Now considering that solar insolation is around 1000W/m2, imagine beaming 200 bar radiators onto the roof.
How much moving air or water do you think would be required each minute to keep the roof from heating up?
Browse Forums Eco Living Re: Roof space heat - eave vents and whirlybirds ... 23Nov 14, 2009 4:06 pm Builder; Big M Design; Soho 32 Facade; Ascent Blog; http://mickeyb-soho.blogspot.com Trend; viewtopic.php?f=31&t=23990 Re: Roof space heat - eave vents and whirlybirds ... 27Dec 15, 2009 9:16 pm Where you are coming from is where you are going to... Re: Roof space heat - eave vents and whirlybirds ... 30Dec 18, 2009 4:51 pm Where you are coming from is where you are going to... Re: Roof space heat - eave vents and whirlybirds ... 34Feb 12, 2010 12:05 pm Where you are coming from is where you are going to... Re: Roof space heat - eave vents and whirlybirds ... 37Feb 12, 2010 1:15 pm Good to here some more localised testing is happening Dymonite69... I have to agree. it is my finding also they make a diff' albeit here in the south west. We here are after all on the same latitude a Sydney, so I figure without expiriencial data we are quite blind as to the benefits. And hoping as you know is not good enough. perthhomelover - I imagine you will get a negative response... The thing that concerns me with roof painting, is that paint uses surfactants to help ingress the substrate. Surfactants are what are in your soap ...if you intend to harvest your roof runoff (rainwater) I would advise against it. kind regards, Onc Where you are coming from is where you are going to... Re: Roof space heat - eave vents and whirlybirds ... 38Feb 14, 2010 9:59 pm I have enquired about a solar-powered roof vent which was advertised in a local paper during the week. The product is called Solar Star by Solatube. They claim 1 of them is equivalent to 14 whirlybirds... http://www.sydneydaylight.com.au No pricing on their website, but there is pricing (US$?) on this one: http://www.ecohaus.com/C-22/solarstar+attic+fans Re: Roof space heat - eave vents and whirlybirds ... 39Feb 22, 2010 7:53 am Hi, Can anyone help here please. What is the best height/location to install whirly birds on a house? For example, when looking at the house from the street, should the birds be installed very high on the roof (close to the peak), or further down, maybe half way up the roof height? Other info: Concrete roof tiles, 25 degrees roof pitch, sarking, 2 whirly birds. My signature is distracting people from my wise posts ... Re: Roof space heat - eave vents and whirlybirds ... 40Feb 22, 2010 3:51 pm Seeing as heat rises, wouldn't it be common sense to put them as high as possible? BTW, No response from the company to my email requesting info on the Solar Star a week ago. Slack! (And now 3/3 companies to ignore emails/contact requests through their website in the last few weeks!) Old Home Restoration / Renovation Cheers mate! This is exactly what I was thinking but wasn't sure if it was something I'd find on the shelf. I agree with you, fixing the brackets to the board will look… 2 3276 retail its around double the price of a similar sized actron/dakin system from memory, They are excellent systems though. But with how builder gouge on AC/heating, you… 4 13789 Joe Apologies for the delay in getting back to you. If you haven't sorted this already you need to caulk this gap. Not sure where you are but if you are in Sydney I can… 5 4350 |