Tabtight professional, free when you need it, VPN service. Looking for a great deal on dog supplies Weve found the best deals dog supplies from around the web. Roof Ventilation and Power Savings Note I am going to guess you have, electronics experience as you have monitored all your own temps. So you know what an RC circuit is and how it charges and discharges. If you have done yr. When the bucket is full the bucket leaks faster. You can tell because the water squirts out further. You can make the bucket empty slower, by having a bigger bucket or a smaller hole. Your house temps work equilibrate exactly the same as whichever one of those floats your boat. Your house is like several leaky buckets inside one another. Red Alert 2 Rip Portable Washing' title='Red Alert 2 Rip Portable Washing' />So try not to get confused when I change what the bucket and where the leak is. Torrent Esprits Criminels Saison 9 here. Heat leaks in through the walls to your house, during the day. Red Alert 2 Rip Portable Washing' title='Red Alert 2 Rip Portable Washing' />After you turn the aircon off heat leaks out of solid objects inside your house and heats the inside air back up again. At the same time heat inside is slowly leaking outside That slower leak is visible 1. The faster leak from furniture etal into the air is visible from just after the aircon is turned off. Look at the inside temp graph AFTER you turn off the air con. It rises up in a classic exponential approach. Eventually if it stayed night and 2. YR.png' alt='Red Alert 2 Rip Portable Washing' title='Red Alert 2 Rip Portable Washing' />Federal Human Resources Office J1Manpower Personnel The Federal Human Resources Office J1Manpower Personnel Directorate provides personnel support services. No matter how you slice it, keeping some extra battery power on your person can do wonders to affect how you move through the world. If youd like to take some. Where is the heat energy coming from As your outside temp is lower than inside, I can promise it did not come from there. I am betting it came from all the other mass inside your house that is not air. The aircon true to its name cooled the air inside your house down. As soon as you turned it off, the furniture, the wall plaster the floor, the slab, the furniture, and everything else just warmed the air up again. You could make that worse by putting a large pile of bricks stacked with air gaps in your lounge room. You could make that worse still by turning on a fan that blew air through the stack of bricks. That would make the temp snap back up to 3. The bricks makes the bucket of solid objects that hold heat larger and the fan makes the hole bigger. An experiment you could try is. Insulate the sensor as well as you possibly can from the room temp. If nothing else a towel folded into a 3. High R. A ball of cotton wall over the sensor itself will have low thermal mass. Your temp sensor ought fairly rapidly equilibrate with the walls internal temp. I am predicting it will go up fast. It may even level out at close to what the room temp will be if you turn the aircon off. On hot day the metal belt buckle in your car and the seat belt are the same usuallyno direct sun on them the same temp, yet the metal feels hot. The human sense of touch heat is largely biased by conductivity of the object touched. You can pick up red hot tiles of the underbelly of a shuttle. You can do the same thing with a stack of bricks, except with those you can get inside the stack in real time. Make a stack cubic ish stack of say 6 or more bricks in your lounge room. Coverseal it with 1 layer of paper. Anyway with the bricks in place, on day like the one you had, and the aircon turned on for few hours poke a thermometer into the stack. It will still be pretty much the same temp your room was before you turned the aricon on. A stack of bricks with one layer of paper is fairly large bucket with very small hole. The plaster in you wall also has layer of paper but is not cubic in shape it will equilibrate a bit quicker. If you turn the aircon off all the heat inside all the other objects in the room will leak back into the room. By extrapolating the curve after midnight back I am guessing the time you had your aircon on cooled the internal temp of physical objects in your room by about 2 degrees. I just had a good look at yesterdays temp readings from my house and roof and things are interesting. They are interesting but I dont see anything that greatly surprises me. Internal roof temp is all over the place. Thats Ok there can be little thermal mass up there. Is your roof ironI think you say it is black concrete tiles but sarked Even so the temp under the sarking can move independently of the tiles. Also it looks like there a was a cool change event and associated cloud cover. The exact timing of when cloud cover shielded a black roof will be more than little significant. Note your roof gets colder than outside at night It does that due to black body radiation. A significant cooling force, eg biggish fan making a breeze and your roof could cool it rapidly. I am a little puzzled by what happened between 1 3. The roof temp plunged. As the outside temp decreases then falls of a cliff I would suggest a cool change came through. Its been more than decade since I lived in house like that, but I remember houses doing that. In terms of efficiency you ought find out why turning on you air con cooled the roof space. Possible causes are the aircon leaks cold air the aircon draws its air to be cooled from the roof space. I am guessing no one was home because the internal temp was left at 3. Note how the aircons cooling curve is also beautifully bent. Its a leaky bucket curve too. You say some things that are huh This isnt coming from the roof as the temp is lower and falling and it isnt coming from the ambient outside as it is falling too. I am sorry but while the conclusion is correct the reason cant be let stand as it will only mess you up to believe that, the direction of its change is irrelevant. The heat is coming from somewhere anywhere that is hotter than the rooms current air temp. You suggest. I am tipping that this is coming from the bricks of the house as that room that I am monitoring is on the western side of the house, so the bricks will heat up in the afternoon. And thats a good thought. However as your room temp has been 3. And the thermal mass of all the stuff inside your house is not insignificant, and the aircon only cooled it for a few hours, so i think it very likely most of your overnight problem is not an external brick wall but the inside temp of objects. The good news about that is, imagine if you had system that pumped lots of new air from outside into your house at night. If after sunset your indie temp had closely tracked outside, then any time you turned that breeze off your house would still warm back up again, but by morning all the internal heat stores plaster furniture etc, would be pretty close to outside. See the long slow cooling curve, 1. Then the thermal mass in physical objects inside the house will heat up that slowly in the day time. Then your house will cool down much quicker and much cheaper. Caveat Actually I am confused your data tells me your house is 3. Your data tells me you ran the aircon to cool your house when it was at all times cooler outside than in. I find that confusing as I never run an aircon when its cooler out than in. In my house thats what fans and windows are for. This makes me thinks I misunderstand something. For reference on a similar day my house will never have been more than a little hotter than outside, as I will have had the windows open and all windows shaded. I will suggest a practical chea p thing to try to make your house much cooler on days like that.