Browse Forums Heating, Cooling & Insulation 1 Jul 15, 2012 12:07 pm We have come across the Ventis Home Ventilation system at a recent Home Expo and were wondering if anyone has used this system and how effective it was for heating and cooling. We are considering this instead of ducted air-con with a gas heater and possibly a split system for extreme weather but were wondering if this would be sufficient on most days. Re: Home Ventilation Systems 2Jul 20, 2012 10:18 am The effectiveness of their systems seems to depend on where you live and what kind of climate you have. This thread here is one I read a month or so ago when I was looking at their product. http://forums.whirlpool.net.au/archive/1800220 Apparently Ventis seem to be expensive for what they deliver. Stewie Re: Home Ventilation Systems 3Oct 08, 2012 5:50 pm I looked at using this system but had 3 concerns (1) taking air from the roof space direct into the home even though a HEPA type filter is used will not remove volatile organic compounds likely to be found in the roof space from insulation binder such as the carcinogen, Formaldehyde. need activated carbon filter. Plus need to constantly change dust filter (2) Air in roof cavity during summer will remain very hot until late. Therefore cannot use system until late in night but need it 7pm. (3) There is little heat in a roof space during winter - only 3-5 degrees C extra. This will be used up in no time. Hence did not see value in concept. Re: Home Ventilation Systems 4Oct 26, 2013 8:05 am Hello, I'm the Founder of Ventis and am quite happy to answer any questions that may arise. There have been 3 valid queries regarding the system above which I'll briefly address. Using roof cavity air has been passed by the Building a code of Australia and we have published the report on our website. The filters we use ensure the air is of considerably higher standard than found in most homes. Activated carbon filters are available for certain applications. We will not install a system where roof air is passed over any asbestos surfaces. Air in the roof can remain hot long into the evening if not evacuated or the roof space can be bypassed and air drawn directly from outside to speed up the cooling. In winter when the sun is shining, the roof surface continually radiates heat into the roof cavity. It is a supply of energy that does not stop when the warm air is pushed into the home. We expect on average 6-8 hours of continuous warmer air to be available and this can range from 3-12 degrees. Our test cases show an average internal home temp improvement of 3-5 degrees. Clearly there needs to be sun of the roof. The experience home by home is the result of many variables and how well your home respects the energy that is being introduced. That's why some homes get better results than others in terms of heating. Air quality improvements are more consistent. Hope this helps and I'm always happy to provide any evidence as required. Thanks ....... Blair Re: Home Ventilation Systems 5Dec 13, 2013 5:55 pm For years I've been contemplating how to make the most of the hot air in my ceiling and the cool air under the house. I've blogged about it a number of times, and then came across Ventis. One of my initial blogs on Ventis is found at http://onsolution.com.au/blog/2012/ventis-solar-energy/. There are a number of key points to consider when looking at their system: 1. It is not an air-conditioning or heating system. That is, there is no active part of the system that will heat or cool your house. It is simply a fan, tubing and a controller. 2. There is a stack of FREE heat sitting in your roof. We are so preoccupied with getting rid of it in summer that people see it as an evil. Ventis gets it into your house in winter. Is it enough to warm your house all day? No. Will it heat your house at 6AM? No. Your roof hasn't been exposed to the sun so hasn't heated up yet. Will you use another heating source? Yes. But will you use it a lot less? Yes. Will you save money? Yes. 3. It's not just about heating and cooling, but about fresh dry air. It's about air-quality. In the middle of winter and summer houses are sealed up type to stop breezes. What we are doing is trapping all of our CO2, and pollutants inside. Check out sites like [url]keepalert.com.au[/url] for the impact of high CO2 levels. Ventis ensures that at least once a day your house is flushed with fresh air, that is at the right temperature. That's priceless. There is a payback period on the money you save from heating and cooling, but the health improvements will be harder to measure is possibly more important. Re: Home Ventilation Systems 6Oct 15, 2014 6:48 pm Hi everyone. I would like to renew ventilation system in my house, so I need a few parts. Above all, I would like to buy a new Ventilation fittings. I've been thinking over the selection and thought about this ventilation fittings from CentrumKlima. What do you think about my selection? Maybe folks over in this forum can share their insights and experiences; it will really be appreciated! Re: Home Ventilation Systems 7Oct 16, 2014 7:15 pm andy821 Hi everyone. I would like to renew ventilation system in my house, so I need a few parts. Above all, I would like to buy a new Ventilation fittings. I've been thinking over the selection and thought about this ventilation fittings from CentrumKlima. What do you think about my selection? Maybe folks over in this forum can share their insights and experiences; it will really be appreciated! any reason why you're chasing stuff from a uk supplier? What have they got that you can't get here? Can you elaborate what it is exactly you're after? Re: Home Ventilation Systems 8Oct 26, 2014 9:50 am The Best home ventilation system is FREE (nature) and my advice is to have your new house properly designed by an Environmental Engineer/Specialist who will give you scientific proof as there is more physics to it than just air flow... IMHO it is all about Lifestyle Engineering Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Home Ventilation Systems 10Oct 27, 2014 8:15 am Lorri Hi all, StructuralBIMGuy, what advice would you give to people when they are planning a new home? I would rather use nature than artificial means if I knew what to do. Cheers Lorri Hi Lorri, The easy answer is to stay away from 'cookie cutter' homes from the big project home builders. These are designed to a price and rarely suit (in respect to solar orientation and prevailing winds) the block you wish to build on (if ever). If you do want to stick with a design from a project builder that you particularly like have a read up on energy efficient (passive) designs. This website is a good start: http://www.yourhome.gov.au/passive-design and see if you can apply some of the features/designs into the project builders design. It's a good idea to read through this regardless of who you build with so that you get a better understanding of what can be done. The harder answer (more time consuming and costly) is get your home designed to suit you location. Whether this is done by a home designer, an architect, or a small custom builder it doesn't matter as long as they can demonstrate they have built/designed homes before that meet your expectations. One thing to remember, no one cares more about your home than you do so the more you learn about the process the better off you'll be in the end. ----------------------------------------------- http://pab34newdigs.blogspot.com.au/ ----------------------------------------------- Re: Home Ventilation Systems 11Oct 27, 2014 8:45 am Lorri Hi all, StructuralBIMGuy, what advice would you give to people when they are planning a new home? "Live in it..solving all the issues..prior to building it." This is easier said than done as we are all experts in hind sight As an engineer/problem solver I am seeing many advances in Lifestyle engineering software where this is now becoming Reality Lorri I would rather use nature than artificial means if I knew what to do. Me to..Stay tuned we are all in for some exciting new developments Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Home Ventilation Systems 12Nov 08, 2014 8:21 am PAB_34 Lorri Hi all, StructuralBIMGuy, what advice would you give to people when they are planning a new home? I would rather use nature than artificial means if I knew what to do. Cheers Lorri Hi Lorri, The easy answer is to stay away from 'cookie cutter' homes from the big project home builders. These are designed to a price and rarely suit (in respect to solar orientation and prevailing winds) the block you wish to build on (if ever). If you do want to stick with a design from a project builder that you particularly like have a read up on energy efficient (passive) designs. This website is a good start: http://www.yourhome.gov.au/passive-design and see if you can apply some of the features/designs into the project builders design. It's a good idea to read through this regardless of who you build with so that you get a better understanding of what can be done. The harder answer (more time consuming and costly) is get your home designed to suit you location. Whether this is done by a home designer, an architect, or a small custom builder it doesn't matter as long as they can demonstrate they have built/designed homes before that meet your expectations. One thing to remember, no one cares more about your home than you do so the more you learn about the process the better off you'll be in the end. I couldnt help but notice your avatar is a 3D designed House....but you have referenced 1D energy simulations In defense of Large project Builders....That's incorrect saying large project builders havent offered cookie cutter solar/environmental designed homes, for some have tried it and it hasnt worked. Years ago a prominant large WA project builder went down the path of designing homes according to One Dimensional (1D) simulations http://www.yourhome.gov.au/passive-design and in a nut shell they lost money, faith and sadly probably wont go down that path again for a long time. Their valid reasons were. 1.The design principles were costly and IMO by todays engineering simulations (4D= 3D + Time) would prove inaccurate (20% cost increase & 40% accuracy) 2.When they finally sold their display homes the valuations were way under the cost so they lost a lot of money. 3. Any conservative valuer will tell you it is near impossible to accurately evaluate energy data to costs savings and I would have to agree, based on the above passive-design principles (1D) you have reference. 4.Even Architects that pride themselves with built-environment Software that supposedly simulates your 3D Home & Environment only factors in a few coupled variables (insulation and heat) what about all the other variables (ie wind, temp,velocity,direction,type, thermal flow,shielding, solar shading.... etc,etc) the Designers/Architects results can be 20%-100% out for which the home builder pays a lot of money for....? 5.Why should Clients/LargeBuilders have to familiarize themselves with complex energy principles some have tried it... in the end they are basically bewildered,confused (and not math calculus PDE experts) and loose interest. So Because of the above reasons , I think your comments directed to large Project Builders are unfair and uninformed. My question is what are clients prepared to pay for amazing designs with accurate lifestyle simulations and data that empower them to make the right decisions......App anyone? A fair ratio imo would be 20% cost increase for 80% lifestyle accuracy..... Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Home Ventilation Systems 13Nov 08, 2014 2:52 pm StructuralBIMGuy I couldnt help but notice your avatar is a 3D designed House....but you have referenced 1D energy simulations In defense of Large project Builders....That's incorrect saying large project builders havent offered cookie cutter solar/environmental designed homes, for some have tried it and it hasnt worked. Years ago a prominant large WA project builder went down the path of designing homes according to One Dimensional (1D) simulations http://www.yourhome.gov.au/passive-design and in a nut shell they lost money, faith and sadly probably wont go down that path again for a long time. Their valid reasons were. 1.The design principles were costly and IMO by todays engineering simulations (4D= 3D + Time) would prove inaccurate (20% cost increase & 40% accuracy) 2.When they finally sold their display homes the valuations were way under the cost so they lost a lot of money. 3. Any conservative valuer will tell you it is near impossible to accurately evaluate energy data to costs savings and I would have to agree, based on the above passive-design principles (1D) you have reference. 4.Even Architects that pride themselves with built-environment Software that supposedly simulates your 3D Home & Environment only factors in a few coupled variables (insulation and heat) what about all the other variables (ie wind, temp,velocity,direction,type, thermal flow,shielding, solar shading.... etc,etc) the Designers/Architects results can be 20%-100% out for which the home builder pays a lot of money for....? 5.Why should Clients/LargeBuilders have to familiarize themselves with complex energy principles some have tried it... in the end they are basically bewildered,confused (and not math calculus PDE experts) and loose interest. So Because of the above reasons , I think your comments directed to large Project Builders are unfair and uninformed. My question is what are clients prepared to pay for amazing designs with accurate lifestyle simulations and data that empower them to make the right decisions......App anyone? A fair ratio imo would be 20% cost increase for 80% lifestyle accuracy..... Interesting response StructuralBIMGuy, Let me address some of the points you made in no particular order: 1) Putting your spin on what I said so you can offer up your opinion of my comment being "unfair and uninformed" and listing five reasons why (which I'll get to later) is an interesting way to construct a response. Nowhere did I say “large project builder’s haven’t offered cookie cutter solar/environmental designed homes”, I said that they don't offer any now. Having been through the process of looking through dozens of project builders designs and ending up designing and using a small local builder to build my home was because I couldn't find a project home design that both suited our requirements and (at even a basic level) make the most our north facing block and prevailing winds. This experience is what my (real) comment was based on - not uniformed nor unfair. 2) My advice to look at “1D solutions” was an answer for Lorri so that she would get her head around some basic concepts (in home design) that affect the ‘comfort’ of a home using 'natural' means. It was not directed to a professional designer such as yourself having adequately shown your vast areas of expertise with your sig line. 95% (or more) of people here don’t / won’t know anything about what is required (design wise) to achieve a home that is comfortable (in their location) using passive heating/cooling design systems or features. Nor will they know the processes to calculate the energy gain/loss of a building (to achieve/maintain this comfort level) i.e. the number of variables that go into these calculations which still only give a static ‘answer’ for one specific time of the day/year. To resolve a building design thoroughly does require dynamic simulations, I assume that’s what you are referring to as ‘lifestyle engineering software’ even though I've never heard this term before (and nor has Google https://www.google.com.au/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=%22lifestyle+engineering+software%22 if that's any measure of things – is this some specific software you’re pushing?) 3) “Their valid reasons were” and you go on to list a number of points: Point 1, A mix of their reason and your opinion (which is not their reason) Point 2, It is probably very true but I did make note of this point with cookie cutter designs where I said “These are designed to a price” Point 3, I don’t actually understand what this has to do with either ‘their’ valid reasons or trying to answer Lorri’s question Point 4, I doubt this was a reason that the project builder sited for abandoning their designs, it actually reads as a personal bias against architects that don’t perform or meet your expectations Point 5, Again, I doubt this was a reason from the project builder. Excluding clients from the next two comments as they are the one paying the bills, NOT the designers: .....a) You’re writing off builders as “bewildered & confused”.....Why? A project builder employs architects/designers to come up with designs that are cost based, not ‘comfort’ (for want of a better word) based, nothing to do with being bewildered and/or confused. .....b) “Why should…LargeBuilders have to familiarize…” – because that’s the market they are in and if they want to remain relevant then they have to make use of current technology and systems. Also, a small driving factor is CLIENT REQUIREMENTS/EXPECTATIONS! 4) I must admit I don’t even understand the question you've asked in your last paragraph but if you think that clients will happily hand over another 20% of the building cost (another $100K on a $500K build) for 'lifestyle accuracy' (whatever that actually is - Googled that as well for a laugh https://www.google.com.au/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=%22lifestyle+accuracy%22) - Good Luck! Also, the fact you mention an “App” I'm guessing (again) that you’ll soon have some ‘lifestyle engineering software’ ready for us all to download......I can't wait! ----------------------------------------------- http://pab34newdigs.blogspot.com.au/ ----------------------------------------------- Re: Home Ventilation Systems 14Nov 08, 2014 9:02 pm Well I'll do my Best with developing the App and I dont know if I'll be able to simplify the presentations to the standard you have referenced above (That is without Data)...but you can be assured it will be very accurate and reliable when all the lifestyle physics is coupled to the app... Google that. Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Brass fly wire, you will need to cut it, shape it and jam it into brick slots 1 7464 We already paid for somfy motors for the blinds. The quote above was purely for “pre-wiring” so the blinds company can install the motors and blinds. That’s why we… 5 16263 |