool air away from the walls and focused only on you, so you receive enough cooling comfort with 15-20% of the electricity needed for a normal AC (Window, Split, Inverter, Portable).

Why doesn’t Close Comfort have a stronger throw of cold air like other ACs?

An AC with a strong blast of cold air feels great in the shop, but wastes your
money because most of the cold air runs up against the hot walls.
The whole idea of this AC is to just cool you and your friends or family, not the
walls, floor and furniture. With more cool air, you will be no more comfortable,
but your monthly electricity bill will be much higher.

Where does the hot air go? Is it better with exhaust pipe?

Surely the room gets hotter if the hot air comes out inside the room. Isn’t it better to send it outside with a pipe?
Close Comfort uses so little power that the air coming out is warm, not hot. The warm air goes straight to the ceiling and loses its heat through the ceiling.

Try it: climb on a ladder and you just might detect a tiny temperature rise with a sensitive thermometer. A normal portable AC uses at least 4 times as much power so the air coming out of the pipe is hot. But, the air that goes out is replaced with more hot air coming through doors and windows, so the room only gets slightly cooler, and you will still use 200 – 300 Rupees worth of electricity a night, much more if you keep it running with a generator through load shedding.

Are there any health benefits?

Yes, lots.
First, with a UPS you get uninterrupted sleep through load shedding so you wake feeling refreshed and ready to enjoy life. Second the tent keeps out insects at night protecting you from bites, dengue and malaria. Third, with the windows open at night, you sleep in fresh air. With a family all sleeping together in a room with a split AC, the air is never refreshed. Harmful air builds up through the night and everyone shares it. Users have commented to us that with Close Comfort, they don’t experience that nasty itchy eye feeling from normal air conditioners when they wake up. Finally the tent gives you some privacy: you can leave the doors and windows open but people cannot see you inside the tent.

How long does it take to cool the tent?

Only 5-10 minutes. You can pop into bed for a nap during the day whenever you
feel like it.

How much area does it cool?

Close Comfort blows a gentle stream of cool air at people: you need to sit within
4-5 feet of Close Comfort to feel cool. Close Comfort works best with the air flowing around your face and neck.
Close Comfort will keep a family cool sitting together on the couch, watching a movie on TV. If you want to cool a crowd, use a normal AC: that’s what they are designed for.

How does using Close Comfort help the environment?

You use so much less energy, helping to reduce pollution and heat emissions, and
keeping your environment more comfortable and healthy for everyone

Someone told me you can only use it for sleeping. Is that right?

Not at all. We use it every day in summer at work. We set up Close Comfort on a
chair or table to keep our faces cool.

What’s the warranty and where do I get after-sales service?

Warranty 2 years for the compressor, 3 years for the other parts. Call us on +62 214261483 for after-sales service. Initially, we will provide service in Jakarta.

Does it need maintenance?

Just check the filters every 2 weeks or so and clean them using water if needed. We recommend an annual clean by an air conditioning technician in dusty places.

Does it need a special power outlet?

No. The unit can be plugged into any standard power outlet.

Does the water have to be emptied out?

No. However, the water can be collected for use in batteries if needed.

Technology and Power

Can I save energy with a DC Inverter AC?

Yes. Close Comfort’s PC9+plus model uses DC Inverter technology. With a tent, the average power consumption is
reduced to about 170 Watts. Close Comfort always uses much less energy than window, single hose portable or split

How big does the UPS and Battery need to be?

We recommend a 1000 – 1200 Watt sine-wave UPS and two 115 Amphour
capacity deep cycle batteries.

Do I need special batteries?

Deep cycle batteries (such as TAB Tubular Batteries) cost 60-70% more initially
but last for years. Normal car batteries are not designed for use with UPS power
supplies and last only 8-10 months, so they cost 40-50% more per unit of
electricity supplied.

What if load shedding is bad in my area, say 12-18 hours a day?

We recommend you consider a small generator which can run 5-10 Close Comfort
ACs, so you can share power and running costs with your neighbours.

Can Close Comfort run on solar power?

Yes, but you will need a solar system with a 230 Volt inverter. Close Comfort
requires normal AC power. Two panels of 250 Watts each should provide enough
power. Make sure you get your solar dealer to demonstrate it working before
you pay for the installation.

Can I use daytime solar power and store it in batteries for night time use?

Yes, if you have sufficient battery storage. Make sure you ask for a hybrid solar
inverter that provides 230 Volt AC power. The battery storage capacity will
depend on the availability of mains power at night. Plan on at least two 115 Amphours
storage capacity batteries with 50% load shedding. If you want to rely
entirely on solar power, you will need up to four times more battery storage at a
cost of at least Rs 120,000 – 150,000.

What cooling technology does Close Comfort use?

Close Comfort uses conventional compressor refrigeration, just like your
refrigerator or freezer. It has a completely welded refrigeration circuit that will
last as long as your fridge or freezer.

Someone told me you can only use it for sleeping. Is that right?

Not at all. We use it every day in summer at work. We set up Close Comfort on a
chair or table to keep our faces cool. It’s magic: if your face feels cool, your whole
body feels comfortable.

Does Close Comfort use a refrigerant?

Yes. It uses R134a, which is a fluorinated refrigerant gas which is covered by the
Montreal Protocol protecting the ozone layer. R134a does not harm the ozone
layer significantly.

What kind of compressor does Close Comfort use?

Close Comfort uses a simple, quiet, electric reciprocating compressor, just like
your refrigerator or freezer.

What’s the life of this AC?

Depending on its usage, if maintained well, the life of the Close Comfort unit is
equal to or greater than the life of a standard air conditioner. It has no parts
exposed to the outside weather conditions so should last longer.

Does it need spare parts?

No. Close Comfort has nothing that wears out and needs replacing. Spare parts
are available from your supplier if you misplace a filter or another removable
part. Call us for spares.