'The Best N Top.com' content is reader-supported. "As an Amazon Associate, When you buy through links on our site, we may earn an affiliate commission." Learn more.
The main mission of 'The Best N Top.com' is to empower all people on the planet to learn to do anything. We want to help people learn, first and foremost about Best Product Reviews, and Buying Advice. We review the best tech, appliances, gear, and more and other values guide how we pursue that mission. Sharing Knowledge.
We use air
conditioning in summer and winter. As a layman, for the purchase of air
conditioning, some professional terms many people do not understand. What is
the main purpose of buying an air conditioner?
What to look for when buying an air conditioner? What should I pay attention to?
Have some air conditioning purchase common sense, and let you become a smart
Usually, we buy air conditioners mainly based on the parameters
of the air conditioner.
look at the energy efficiency ratio
efficiency ratio (EER) of air conditioning reflects the cooling (heating)
capacity converted from unit input power in the process of air conditioning
The greater the EER of air conditioning is, the more electrical energy
can be saved when the cooling capacity is equal, and the higher the energy
efficiency ratio of air conditioning, the more power saved.
At present, the
air conditioners sold in the market adopt the new national energy efficiency
standard, among which the air conditioner with grade 1 energy efficiency is the
most energy-saving, the air conditioner with grade 2 energy efficiency grade is
next, and the air conditioner with grade 3 energy efficiency grade is
relatively low in energy conservation.
The most important thing to buying an air conditioner is to look at the brand. Choosing the right brand will reduce any worries. The air conditioner quality of famous
brands is guaranteed, and the after-sales system is relatively perfect.
present, the world-famous brands are the Mitsubishi Heavy Industry of Japan and LG
of South Korea; domestic brands Midea, Gree, and Haier also have a place in the
the cooling capacity
capacity is one of the parameters that must be considered when purchasing an air
conditioner. If the refrigeration capacity is too large, the effect is good,
but if the price of the machine is high, the cooling capacity is too small, and
the cost of purchasing the machine is low, the effect may be much worse.
general, the cooling capacity per square meter of the ordinary family room is
115-145w, and that of the living room and dining room is 145-175w.
living room or master bedroom with an area of about 20 square meters can choose
an air conditioner with a cooling capacity of about 3500W, while other bedrooms with an area of about 10 square meters can choose an air conditioner with a cooling capacity of about 2000W.
Users can calculate according to the area of
their own house and choose the most suitable air conditioner for them.
conversion or fixed frequency
conversion air conditioning has advantages in the use of comfort, energy
saving, operation noise, and other aspects. From the current market situation,
frequency conversion air conditioning is the mainstream air conditioning
For the specific difference between frequency conversion air
conditioning and fixed frequency air conditioning, please refer to the article
"comprehensive comparison of frequency conversion air conditioning and
fixed frequency air conditioning".
cooler or heater
conditioners are both cold and warm, and the model labels are KFR and kfrd. If
there is special heating equipment in winter and you don't need to use air
conditioning for heating, you can buy a single chiller. There is no r in the
model label, so the price is much cheaper.
buy air conditioning grades
split type constant speed air conditioner with rated cooling capacity less
than or equal to 4500W as an example, the energy efficiency limit value has
been increased from the original energy efficiency ratio of 2.60 to the current
3.20, and the index of other types of air conditioners has also been increased
The energy efficiency limit value is actually the minimum energy-saving standard for air conditioning on the market, and air conditioners lower
than this energy efficiency ratio cannot be sold on the market.
In the old
five energy efficiency grades, only air conditioners with energy efficiency
grades 1 and 2 can be regarded as energy-saving products and can enjoy national
So, after the implementation of the new national
energy efficiency level 3, how many levels of air conditioning can be
considered energy-saving products? Experts say that in terms of level, it is
still level 1 and level 2, but the energy efficiency standards of the two
"level 1 and level 2" are completely different.
Take the split a constant-speed air conditioner with a rated cooling capacity less than or equal
to 4500W as an example. The energy efficiency ratio requirement of the old
level 2 is 3.20, which is equivalent to the requirement of the new level 3.
energy efficiency ratio requirement of the old level 1 is 3.40, which is only
equivalent to the new level 2, which is the energy-saving evaluation value of
the new national standard, while the energy efficiency ratio requirement of the
new level 1 is increased from the old 3.40 to 3.60.
remind consumers when purchasing air conditioners, they should first look at
the energy efficiency level. At present, the fixed-speed air conditioners sold
in the market must adopt the new national energy efficiency standard, that is,
the energy efficiency grade is divided into three levels, of which grade 1 and
level 2 are energy-saving products, and they can also enjoy energy-saving
The energy-saving effect of grade 1 products is the best. Experts
also pointed out that due to the implementation of the new national standard
soon, it is not ruled out that there are bad manufacturers or sellers who
continue to sell the inventory marked with the old energy efficiency level,
especially in small home appliance stores or rural markets.
pay more attention to it. If they see grade 5 constant speed air conditioners
with grade 3, 4, and 5, they are not recommended to buy, because The energy-saving effect of these products does not meet the requirements of the
new national standard and are eliminated High energy consumption products.
Remember three principles before purchasing.
of the difference in room state and regional climate, as well as the plan for
extreme weather, you should buy a large air conditioner instead of a small one.
the heating effect of air conditioning is lower than that of refrigeration, and
the applicable area in winter is less than that in summer. When you buy an air
conditioner, you should take the heating index as the criterion, so you should
choose the air conditioner according to the applicable area in winter.
if the purchase of single cooling air conditioning, it should be based on the applicable area in summer.
3. When you
buy an air conditioner, you should know the energy efficiency ratio of the air
conditioner, and the energy efficiency ratio of the air conditioner = the
cooling capacity × the cooling power.
Therefore, the air conditioner with the same number of units should choose the one with high EER and the one with low
specific energy efficiency.
for purchasing air conditioner:
conditioning is the most power-consuming household appliance. It is necessary to
avoid the misunderstanding of buying cheap with less money.
However, many cheap
air conditioners will make their actual expenses much more after they are used.
However, if they spend more money on electricity-saving, they may save much
more electricity in the future than when they buy.
2. In the USA,
there are many well-known brands of household appliances, and the quality is
very good. If you query a lot of knowledge on the Internet or netizens, you
will get many different answers. On the contrary, you have no idea what to buy.
pay attention to when buying an air conditioner
buy an air conditioner, you should choose according to the location of your own
floor. It depends on whether you are on the top floor. If you are on the top
floor, it is easy to absorb sunlight in summer. If you choose the air
conditioner on the top floor, you should choose a larger one based on the
buy an air conditioner, you should also look at the layout of the room. You
should see whether the windows are directly exposed to solar energy in the
afternoon and whether there are many indoor corners. If it is very sunny in
the West and there are too many corners, you should also choose a larger one.
choosing an air conditioner, we should also consider the number of people in
the family, whether there are more children or more elderly people. This is
mainly based on the flow of people in the family. The large flow of people
needs to be taken into account in the refrigeration and heating of large air
should I pay attention to when I buy an air conditioner?
To know The quality of an air conditioner depends mainly on the material it uses. In
general, the appearance of many air conditioners is very beautiful. In addition
to a good finish and easy cleaning, the panel of the air conditioner also needs to be
scratch-resistant, friction resistant, and nonyellowing.
In the interior of the
air conditioner, the fins between the evaporator and condenser need to be
arranged in order.
The quality of the air-conditioning compressors directly
determines the use efficiency of air-conditioning. If the quality of the air-conditioning compressor is good, the noise of air-conditioning will be
smaller, and the speed of fan operation will be more distinct.
It can improve the efficiency of air-conditioning refrigeration and heating, but also save more
electricity and energy.
many kinds of air conditioners. Before buying air conditioners, we need to find
out which kind of air conditioners we want to buy and which type of air
conditioning products are more suitable for family use. Split air conditioning
is a kind of air conditioning product that many consumers will buy now.
The wall-mounted air conditioner in split air conditioning has a beautiful
appearance, low noise, and a much lower price than the cabinet air conditioner or
central air conditioner. Therefore, it is an important choice for many families
to choose from, but the split air conditioner is relatively complicated in the
In addition, to split air conditioning, there is window
air conditioning. Window air conditioning is relatively simple to install. At
the same time, its volume is small and its price is lower.
However, in the
process of operation, the noise is relatively large. At the same time, it is
installed in windows and other places, which affects the light and is not
of air conditioning cooling capacity is the choice of air conditioning units.
In general, when purchasing air conditioners, we should choose the number of
air conditioning units according to the size of the room, the sealing
condition, the number of floors of family members, the length of time of
receiving sunlight, and so on.
These factors will affect our purchase of air
conditioning units. When calculating the cooling capacity of air conditioning,
it should be calculated as 150-200w per square meter.
The basic knowledge of air
conditioning, and then locating their own needs
air conditioners do you need?
"number of units" of air conditioning refers to the power of the air
conditioner (horsepower). However, manufacturers usually link the number of
units with cooling power.
1p corresponds to 2500W. Among them, 25 is XX in
KFR xxgw. This is why one small (usually 23) and one larger (26) appear. How
much cooling capacity is needed? Usually, the number of square meters * 2 in a
room can be compared with the cooling power.
For example, 10 square meters * 2
= 20, one piece or even one small piece can meet the demand, while 15 square
meters * 2 = 30, it needs about 1.5 pieces (3500). If it is a penthouse or a
room facing north, it needs to be larger than the calculation. Of course, in
principle, it must be bought larger than small.
energy efficiency ratio pursued to save electricity?
all, if we only look at energy efficiency, under normal circumstances, the
electricity saved by high energy efficiency cannot match the extra cost of
purchase (we will not give you the data calculation here).
However, the energy
efficiency is higher than the model positioning, and the use of materials in
all aspects will be better, which will bring about a better user experience in
addition to power saving.
Therefore, the energy efficiency ratio is not only
about products, It's just about saving electricity.
frequency or variable frequency
there is no big difference in power consumption between different grades of
energy efficiency, the impact of constant frequency and frequency conversion on
power consumption is smaller.
In other words, frequency conversion or constant
frequency has little impact on power consumption except for large-scale
commercial use. Why do we recommend frequency conversion?
In fact, the principle is very simple. A frequency conversion compressor can control the cooling
capacity and reduce the power when the indoor temperature drops, when the temperature rises, increase the power to make the indoor temperature more
stable, while the fixed frequency compressor only has two states of
refrigeration and non-refrigeration and the indoor temperature fluctuates
Therefore, the influence of frequency conversion is more on comfort than on the power saving that is often advertised in the stores. Of
course, there is a saying that frequency conversion is more likely to be
damaged than fixed frequency. The more parts indeed are, the easier it
will be damaged. However, the impact is not so obvious.
Is an electronic expansion valve so important?
For the outdoor unit of the air conditioner, the expansion valve is divided into the thermal expansion valve (capillary) and the electronic expansion valve. The traditional
thermal expansion valve can only be opened and closed passively according to
whether the evaporation pressure reaches the preset value, while the electronic
expansion valve can be actively controlled by the system.
the evaporator, the electronic expansion valve also has more control functions.
Therefore, compared with the traditional thermal expansion valve, the
electronic expansion valve can be actively controlled and can control more, so
the efficiency is naturally better, which is why the electronic expansion valve
is an important part of the intelligent refrigeration system.
conditioners are worth buying?
introduction of the purchase is the need to pay attention to a few issues, we
have a simple positioning for what kind of air conditioning you need.
will recommend some air conditioning products that are worth starting with
the order from low to high.
you mean by 1hp, 1.5hp, and 2hp air conditioning power standards?
is the unit of power and refers to the input power. 1 HP = 0.735kw (kw) = 735w.
definition of "1p (P)" of an air conditioner is to estimate the cooling capacity of an air conditioner according to the 735w electric power consumed by the air
The cooling capacity of an air conditioner with an input power of
1p is about 2000 kcal, which should be multiplied by 1.162 when converted into
SI units. Therefore, the refrigerating capacity of 1p should be 2324w, where w
(W) is the refrigerating capacity.
In general, it is customary to use cooling the capacity of 2500 w with a power consumption of 700-800 W; for a 1.5 HP, it
should be 2000 kcal × 1.5 × 1.162 = 3486w; generally, 1.5pp is equivalent to
3500W of cooling capacity and the power consumption is 1000-1100w, and so on.
this situation, we can roughly judge the number and cooling capacity of the air
The cooling capacity of the air conditioner of one machine is
about 2500 W. generally speaking, the cooling capacity of 2000 w-2700 w can be
collectively referred to as 1 piece, that of 2000-2300w can be called a small
one, that of 2300-2500w is called a piece of the larger one, that of 3200w-3600w
can be called 1.5 pieces; that of 4500w-5100w can be called two pieces.
Main considerations for purchasing air conditioner:
number in the air conditioner model generally represents one percent of the
output power of the air conditioner. That is, the number multiplied by 100 is
the output power (W).
2. From the
interests of the country and the people, try to buy variable frequency air
general, the refrigeration/heating capacity of variable frequency air
conditioning can be 20% - 30% smaller than that of fixed frequency air
Because it does not work in the maximum cooling state for a long
time, it cannot be calculated by the maximum cooling capacity. Generally, the
frequency conversion air conditioner can be selected with a cooling capacity
of 145w-175w per square meter.
4. The air
conditioner with appropriate capacity should be selected according to the
factors such as room size, orientation, floor height, room thermal insulation,
and the number of residents.
The power of the air conditioner should be increased
appropriately in rooms with a bad thermal environment such as those with
shady and poor ventilation, rooms facing north, and rooms on the top floor.
5. The heating load of air conditioning is different from that of heating. Therefore,
if the air conditioner with a small capacity can meet the cooling requirements in
summer, the heating effect in winter may not be ideal, especially in freezing
weather, the heating effect will be greatly reduced.
Pay attention to choosing
an air conditioner with a heating capacity greater than the cooling capacity to
ensure the heating effect. Especially for consumers who have a higher comfort requirement for winter heating, they should enlarge a little margin properly
or choose the air conditioning products with an auxiliary electric heater.
speaking, power should be large rather than small.
7. If the room has good thermal insulation performance, the applicable area can be raised
by 1-3 m2. If it is equipped with an auxiliary electric heating function, the applicable area can be raised by 2-5 m2.
8. In addition to special environmental occasions, generally speaking, the room with
an area of about 10 square meters can meet the demand by purchasing a wall-mounted air conditioner with a power of 1 horse.
For a room with an area of
about 15 square meters, you can choose a wall-mounted air conditioner with a
power of 1.5 or 2 horsepower or a floor-type air conditioner with a power of 2
horsepower for a room with an area of about 20 square meters.
A floor-type air
conditioner with corresponding power can be purchased according to the actual
room size of more than 20 square meters.
Air conditioning purchase guide
avoid conceptual confusion and pursue fashion blindly
conditioning market new products emerge repeatedly, photocatalysts, cold
catalysts, oxygen bars, anions, and nano concepts of healthy air conditioning. It is
understood that, except for lightwave air conditioning, all "healthy air
conditioning" has not passed the inspection of national authority, and
there is no lack of moisture in various concepts and functions publicized by
Consumers should consider the performance-price ratio of the
products comprehensively when choosing and purchasing. They should not blindly
pursue fashion and spend money to buy back a lot of "fancy"
avoid peak buying
conditioning consumption peaks mainly concentrated in July and August, during
which businesses are often in a negative working state. Compared with the
vigorous sales volume, the transportation vehicles, and installation personnel
are far from satisfied, which easily leads to untimely installation and after-sales service. It is suggested that consumers try to avoid the peak period
of purchase and prepare early.
look at three key performance indicators
It is an important basis for consumers to choose air conditioner
products. If the cooling capacity is too small, it can not achieve the expected
cooling effect; if the cooling capacity is too large, it will cause a waste of
resources. According to the national standard, the measured value of
refrigerating capacity should not be less than 95% of the rated value.
This refers to the ratio of cooling capacity and effective input
power of the air conditioner during refrigeration operation. The value reflects the energy-saving situation of air conditioner products.
The larger the energy efficiency ratio, the smaller the power consumption and the less power
noise generated by air conditioning operation. If the noise is too high, it
will seriously affect the lives of consumers.
verification of certification marks
there are two mandatory certification marks for air-conditioning products: one
is the "3C mark", which is issued by the national certification and
accreditation supervision and Administration Commission; the other is the "energy efficiency mark", which contains five levels of energy the efficiency ratio, the highest level is the first level, and the fifth level is
When choosing an air conditioner, consumers should pay attention to
these two signs, and not be dominated by other certifications.
installation according to specifications
The installation of air conditioning has corresponding technical specifications.
Consumers must not choose the installation position or replace the attached
accessories for the pursuit of environmental beautification.
installation, check whether the power supply, voltage, and leakage protector of
your home can meet the requirements, and try to avoid the places where
flammable gas leakage, artificial strong current, and the magnetic field directly
After installation, check carefully. Finally, the test run is carried out
according to the requirements of the operation manual.
With the above purchase notes and instructions, I believe that you can also have A good idea and choose the best. It's too early to think that you can easily and
happily complete a good shopping experience.
For large appliances like air
conditioning, to have a perfect shopping experience, it is necessary to buy air
conditioning after the golden rule.
Golden rule after buying an air
Take a look
delivering the goods to the door, we first check that the outer packing is
intact. After that, the installation workers will open the carton, take out the
air conditioner, and install the copper pipe.
At this time, we should pay
attention to whether the surface of the air conditioning panel is smooth as
new, without scratches, and whether the air guide page of the air conditioner outlet is complete.
If there are obvious scratches or other problems, please
inform the installation personnel in time Specific coordination should be
carried out to prevent the denial of the manufacturer after the event.
piece of the wall of your home is suitable for hanging the air conditioners. If it's not
a load-bearing wall, after some time after installing the air
conditioner, users will find that there are small fine lines on the wall, which
may not affect the use of anything.
However, there is a crack in the house,
which makes it uncomfortable to see in the heart. Of course, the most important
thing is to consider safety.
After the air conditioner is installed, the biggest problem is debugging to see whether
the air conditioner operates normally. In winter, it is generally to check to heat, and in summer it is refrigeration. Some friends will ask, is it not
possible for me to heat up in summer?
The answer is: Yes. But the specific air
conditioning or to determine the actual situation, which needs to ask the
installation personnel of each brand. After the installation is completed, turn
on the air conditioner, stretch your hand to the air outlet or stand under the
air conditioner to feel the air outlet of the air conditioner.
for some time, obvious cool wind or hot air is blowing out all the
time, which indicates that the overall operation of the air conditioner is
At this time, check whether the noise value of the air
conditioner is within the normal range of use and whether there is no excessive noise
or abnormal sound when opening.