Does a house A/C put out a constant or variable Temp?

I was curious if a house A/C puts out a constant temp or variable temp based on thermostat setting? In other words..is the air pushed out of the vents proportional to the thermostat set temperature?

Does a house A/C put out a constant or variable Temp?
The thermostat only turns the outsided condensor and inside blower motor on. That's all it does. It has no specific or proportional affect on the air temperature going through the coil. That is determined by other factors, one being the inside air temperature of your house. For example, if you turn your air conditioning off when you leave the house and the house gets up to 90 degrees, then when you come home and turn your A/C on, the air coming out of the vents will be warmer than when the house finally gets down to the temperature you have set on the thermostat. Then the thermostat simply turns the system off. The best that an air conditioner can do is lower the air temperature accross the coil about 15 degrees. So, if you have 90 degree air entering the coil, it will come out at 75 degrees. As the temp in the house drops, then the temp coming out of your vents drops, too. As the house cools down, then the temperature coming out of the vents will steadily drop as well. That will keep happening until the thermostat is satisfied and turns the system off. Typically, when a system is running properly and the house A/C is cycling at the desired temperature you have set on your thermostat, the evaporator coil temperature is about 38 to 40 degrees, which will give you a vent temperature of about 55 degrees. Again, the thermostat only turns the system on and off, and nothing else.
Reply:No the temp is constant, the fan speed varies to push out a certain VOLUME of cold air. Also thermostat turns the unit on and off to make regulate teh temp.
Reply:Simple answer, the temperature of the air entering the unit controls the air temperature coming out of the unit.
Reply:The A/C unit produces air at a constant temp (somewhere in the 40s or 50s Fahrenheit). The unit will send air into the room until the thermometer reading is a degree or so below the thermostat setting, then it will shut off. When the temperature rises above a degree or so above the setting, the unit will turn back on.
Reply:variable,,set the temp,,you want
Reply:No, the AC compressor cycles as needed to maintain temp.





It will lower temp to setpoint, or a few degrees cooler, then shut off and kick back in when the setpoint is exceeded by a few degrees.





However, not all AC systems work the same. At the place where I work, the cooler is always working, it brings the air to 55 degrees, and then there are duct heaters that will reheat the air to the desired temp as it enters each space, which the occupant of that space has control over with a thermostat. So turn it off if you like your air at 55 degrees!
Reply:Variable, the drop in temp across the coil should be at least 18 degrees. So if the current inflow of air is 75 then the out is around 57. As the temp of the inflow of air drops so should the outflow. 73 inbound should be 55 out.
Reply:Most a/c will have a 20 degree split from the temp in the house to the air coming out of the first vent in the system. It is not constant. If its 80 degrees inside your home, The a/c will blow out at an average of 60 degree's, It doesn't matter what temp you have the stat set at. If its set at 50 degree's, But still 90 in house, the air isn't going to blow at 50, but instead at around 70, As the house cools down, the cooler it will blow
Reply:The temperature is constant.