Browse Forums Heating, Cooling & Insulation Re: aircon system: which is system lifecycle economical to r 3Mar 04, 2015 6:29 am Building Services Engineer Renovating our 1960's modernist home in Brisbane https://forum.homeone.com.au/viewtopic.php?f=53&t=82091 Re: aircon system: which is system lifecycle economical to r 4Mar 09, 2015 10:50 am Skull Hi all - I need your insights on this. I am building a house and I plan to make the aircon system as economical to run as possible; I can either use the following or its combination: 1. multi-head (4) split system 2. wall mounted split type 3. ducted The most economical will be the wall mounted splits, up to a point, then Ducted becomes better. Multi-head has some overheads with extra gas pumping and so forth. From a purchase stand point, wall splits are cheapest, and multi-head or ducted will be about the same price. I was recommended against a multi-split as they are (apparently) not as reliable as standard units, and if the unit fails, the whole house AC goes with it. I recently went through the same considerations and almost went for wall mounts throughout the house. Ended up with a ducted + wall split in the master bedroom. Run the ducted during the day, and wall split (which is much cheaper to run) at night as i was only wanting to cool my one bedroom. I had a 5kw solar system installed, and with my 12.5kw ducted system running full on, i pay nothing for electricity during the day. By the time the sun is going down, my house is 24 degrees and the AC idling/low power. It uses around 1.3kw in low power mode, so it costs not a whole lot to run once it reaches the temp. Wall splits will probably still be cheaper to run, but you can't beat the unobtrusiveness of ducted. The wall split on the other hand is one of the new Daikin P series 3.5kw. I leave it on overnight. When i woke up at 6:45am and turned it off, the power meter was registering 1.7kw of usage overnight. That's pretty damn low. You can get some more advanced ducted systems where each room has a temperature controller with individual dampeners. It adds a few thousand to the cost of your system though. I opted not to have it installed, although i wish i had the cash to. Or the Actron ESP Platinum systems allow for individual zone operation and don't require a dump zone. Skull Below is a quick description of the areas of the house that I am about to build: Open plan dining/living/kitchen 41 square meters 4 bedroom at 12 square meters on the average 1 cinema at 20 square meters 1 activity room at 12 square meters What system, or its combination, can you recommend? Thank you. That's 121sqm. Is it a small house? That's not a whole lot of space. I think your kitchen measurements are a bit off. But if it is correct, a 10 or 12.5kw ducted will work great. Any of the major brands will do you well (Daikin, Mitsubishi Heavy Industries, Toshiba, ME). Would stick clear of Samsung AC's and any other cheap brand. You get what you pay for. My Noosa 23 Build - viewtopic.php?f=31&t=72782 7 6272 I had a similar issue with my fridge not too long ago. It wasn't the same model, but the symptoms were pretty much the same: the compressor would start and then stop… 3 8661 The unit normally clips into a metal plate screwed to the wall, either plate is not flush, or unit not hooked in and could be hanging from the pipes partly, either might… 2 15899 |