Browse Forums Heating, Cooling & Insulation 1 Nov 07, 2011 5:47 pm ------------------------------------------------------- http://homeinkalina.blogspot.com Enjoying our new Concerto with Allworth Homes in Kalina, The Ponds Handover - 28/06/2011 Re: Ducted Air con zoning question 2Nov 07, 2011 5:52 pm The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: Ducted Air con zoning question 4Nov 08, 2011 2:08 pm 'A bottle of wine contains more philosophy than all the books in the world.' Louis Pasteur Vegie garden: viewtopic.php?f=19&t=27637&start=0 My Backyard Adventure Re: Ducted Air con zoning question 19Dec 03, 2011 9:38 pm B STAR what you say above is correct to some level. However just because you run r/a pipes to each of the bedroom you will have better access to the air however you will also introduce additional loses and then the air cond actually works harder trying to move air around. These pipes will need to be long an thus the air in them will heat up from being in the roof cavity for too long. Basically in a domestic environment this is an over kill. Best to keep things simple and more reliable. You will also have trouble keeping the air outlet far away from the air in let. You will find that the bedrooms heat and cool very easily any way. Your points are well taken and make sense. However, I still feel that there is a fault with the present system of air conditioning. For example, in our new home we plan to have the Home Theatre at the back of the house on the Ground Floor. When we are watching tv at night we could just have that zone on, but the conditioned air would still have to return via a large part of the ground floor, up the stair well and to the ceiling return vent in the First Floor ceiling, thereby losing a huge amount of its heat (winter) or cold (summer). Also this would necessitate a gap, small, but significant, under the Home Theatre door, to allow such an air return, thereby undoing a lot of the soundproofing qualities built into the Home Theatre. You said that the air would heat up from being in the roof cavity for too long. However, I envisaged the return air ducting to be insulated in the same way the other air conditioning ducting is. You also said that the air conditioning unit would have to work harder to pump air back through return ducts. A valid point. However, my point would be that in the present designs, where the air conditioned air has to return under the doors of bedrooms and Home Theatres, that this greatly restricts air flow and places extra load on the unit. Some may reply that all the doors should be open. This is hardly a solution, because the whole idea of a Home Theatre should be that you can close the door so as not to disturb others inside or outside the house. Similarly, it is hardly practical to tell all residents and guests of a home that they must keep their bedroom doors open all night so that the air conditioner can work properly. I still think intelligently designed return air vents may be worth considering. Re: Ducted Air con zoning question 20Dec 04, 2011 8:09 pm First of all what heating/cooling system are you considering??? I have a basic brivis system where you cant control the output power of the compressor. So on a system like this it is use less designing a system to work with only one room. Secondly the more duct work you have in the roof the less efficient the system the system is. Just because you insulated it doesn't mean it will not heat up. I guess in a big house (very big house) this will be worth looking into, or even double storey houses. It should be possible to do with most system with current technology I have already thought about this previously. All you need to do is wire two zone motors on each relay. One for the air outlet one for the intake. But it still a little more complex than this. 0 6335 Hi all, sorting out the ducted air con for a 350sqm double story house. Does this placement sound reasonable to you? Also, I plan to have 6 zones I think. Living room… 0 0 Hi all, sorting out the ducted air con for a 350sqm double story house. I think i plan to have 6 zones I think. Living room (mainly for entertainment so not used often),… 0 0 |