How can the aircon be at the same temperature for both heating/cooling modes and feel different?
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When heating or cooling the set temperature is the one the unit is aiming to hit.
If you are trying to warm a room to a set temperature, you could just blow out air at the desired temperature and slowly warm the room, but it will be quicker and more efficient to blow out air at a much warmer temperature – as this spreads out and mixes with the ambient air the heat will distribute out (so the whole room doesn’t suddenly hit the temperature of air the unit is outputting, it will gradually increase), and then as the room approaches the target temperature the unit can reduce its output.
The same happens in cooling – the unit will output air at a far lower temperature than the desired target to more quickly reach the final temperature, then throttle back to a setting that can maintain that.
The end result is that if you are sitting directly under the unit, you get blasted with hot and cold, but for those outwith the blast zone they will experience a quicker acting and more efficient unit.
When heating or cooling the set temperature is the one the unit is aiming to hit.
If you are trying to warm a room to a set temperature, you could just blow out air at the desired temperature and slowly warm the room, but it will be quicker and more efficient to blow out air at a much warmer temperature – as this spreads out and mixes with the ambient air the heat will distribute out (so the whole room doesn’t suddenly hit the temperature of air the unit is outputting, it will gradually increase), and then as the room approaches the target temperature the unit can reduce its output.
The same happens in cooling – the unit will output air at a far lower temperature than the desired target to more quickly reach the final temperature, then throttle back to a setting that can maintain that.
The end result is that if you are sitting directly under the unit, you get blasted with hot and cold, but for those outwith the blast zone they will experience a quicker acting and more efficient unit.
Air conditioning (cooling) also dehumidifies the air.
Heating systems don’t have much of an impact on humidity as far as I’m aware, other than that hot air can hold more moisture than cold air.
It’s also possible that the outside environment is impacting your perception of temperature. If it’s cold outside, room temperature feels warm. If it’s hot outside, room temperature feels cool.
Air conditioning (cooling) also dehumidifies the air.
Heating systems don’t have much of an impact on humidity as far as I’m aware, other than that hot air can hold more moisture than cold air.
It’s also possible that the outside environment is impacting your perception of temperature. If it’s cold outside, room temperature feels warm. If it’s hot outside, room temperature feels cool.
I’ve always found that it has to do more with what my feet are feeling.
In the winter, my thermostat at shoulder height registers 67F, but the floor is at 64F. My feet feel this and don’t feel warm.
In the summer, the thermostat is also measured at a certain point on an inner wall, but heat is leaking in through the outer walls where it feels warmer. Also humidity is higher in summer, so the same 67F feels warmer even though it is the same temp.
I’ve always found that it has to do more with what my feet are feeling.
In the winter, my thermostat at shoulder height registers 67F, but the floor is at 64F. My feet feel this and don’t feel warm.
In the summer, the thermostat is also measured at a certain point on an inner wall, but heat is leaking in through the outer walls where it feels warmer. Also humidity is higher in summer, so the same 67F feels warmer even though it is the same temp.
Air conditioners evaporate the air which makes the air dry relative to the humidity of the air that’s making the humidity, this evaporated air hits the sweat on your body which causes the sweat to evaporate, which is fundamental to the cooling system of a body. Heat is warm air added to the space that does not go through an evaporation process, and you aren’t sweating when your cold, so that cooling system of the body is not being triggered.
Air conditioners evaporate the air which makes the air dry relative to the humidity of the air that’s making the humidity, this evaporated air hits the sweat on your body which causes the sweat to evaporate, which is fundamental to the cooling system of a body. Heat is warm air added to the space that does not go through an evaporation process, and you aren’t sweating when your cold, so that cooling system of the body is not being triggered.
Because the A/C doesn’t heat or cool to exact temperatures. Let’s say you have your A/C set to 72f cool. It will actually cool your house to 70f and wait for it to warm up to 74f before it comes on again. In order to get your house to 70f it will actually blow air cooler than 70f into your house. It will be blowing air around 52f until the average temperature at your thermostat reacher 70f.
For heating the air temp at the vent depends on what kind of system you have. A heat pump will be around 90f-100f and a furnace may be as warm as 120f. If your A/C is set to heat it will bring the average temperature up to about 74f and wait for it to drop to 70f before it comes back on.
The actual temperature it turns on/ff at will depend on the manufacturer of your thermostat and how much control you have over the settings. My thermostat in my house is programmable so I can adjust those settings and even turn just the fan on to get the air circulating.
Because the A/C doesn’t heat or cool to exact temperatures. Let’s say you have your A/C set to 72f cool. It will actually cool your house to 70f and wait for it to warm up to 74f before it comes on again. In order to get your house to 70f it will actually blow air cooler than 70f into your house. It will be blowing air around 52f until the average temperature at your thermostat reacher 70f.
For heating the air temp at the vent depends on what kind of system you have. A heat pump will be around 90f-100f and a furnace may be as warm as 120f. If your A/C is set to heat it will bring the average temperature up to about 74f and wait for it to drop to 70f before it comes back on.
The actual temperature it turns on/ff at will depend on the manufacturer of your thermostat and how much control you have over the settings. My thermostat in my house is programmable so I can adjust those settings and even turn just the fan on to get the air circulating.
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