Browse Forums Heating, Cooling & Insulation 1 Dec 27, 2015 11:31 am I have a bedroom on the west wall. It is air/con-ed and has a fan. BUT - still gets hot. It has the laundry on one wall and the garage on the other - so two rooms that don't have air/con - then the outside west wall. I was thinking of an awning/blind of some sort - but the price was a shocka. Now I'm looking at tint. To do the bedroom and laundry. The room has a blind - but the heat is already in the room before it hits the blind. Re: West Wall Issues ? 2Dec 27, 2015 11:31 am Does anyone have any views on Tint - ie the "strength" needed to cut the heat ? AND - any other alternative ? Re: West Wall Issues ? 3Dec 27, 2015 11:44 am Hi Saint Mike, I don't know anything about tinting but I can recommend Renshade (basically Aluminium Foil laminated, perforated cardboard) for use in the summer to keep the heat out. It works very well on our west facing windows. Details on how it works here: http://greenityourself.com.au/projects/ ... house-cool We bought it from here: http://shop.ecovantage.com.au/renshade- ... w-shading/ Re: West Wall Issues ? 4Dec 27, 2015 11:54 am What did your energy report simulations include-> say? Did they not recommend low e-glass on the west side glass windows? Things/variable to consider when conducting Heat/Thermal flow simulations 1. Overhangs/eaves 2. Louvres 2. Insulation 3. adjacent Trees/ building shadings 4. Air flow and natural ventilation 5. Material heat transfer etc,etc Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: West Wall Issues ? 5Dec 27, 2015 4:26 pm Yes - thanks - but its built and I need an answer for that ... I have various options. Not sure on heavy tint - is it good ? Would solid louvres/slats be better. Heat transfer is the problem - and a west aspect. Re: West Wall Issues ? 6Dec 27, 2015 4:57 pm Currently have the same issue. Garage door is west facing and interior is up to 35 on 40 degree days. Insulating the door has helped but now looking at shade sails. The windows we have facing the same way are protected by canvas blinds externally and very thick curtains internally Re: West Wall Issues ? 7Dec 27, 2015 5:34 pm My thoughts are to use external shading. either cheap external blinds that you raise and lower manually (twice a day in summer) or electric blinds/shutters that can be raised and lowered automatically by a time clock in summer. In winter just leave the blinds up. as a bit of winter sun is a good thing. Re: West Wall Issues ? 8Dec 28, 2015 6:54 am Beetaloo My thoughts are to use external shading. either cheap external blinds that you raise and lower manually (twice a day in summer) or electric blinds/shutters that can be raised and lowered automatically by a time clock in summer. In winter just leave the blinds up. as a bit of winter sun is a good thing. Yes - its great in Winter ... Cheap is important. Re: West Wall Issues ? 9Dec 28, 2015 8:43 am You could plant some small deciduous trees to ensure that the western wall is in shade in the afternoon during summer. In winter the tree will have no leaves which will allow the sun to warm the western wall. Do you have decent eaves on that side (e.g minimum 600mm?) Yes tinting will give you pretty good bang for buck. Re: West Wall Issues ? 10Dec 28, 2015 3:04 pm 1960sModernistHome You could plant some small deciduous trees to ensure that the western wall is in shade in the afternoon during summer. In winter the tree will have no leaves which will allow the sun to warm the western wall. Do you have decent eaves on that side (e.g minimum 600mm?) Yes tinting will give you pretty good bang for buck. No - unfortunately - its my zero boundary and I used a lot for the garage. Even though - the sun is still lower than the eaves on our west side for quite a bit. I wasn't sure about tint - but if it can reflect/deflect the heat somewhat it might be good. The house is due north at the back - so as the sun swings around this part of the house cops it quite a bit on the west. Re: West Wall Issues ? 11Dec 29, 2015 11:35 am I also looked at those little air/con gadgets. Anyone used one - have one ? Around $600 - no water outlet needed but need air outlet. Re: West Wall Issues ? 12Dec 29, 2015 6:42 pm We had a portable air con in our last place for those days when the evap couldn't keep up. Was ~5kw unit if I remember correctlky and came with a kit that you plugged the exhaust hose into and fitted into a partially open window. Used it in a big room - combined kitchen/family and it did OK - the exhaust hose is a PITA and dictates you place the unit near a window. Re: West Wall Issues ? 13Dec 29, 2015 10:33 pm i had a small 2kW on which I used in the baby nursery pre-renovation. It worked reasonably well but noisy and had to locate it in front of the window as well. I don't have it anymore as I regifted it to family who needed it more than I did. Re: West Wall Issues ? 14Dec 30, 2015 4:38 pm Sounds the way to go - thanks. Awaiting a quote on Tint and Louvre awning. Re: West Wall Issues ? 15Dec 30, 2015 8:33 pm You said in your original post that the room is already air conditioned. So are you saying you are thinking of using a portable air conditioner in addition to the fixed air conditioner? Building Services Engineer Renovating our 1960's modernist home in Brisbane https://forum.homeone.com.au/viewtopic.php?f=53&t=82091 Re: West Wall Issues ? 16Dec 30, 2015 10:03 pm Forum member Bashworth had a similar problem with a couple of his windows posted in another thread that I can't find and he employed a guy to install tinting. He was very impressed with the difference it made to those rooms. Maybe send him a PM to see what brand was used. Stewie Re: West Wall Issues ? 17Dec 31, 2015 7:14 am 1960sModernistHome You said in your original post that the room is already air conditioned. So are you saying you are thinking of using a portable air conditioner in addition to the fixed air conditioner? Yes - but its on a zoned system and one zone is always on - so I didn't want to waste it. Our main BR has excellent air flow and is generally ok. I don't see the point in cooling the kitchen/family area when we are asleep. So - looking for a solution to this one bedroom. Rest of house is good. So - it would be used instead of - rather than in addition to. Stewie D Forum member Bashworth had a similar problem with a couple of his windows posted in another thread that I can't find and he employed a guy to install tinting. He was very impressed with the difference it made to those rooms. Maybe send him a PM to see what brand was used. Stewie Thanks Stewie. Been told tint is very good. My only worry - will it make room dark ? My other idea was to use a louvered outside attached awning style - horizontal slats. This would be about 20cms (?) off the wall/window and allow airflow - but stop the sun. Its a sort of "dead" side of the house and I'm not too worried about "looks". Will PM Bash tho. Re: West Wall Issues ? 18Dec 31, 2015 8:00 am Ah ok, I get it now. So when the AC is on, the room temp is fine? Portable ACs are quite inefficient. In a normal AC, two heat sources, the compressor and the hot air off the coil, are outside. In a portable AC these are inside, so the AC unit is constantly trying to cool against heat created by itself. The hot exhaust air is ducted to the outside via a window, but usually with an uninsulated plastic duct. You also need to make up a plate with a piece of ply or something to block off the rest of the window opening. Also, because it is ducted exhaust air to the outside, that means it's sucking in non-conditioned air from outside the room to replace the exhausted air, then it has to condition this new air. In most AC systems it recirculates the same air so once the air cools the system throttles back and idles. If the system is constantly having to condition new air then it has to run virtually full bore all the time. Re: West Wall Issues ? 19Dec 31, 2015 3:56 pm Liliana Hi Saint Mike, I don't know anything about tinting but I can recommend Renshade (basically Aluminium Foil laminated, perforated cardboard) for use in the summer to keep the heat out. It works very well on our west facing windows. Details on how it works here: http://greenityourself.com.au/projects/ ... house-cool We bought it from here: http://shop.ecovantage.com.au/renshade- ... w-shading/ Sorry - missed this one Lili. Will check into it - thanks. Hi I live in a 100yr old semi and my neighbour added an additional floor last yr and our architect has advised that we can knock down our semi and build a free-standing… 0 37600 Hi All It has been a few weeks since my last update. The build has been progressing well. No major issues to report. The scaffolding was dropped today, gyprock will be… 96 356652 It might be a bit darker in the mornings but the light is still light, so you should be getting it. Similar to what you see from your western windows 3 19909 |