Every summer, there's always a lot of friends in the back office asking the same question: how does air conditioning work
"why is it the same 1. 5, 2,000, and more than 5,000?" "is the new level of energy efficiency really power-efficient?" "is it more expensive to buy less and less cool
Take it easy. This article, which does not refer to complex parameters, does not pile up professional terms, and is based on the idea of cleaning up air conditioning options from the point of view of ordinary homes, home improvement, renting new houses. All you have to do is look at the eight modules one by one, and you can make decisions you don't regret。
I. Addressing the three worst pits first
Most people buy air conditioners and pedals
Wrong number: one in the bedroom, it won't come down in the summer and wake up in the middle of the night;
(a) configuration reduction: the number of brands is the same and the price is a thousand different, and the price is assumed to be a value for money, in fact, a single decompressor plus a catheter;
The price is not price: cheap air conditioning buys home, spends hundreds of dollars a summer on electricity, and three years is more expensive。
This paper is based on the 2026 new state and mainstream brands' open technical information, which will help you to create a zero-base, replicable, and directly replicated selection logic。
Core first step: how do we count? This is the greatest error
The number of purchases is small and the air conditioners work hard to cool down and are extremely expensive for electricity; the number of purchases is large, frequent outbursts, high noise and poor health。
The following table can be saved directly:
Suggested number of rooms
10-15m 21 small bedrooms, study rooms
15-22 m21. 5 most used bedroom specifications
22–32m 22 small living rooms, master bedroom
32–45m 23-seat, open space
Amending the rules (a lot of people ignore):
(a) large ceilings, suns, down windows, high-level glass: 0. 5 more above above, for example, 15 m2 west tan bedrooms, 1. 5 more than 1;
Levels above 2. 8 m: also recommended for promotion;
The dining room is intact: not just the living room, chosen on the basis of the total area。
One sentence concludes: 1. 5 in the ordinary bedroom, 2 in the small living room and 3 in the large living room or restaurant. Don't buy a small number for hundreds of dollars, and you won't get it back。
Iii. Hanging up / cabinet / windpipe / central air conditioner, how to choose?
Type, fit for population, strengths, weaknesses, pit avoidance advice
Bedrooms, study rooms, small household size, easy to repair, common family preference not to exterior surface pipe
The cabinet room, the big space, the wind is far above the ground, and more than 30 m2 is considered
Windpipes seek beauty, local slings hide in the slings, aesthetics install expensives, maintenance troubles don't suggest normal families are hard. Let's go
Central air-conditioning floors, villas, multirooms with a whole-of-the-art look, long-term extra-power start-up, single-cost power
Direct conclusion:
Regular two- and three-space: bedroom hanger + living room cabinet or large hanger, most economical, most practical;
(b) the budget for the renovation is tight and does not want to make a scene: the whole house hangs up/tores, no problem;
Windpipes and central air conditioners are not bad, they're not for most people. Post-repair repairs, cleaning, switching are trouble。
Iv. New national standard energy efficiency + variable frequency frequency, which saves most electricity
First, the flat frequency, vs
In the current 2026, the rfa was almost off limits。
Routine frequency: when the temperature is down, the temperature is down and restarted, cold and hot, noise is high, and electricity is expensive;
Variable frequency: steady operation, low temperature fluctuations, quiet power saving。
Perception: full straight current frequency (all compressor fans are straight current frequency), this is the bottom line。
What about new national standards?
The new national standard apf (energy consumption efficiency throughout the year) increases electricity efficiency. Current market:
A new level (apf ≥5. 0): self-contained, long-term, strongly recommended;
A new level ii (apf 4. 0-5. 0): budgetary constraints may be considered;
New level 3 and following: only for rental, short transition。
Real books: one and a half new level-i energy-efficient air conditioners, with 200-300 degrees of electricity in one summer, saving the difference in three or four years. There's no need to save the money。
By way of example, the apf model of 6. 12 is already well above the new level i standard on the market, which is more than 40 per cent more expensive than the third-level energy efficiency, and is cost-effective for long-term self-employment。
V. Hardware configurations that are only visible in the profession (this is the core of the whole text)
Same brand, same 1. 5, why is 2,200 sold, and 3,800 sold? The answers are all in the three configurations below。
Condensers: double row > 1. 6 row > single row
(b) double-team condensers: the size of the heat area, the speed of cooling, the high temperature not to strike, preferred;
Single or 1. 6 rows: low cost, high temperature easy to reduce, not recommended for home ownership。
What do you think? Asking a customer or a decompressor is usually a single row。
Electronic expansion valves vs hair tube
Electronic expansion valve: precise control of cooler flow, temperature control, power saving, quiet, good configuration;
Shade tube: old technology, low cost, rough temperature control, pit avoidance。
Self-contained selection: double-team condenser + electron expansion valve + full current frequency. These three configurations are met, basically a good air conditioner。
Compressor brand and charge
Under the same number, the larger the charge, the greater the power. For example, 1. 5 compressors were upgraded from 9cc to more than 10cc, with a marked increase in cryogenic heat and high temperature refrigeration capacity. An ordinary user does not need a model to recognize the "large charge plus well-known compressor brand"。
Vi. Functional trade-offs: what really works and what's wrong?
Functional functionality (value for money)
Function value
High temperature above 56 degrees c cleans up. Fees
It's a cold wind. It's a well-designed steering panel. Head
Wet and independent
App + bluetooth intel
We can see how much power is used every day/month
Premia or chicken rib function (selected as needed)
New wind function: unless you can't open a window (under the street, with heavy fog), it's of little use and limited amount of gas;
Voice control: it's okay to play once in a while, and it's not used much;
Dissociation, purification: if you have a family that is sensitive, has a child, has an old age, and real money makes sense, with the ability to purify; normal healthy families are not necessary。
Smart order of spending: power conservation (energy efficiency + hardware) > comfortable (proof blow + silent) > health (cleaning) > smart interconnection > fancy interaction。
How do you choose the brand
First platoon: main national brand (stable, good after sale)
Hail: it's worth saying alone. In recent years, there has been significant investment in energy-saving technologies, such as the real savings apf of the clean-up electricity series to 6. 12, which is the current industrial energy efficiency ceiling level. At the same time, energy-saving technologies such as ai self-learning, cool core bridge high temperature cooling, telekinetic control, etc., are being used for long periods of time. After-sales coverage is wide and cities on the 3rd and 4th line are not afraid。
Beautiful: the product line is rich, technically mature, the valor is priced, and attention is paid to the line-specific configuration。
Glig: the reputation is strong, the material is solid, but the allocation is high and the budget is adequate。
Second platoon: high value versus brand
Mi/m home: smartly econometric, low-priced, suitable for young people, renting, temporary use, but some of the types of off-boards are generally configured, with self-occupied long-term recommendations for specific dismantling machines。
Ox, tcl, ion: cheap, suitable for budget constraints or rental, not recommended。
Third platoon: high end of the japanese system (golden, mitsubishi, fujito)
It's good, but the price doubles. No ordinary family is necessary. Unless the budget is very adequate and there are great demands for silence and comfort。
In one sentence, it is recommended that he choose heil, american, grid and a specific series according to budget and function. The pursuit of extreme power savings can focus on high-apf products such as the net e-finance in haile。
Viii. North-south differences + installation of pits + stupid summary
North-south selection differences
(a) the south (mue rain, return to the south): independent, wet function, priority increase; external, rustproof, corrosive;
North (drying, winter heating needs): thermal capacity depends on the preferred electro-inflation valve, low-temperature heater type;
Nationwide: top floor, west sun, large window areas, plus one。
Installation of 3-part product 7-point list of pits
Copper tubes: a standard range of 3-5 metres, 100-150 yuan per metre in excess, with a good advance distance;
(b) high-altitude operating expenses: around $100 per day for the fourth floor and above;
(a) stands: parts of the brand are not delivered, while outside racks average $80–150;
(b) peaks: usually one to two free, plus extra;
Leather switch: two or more cabinet machines are not normally available, and purchase several dozen of their own, and the installation of the master's belt may be hundreds。
Before the next order, ask the customer for three sentences: "does the bag be installed? How many metres is the copper pipe? What are the extra charges?
Final: a stupid buy list (do it directly)
Bedroom (15-22 m2)
Number of horses: 1. 5
Energy efficiency: a new level (apf ≥5. 0, as high as possible)
Hardware: double-detach condensers + electron expansion valve + full current frequency
Function: high-temperature self-cleaning + direct blowback + app smart control
Brand: hale/american/gree mainstream series
Living room (25–35m2)
Number of horses: 2-3 containers or hangers
Energy efficiency: a new level
Hardware: double row + electron expansion valve
Function: big wind + self-cleaning
Limited budget / rental
An appropriate downgradation to the new level ii and a single line of hardware could be accepted, but the flat-frequency air conditioner was not recommended for purchase。
You do not need to be an air conditioner expert, but just remember: buy small, new level of energy efficiency, double + electrostatic expansion valves, mainstream brands, ask about installation fees. Follow these five and buy air conditioners in 2026。
If the article saves you money, avoids the pit, welcomes the collection and forwards it to friends who are in the process of renovation or preparing to change air conditioning。
