Yesterday, a girl from Xiaoshan posted a consultation on the Xiao intranet App:
High-rise residential, water heater with good air or gas? I want to use air energy, but air can take up place, and now it's a bit tangled.

Network diagram: air energy water heater
The opinions of netizens in the comment area are basically divided into two factions.
Netizens who support air energy said that air energy is safe, power-saving, efficient and large. If you live in a high-rise building, there are many people in the family, and air can be a good choice.
Netizens @L.S.M.N: power saving, automatic heat preservation all day long once.
Netizen @ anonymous: Our family of 5 people, air energy. After five people washed, the water was still hot, even if it was used up in winter, the heat was also very fast.
Netizen @ spicy snot bubble: I bought the air energy of the all-in-one machine last year, which is very easy to use.
Netizens @langkediguo: my family of 5 people, with 200L of air energy water heater, regular settings at two o'clock in the afternoon to eighteen o'clock in the evening shutdown temperature set 55 degrees, every day the whole family has to take a bath and some daily water is enough, as for the electricity bill in the winter four hours will all turn on, but after the winter, its practical use can not be burned to 55 degrees in four hours, the power 850w you calculate how much electricity costs a day, I personally think it is quite good.
Netizen @ lonely people: high-rise air can be better, high-rise with gas, winter bath that sour who knows.
Netizen @ small mouth: home is the air energy, have to make room, or very good to use, the capacity is large.
Netizens @A Mitsubishi central air conditioning: the equipment platform is enough, it is recommended to choose air energy.
Some netizens also believe that the air can occupy a large area, the purchase cost is high, and the noise of the external machine is large, so it is better to choose gas.
"Air energy is a pit, surely the gas is good," some netizens said.
Netizen @ Xiaoshan dried radish: Air can save energy and efficiency is not wrong, but the price is several times higher, and it has a large air conditioning external mechanism heat you say that the cost does not cost electricity.
Netizen @ anonymous: the air can be noisy with the tractor outside the machine, be careful to find the door upstairs and downstairs. Of course, the gas is good, the gas is not expensive, you can use it at any time, too convenient.
Netizen @ Requiem: Air energy is a pit, and the gas is definitely good.
Netizen @ Super Saiyan: Is there any device platform to release air energy.
Netizen @ shallow rain ink: gas bar, air energy is too much place.
Netizens @edsf01: the extra money that the air can get enough for your electricity bill, the key air can be far away, and you have to put water with hot water.
Netizen @ Xi Aili: both are installed, it turns out that or gas water heater is good, air energy is after all water storage, so there is a bathtub is definitely not to consider the air energy, and air energy, very occupied, the internal and external machines are very large, energy consumption, air can be heated to use electricity, thermal insulation to use electricity, 24 hours are open there, the province can not go anywhere, and gas is also very cheap.
Source: Xiaoshan Forum