Browse Forums Heating, Cooling & Insulation Re: 3 phase or single phase 3Sep 22, 2008 10:29 am simo What is more common for ducted air cond as far as supply voltage.... Depends upon the size of the system you're getting... For instance, the largest Daikin single phase unit is 15.5kW and the largest Actron single phase unit is 18kW... For up here on the beaches this sort of capacity is plenty for most houses; however out West where the average house tends to be larger and the temperatures higher then there's a greater tendency to go for higher capacity units and hence 3 phase systems... Horses for courses... Re: 3 phase or single phase 5Sep 23, 2008 9:37 pm I was given a quote today for 5 zone, 8 outlets 12.5kw and was told single phase would be sufficient. Re: 3 phase or single phase 6Sep 23, 2008 10:19 pm although if they are going to install 3-phase for you its good for the home mechanic for hoists/welding, i heard some random say that a 3-phase system is cheaper to run, i cant see how that could make any difference though. 2nd-Fix | Blog Building with Desyn Homes previously with the insolvent [url=https://www.facebook.com/7NewsAdelaide/videos/1162546323776021/]Endeavour Homes[/url] Re: 3 phase or single phase 7Sep 29, 2008 3:19 pm electricity has never been my 'thing' however a few things I do know:
Either phase will give you the same output. ie a 12kW single or three phase will still do 12kW (perhaps stating the obvious ... sorry) Three phase is cheaper to run. The way I understand this is the start-up required by an a/c unit is quite large. The may draw 30 amps to start then run at 11 for example. On a three phase unit it starts up 10, then 20, then 30 amps, slowly thus cheaper. A single phase would go from 0 to 30 amps in one hit and makes your head spin when you watch your electricity meter. So in short if you can get 3 phase to your home without a huge expense, you'd be better off IMHO Cheers Dynamic Heating & Cooling - http://www.DIYheating.com.au DIY Ducted Heating & Cooling Systems DIRECT to the public Re: 3 phase or single phase 8Oct 09, 2008 10:06 pm JellyLegs I was given a quote today for 5 zone, 8 outlets 12.5kw and was told single phase would be sufficient. Be careful with "sales" people and their recommendations. In our first home we had aircon installed by a large "reputable" company - a 12KW system r/c ducted on the single phase power. Imagine our shock when the lights dimmed every time the motor for the unit phased in and out! First reaction from the company concerned was to change our lightbulbs! After a lot of discussion, letters and a meeting with the Managing Director of the company himself, they ended up installing 3 phase power at their cost. When we built again a couple of years ago, we went through another company where the person who quoted installed systems and have been happy. IMO go with 3 phase power to be sure you won't have hassles. Re: 3 phase or single phase 9Oct 10, 2008 4:31 am 12 KW for air conditioning
Isn't it about time to build real houses that suit the climate rather than this fake flash cardboard/matchstick/brick veneer boxes Re: 3 phase or single phase 10Oct 10, 2008 1:11 pm Build your best windowexpert and I can pretty much guarantee you I will still need air conditioning;) Heater? Not so much, but definitely aircon.
I guess I'm just hot blooded:) Greg Re: 3 phase or single phase 11Oct 10, 2008 2:00 pm Hi Greg,
Thick solid walls(High thermal mass), shutters on the windows, overhanging roof, superior insulated roof and no dark surface on the outside and you don't need airconditioning. People have lived for centuries without airconditioning and I know a lot of very old buildings in Europe with are so pleasant during the summer heat. You don't want to go outside anymore But the cardboard/matchstick construction method is just not up to the climate unless you live somewhere with temperatures between 15 and 22 C all year round day and night. And the dark exterior colours is just another dumm idea of some silly designers Re: 3 phase or single phase 12Oct 10, 2008 2:50 pm Well, I for one like the dark colours, but that doesn't mean I would build a black house and black roof:)
Confortable for many is not comfortable for me. You know when you're driving in a car with a group of people, and one of them refuses to put the window up, meanwhile the others are complaining of the cold? Well, that one is me who wants the window down:) It's 21 outside right now, and I'm sitting on our sundeck. Most people would find that comfortable, but I find it quite warm, just sitting here doing nothing. I think my wife would be fine most of the time without AC even in our 50 year old, no insulation, brick and matchstick house with no weatherstips even. I often think of those guys in the old west taking a bath once a week, no ac, hot as heck in the California sun, and I think Gosh I AM SO LUCKY Of course, need is a relative thing. I don't neeeed it, but I really really really want it:) Hey, if the council let me put up a windmill to generate my own power I would do it. But, they won't. Greg Re: 3 phase or single phase 13Oct 10, 2008 10:26 pm Quote: and I know a lot of very old buildings in Europe with are so pleasant during the summer heat. Yes, but Europe's summers are a lot milder than Australia's Jellylegs, we are paying 11.5 K for 5 zone, 8 outlet single phase , single story house, so your quote sounds around the mark. I am happy to pay money to install airconditioning, obviously I am trying to minimise use by other measures - eaves, shutters, insulation etc - but we regularly reach over 40 deg here in summer. I will only use the aircon when neccesary but days like that will be very glad we have it Re: 3 phase or single phase 14Oct 11, 2008 3:20 am Quote: Yes, but Europe's summers are a lot milder than Australia's They say that the winters are a lot colder in Europe, which it's true , but fact is the coldest and most uncomfortable houses I have lived or stayed in during my life were in Victoria and in New Zealand Summers in Europe are mosltly hotter compared to New Zealand and again the houses in NZ are much hotter and uncomfortable in summer If you go to Europe an build a house with the same cardboard, matchstick, brickveneer or wheatherboard and dark roof (which was a fashion there in the 70's) you will find that unbearable hot in summer. You can easily get 35 Celsius in Europe too I have lived long enough on either side of the world to tell that the standard houses in Australia and New Zealand are not build for the local climate. Re: 3 phase or single phase 15Oct 11, 2008 11:20 am When I visited the Solar house in Subiaco (Perth) last year it had a graph of temperatures recorded over the whole year, hanging on the wall. The highest temperature recorded was 28, the lowest 18. The house was a display and had no tenants during that time, so nobody was closing the courtains when the days were hot and opening the windows for the breeze at night. If it had been occupied, the results would be much better. The house was built using passive solar principles, mentioned by Windowexpert, had no airconditioing and no heating.
Quote: the coldest and most uncomfortable houses I have lived or stayed in during my life were in Victoria I'm in Perth, but it's exactly my experience. My European guests confirm it strongly! Chris My father rode a camel, I drive a car, my son flies in a jetliner, his son will ride a camel.Saudi saying Re: 3 phase or single phase 16Oct 13, 2008 2:49 pm kristofw When I visited the Solar house in Subiaco (Perth) last year it had a graph of temperatures recorded over the whole year, hanging on the wall. The highest temperature recorded was 28, the lowest 18. The house was a display and had no tenants during that time, so nobody was closing the courtains when the days were hot and opening the windows for the breeze at night. If it had been occupied, the results would be much better. The house was built using passive solar principles, mentioned by Windowexpert, had no airconditioing and no heating. Quote: the coldest and most uncomfortable houses I have lived or stayed in during my life were in Victoria I'm in Perth, but it's exactly my experience. My European guests confirm it strongly! Chris 28 is too high for me, I would still want A/C. At this stage of the game, not having it will hurt resale value. Sad, but true. Greg Re: 3 phase or single phase 17Oct 13, 2008 3:38 pm Quote: 28 is too high for me, I would still want A/C. Maybe you should try to acclimatise a little better to Oz weather. Quote: At this stage of the game, not having it will hurt resale value. Sad, but true. Chris My father rode a camel, I drive a car, my son flies in a jetliner, his son will ride a camel.Saudi saying Re: 3 phase or single phase 18Oct 13, 2008 4:45 pm kristofw Quote: 28 is too high for me, I would still want A/C. Maybe you should try to acclimatise a little better to Oz weather. Chris Would you say that to me if my signature didn't tell you who I was? What if I wrote all that stuff above and I was an Aussie? Do you know anything about the weather where I'm from? Maybe I should try to grow wings and fly too. I am acclimatized as much as I'm going to get. I came from California that has roughly the same temps and conditions as Sydney. I lived there most of my life, so nothing is going to change on my end. My point in all I've said is that it's fine and dandy for all you eco fanatics to tell me not to put in AC, but some of us are different to you, and we will have things like AC. I am happy to pay for it, and happy to pay for renewable energy sources to power it if and when they become available. I'm not saving the world today, just myself. No more dead horse beating, me included. What was this thread about? 3 Phase:) Yes, get 3 phase:) Greg Re: 3 phase or single phase 19Oct 13, 2008 9:36 pm Gpierce,
Quote: all you eco fanatics to tell me not to put in AC Stuff abour acclimatising was indeed personal, I apologise. I never recommended that you don't put in AC. All I ever said was that in a well designed house it's not necessary for most people. If you like it cold, you can put in a 30kW unit in and your own power plant in your backyard, for all I care. Chris My father rode a camel, I drive a car, my son flies in a jetliner, his son will ride a camel.Saudi saying Re: 3 phase or single phase 20Oct 14, 2008 3:14 pm Hi Chris,
Some tell me to acclimatise too when I am talking about the cold and damp houses around here 1 62024 Hello All 🙂 We are planning to start our journey of construction our first home. We zeroed down on Metricon and henley homes based on design suitable for our lot and… 0 8205 |