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[CBBB]

And btw, Harmonics is the science of SOUND. I did it at uni as an Electronics engineer many moons ago…

So you know better then!

[Sotos]

Thanks GR. When you say "zone control" can you actually set the temperature different in each room?

Yes, and its good to know the exact temp of each room at a glance.

What benefits does this system have from the usual split units?

Pros:

1. No monstrosities hanging on the walls, just sleek ducts on the ceiling.

2. One or two big compressors do the work of many little ones.

3. There are smaller air-intake ducts in every room that recycle and process the air. This ensures that existing air in the room is constantly cycled thereby eliminating air pressure buildup. (btw, this air processing is especially good for smokers like me!)

4. The system can easily accommodate a humidifier if desired that would have an immediate effect throughout the house.

5. Being 3-phase means more power efficiency and the ability to use industrial-strength equipment. A split unit won’t last anywhere near a system like this.

6. Powerful stuff… you can raise the temperature of say 100^2m from 15c to 25c in about 20 minutes! I can’t see that happening with split units!


Cons:

1. You’re committed to the specific company that supplied and installed the system for maintenance and parts because it’s hard to find another that has exactly the same equipment. (Only compressors are interchangeable)

2. Higher initial cash outlay for such a system… I think about twice the cost.

3. Your attics are taken up by the system. You can still use them for storage space etc but that’s it because it gets messy up there.

4. Higher parts costs. ie: If a compressor needs replacement you’ll need $2,000 to $3,500!


There are probably a lot more pros and cons but that’s all I can think of right now.

Thanks GR. I was planning to install many AC units ... around 10, and when I saw your system I assumed it would be cheaper. Are you sure it would be more expensive? How much space in the ceiling does your system need?

[supporttheunderdog]

And btw, Harmonics is the science of SOUND. I did it at uni as an Electronics engineer many moons ago…

So you know better then!

No he dont - nearly anything that has a wave form might generate Harmonics including radio waves, where harmonics can case RFI.

http://www.pateplumaradio.com/genbroad/harmonics.htm

[GreekIslandGirl]

Hello,

we are planning to build a house, and we are at the point were we are thinking about specific details!

Hello

Would you like me to help you pick a colour scheme?

[Get Real!]

And btw, Harmonics is the science of SOUND. I did it at uni as an Electronics engineer many moons ago…

So you know better then!

No he dont - nearly anything that has a wave form might generate Harmonics including radio waves, where harmonics can case RFI.

http://www.pateplumaradio.com/genbroad/harmonics.htm

We’re learning new things here… the harmonics of an air conditioning system!

The frequency, or hertz, or cycles p/second, or 1/T, is FIXED as supplied by the electricity authority (AHK) with probably a slight tolerance, so what on earth are some of you people on about worrying about harmonics???

[Get Real!]

Thanks GR. I was planning to install many AC units ... around 10, and when I saw your system I assumed it would be cheaper. Are you sure it would be more expensive? How much space in the ceiling does your system need?

I'm not sure... I paid about CY₤7,500 during the last year we used the pound for the system, so you do the maths.

As for space in the attic... lots! Those aluminum hoses that spaghetti around to reach each room have a radius of about 40cm! There are wires (sensors) coming off some of the junctions that makes walking about tricky.

It’s hard to explain but feel free to come and have a look if you like.

[yialousa1971]

Hello,

we are planning to build a house, and we are at the point were we are thinking about specific details!

Hello

Would you like me to help you pick a colour scheme?

Blue and White.

[johbee]

And btw, Harmonics is the science of SOUND. I did it at uni as an Electronics engineer many moons ago…

So you know better then!

The title of the page is "3 Phase Power" and the brief description refers to balanced loads of three phase power. Harmonics not only refer to sound, but I will not attempt to educate you on the matter (Just google it). If you studied electrical engineering then you should know the importance of load balancing. As someone said though this is off topic and I will not carry on further. Thanks for the tips on the AC though.