Then allow the ac unit to run at least 15 minutes.
Ac unit temperature drop attic duct.
Put another into a supply duct as close to the unit as possible.
Instructions input information may generally be be obtained from design documents or field measurements.
Professionals call this temperature.
An outdoor unit which houses the fan condenser and compressor and an indoor unit which holds the evaporator and fan.
The temperature your ac puts out is relative to the temperature you set on your thermostat.
As long as the building has not reached its thermostat s set point.
Going up into an attic and seeing ductwork running every which way is not an uncommon sight.
If you ve studied heat transfer at all you may recall that the rate at which heat moves from a warmer to a cooler body depends on the temperature difference which we abbreviate as δt.
Calculates the temperature change of air flowing in a duct reference.
Most updated central air conditioned homes have a new air conditioner split system meaning the ac is broken up into parts.
To reset the switch you ll need to climb up into.
It also means that the air in those ducts is continually exposed to the ambient temperature in the attic.
So why put an hvac system up in the attic at all.
The system should be blowing air that is noticeably cooler than the building s air.
Put one into a return duct closest to the unit as possible.
So even though there s no single ideal temperature you do want a 16 22 f difference from the supply air and return air.
Attic hvac systems save space.
Summer hasn t even arrived he notes in a post at gba s q a forum and when the temperature outside climbs to more than 95 f the temperature in the attic tops 120 f.
Ted also has inherited a powered attic ventilator.
You should expect a 15 to 20 degree temperature differential from the air temp going in and the air temp coming out after the unit has been running a period of time.
Well there s not a universal fixed temperature your ac should always be blowing.
Place the thermometer on a vent and leave it in.
2009 ashrae hof chapter 4 equation 48 pg 4 21 this calculator estimates the temperature drop or rise of air flowing in a duct.
Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal.
Well mainly it s a way to save space.
I suggest you use 2 accurate thermometers.
That has kept the ventilator working but ted surmises the high temperatures are reducing the efficiency of his air conditioning equipment.
There too unless the supply duct is long uninsulated running in a hot space such as an attic the air temperature at the supply register should be around 55 degrees.
If the temperature in your area rarely gets that hot wait until as hot a day as possible to test.
