Great video! I'd be interested to see ERV/HRV systems and their use cases here in Australia. Perhaps also dedicated make-up air for these fans and range hoods
Would also be nice to see some retrofit product recommendations for these cheap fans. Changing from big round hole in a ceiling to a small one (or smaller square) is not a small task, with plastering and repainting
Great vid guys! Looking forward to more. I put an externally vented duct on our axial fan and did a heap of draught sealing and came across the same issue - it didn't work! Upgraded to an in-line mixed flow fan and its working as intended. Fan noise was another challenge. Took me a long time to realise the sharp bend in the duct under the insulation was contributing to the noise. Sick of going into the roof. Glad its done now 😊
Great video! Love these comparisons. One question I have is whether there are any negatives to using vents that have LED light built into it with the vents around the sides?
Just applied at the principals to a tee for our bathroom with a 150mm in line fine with a back straight damper, semi rigid ducting and an exhaust to the roof. Still the fan is quite loud and the bathroom still does build up steam and moisture on the walls. I am wondering how much the ceiling grille performance can effect this as we currently have a 600x100 linear grill across the shower door opening
Great points. I’m concerned that condensation sucked through the vent into the cold ducting will condense in the ducting, pooling somewhere along the ducting.
In a perfect world ducting should be insulated to the point of exit, and travel to its highest point as quickly as possible before taking a consistent path down to the exit point. In a ceiling space with a pitched roof that's usually easy and even uninsulated ducts won't have pooling and any condensate will quickly evaporate back into the air passing through. Unfortunately some (a lot) of tradies can be interesting in their approach
Hi mate. Any good recommendations for integrated heat lamp and exhaust fan units? Love the channel keep up the fantastic work! Awesome to see local info on this stuff.
I just installed a centrigufal fan (not a Panasonic) and - even after adding a speed control to slow it down to suit the room size - its motor is noisy. The airflow is fine and not intrusive, but the hum from the motor is quite alarmingly loud. I think for this reason, I would next time use a mixed flow inline fan inside the roof space instead of one of these mounted right on the ceiling.
So what is the Australian building standard for intalation of ventilation fans in SA? We have a new house that is lest then 12 months old and they have installed the basic ceiling fan in the wc that vents straight into the roof space. Is this standard procedure or should they have used a different product?
In Australia it's pretty much a given that the makup air will be coming from outside. With this in mind, would it be better to have a dedicated ERV/HRV and dehumidifier system to provide makup air..... OR just crank the heating/ cooling to condition the infiltrated air (keeping in mind I've already paid to condition the now exhausted air from the bathroom). Either way it sounds like it's going to put a nice sized hole in my pocket. But with the ERV route it at least feels as if I'd have some control of the makup air like filtration and such.
When you build an air tight house, ventilation is very important, but also is an energy recovery system. It would be a big waste to shoot out the nicely heated or air-conditioned air to outside.
Australia isn't up to that standard. Air tight houses require air exchangers that detect moisture, CO2 and other pollutants such as when cooking with gas. I wish that is standard though.
@@mr_mysterious_6174 you would hope for the replacement air to be coming from the house, so it should be able to leverage more from living area heating systems. Unless you leave your bathroom window open.
@@ecoevo People living in not-so-well-insulated homes may want to keep their bathroom always warm without heating the whole house. This can be achieved with infared heaters that can be programed to keep the bathroom at a set temperature. If the fan is always running the heat would be lost.
Also wind can easily pass over 20Pa pressure and make the shitty fan not move any air at all or go the wrong way. Anyway those fant who blow straight in the attic should be ILLEGAL!!! Those would never be approved for use here in Norway at least!
This video puts me to shame! I live in South Tasmania, We have a tastic in the ceiling of the bathroom which vents directly into the ceiling. We also have one of those axial type fans that vents directly outdoors but it gave up the ghost years ago. What do I do? I have two huge holes in my bathroom?
Great video! I'd be interested to see ERV/HRV systems and their use cases here in Australia. Perhaps also dedicated make-up air for these fans and range hoods
Yeh I want to replace my bathroom fan with an externally ducted one but also a HRV system. Also need one for the toilet/laundry area...
Would also be nice to see some retrofit product recommendations for these cheap fans. Changing from big round hole in a ceiling to a small one (or smaller square) is not a small task, with plastering and repainting
Such an useful and educative video...I love this channel for the value it provides to the common man.
@@jims2020 Empowering a consumer is a good way to get better outcomes.
@@ecoevo what are some good centrifugal exhaust fan models we could consider installing ?
Great vid guys! Looking forward to more.
I put an externally vented duct on our axial fan and did a heap of draught sealing and came across the same issue - it didn't work! Upgraded to an in-line mixed flow fan and its working as intended.
Fan noise was another challenge. Took me a long time to realise the sharp bend in the duct under the insulation was contributing to the noise. Sick of going into the roof. Glad its done now 😊
Great video! Love these comparisons.
One question I have is whether there are any negatives to using vents that have LED light built into it with the vents around the sides?
Would be good if you’ll could cover rangehood as well
This is great. Looking forward to seeing more.
Just applied at the principals to a tee for our bathroom with a 150mm in line fine with a back straight damper, semi rigid ducting and an exhaust to the roof. Still the fan is quite loud and the bathroom still does build up steam and moisture on the walls. I am wondering how much the ceiling grille performance can effect this as we currently have a 600x100 linear grill across the shower door opening
Great points.
I’m concerned that condensation sucked through the vent into the cold ducting will condense in the ducting, pooling somewhere along the ducting.
In a perfect world ducting should be insulated to the point of exit, and travel to its highest point as quickly as possible before taking a consistent path down to the exit point. In a ceiling space with a pitched roof that's usually easy and even uninsulated ducts won't have pooling and any condensate will quickly evaporate back into the air passing through. Unfortunately some (a lot) of tradies can be interesting in their approach
The Panasonic fan recommends a 100mm pvc pipe on a slope, so any condensation will travel outwards.
Hi mate. Any good recommendations for integrated heat lamp and exhaust fan units?
Love the channel keep up the fantastic work! Awesome to see local info on this stuff.
Similar to the door vent we just designed and released, we are thinking about designing one of these too, keeping in mind building performance.☺️
@@ecoevo I’d be keen and I know lots of clients would be too. Surely there’d be an ever growing market with efficiency requirements and whole of home.
I just installed a centrigufal fan (not a Panasonic) and - even after adding a speed control to slow it down to suit the room size - its motor is noisy. The airflow is fine and not intrusive, but the hum from the motor is quite alarmingly loud. I think for this reason, I would next time use a mixed flow inline fan inside the roof space instead of one of these mounted right on the ceiling.
Try Panasonic centrifugal and you will be amazed
Great video and info! Can you please test the very popular Ventair Sahara exhaust fan ?
What brand is the middle exhaust fan pls?
We may be able to accomodate that actually
So what is the Australian building standard for intalation of ventilation fans in SA? We have a new house that is lest then 12 months old and they have installed the basic ceiling fan in the wc that vents straight into the roof space. Is this standard procedure or should they have used a different product?
Love the crushed flex duct at 3:31 bet that run is getting the proper CFM
@@WilliePeck that crushed duct gets that house to 30pa. Installations in roofs are never perfect.
Really useful to learn.
I was also wondering about the advice to have a fan vented to exterior constantly running, which contradicts advice to seal tight.
@@sallybrown5071 continuous exhaust is low flow, as opposed to intermittent high flow.
you have a link for a door vent but no link for the exhaust fans you discussed?
This has been addressed now.
In Australia it's pretty much a given that the makup air will be coming from outside. With this in mind, would it be better to have a dedicated ERV/HRV and dehumidifier system to provide makup air..... OR just crank the heating/ cooling to condition the infiltrated air (keeping in mind I've already paid to condition the now exhausted air from the bathroom). Either way it sounds like it's going to put a nice sized hole in my pocket.
But with the ERV route it at least feels as if I'd have some control of the makup air like filtration and such.
Nice Johnny
When you build an air tight house, ventilation is very important, but also is an energy recovery system. It would be a big waste to shoot out the nicely heated or air-conditioned air to outside.
Australia isn't up to that standard. Air tight houses require air exchangers that detect moisture, CO2 and other pollutants such as when cooking with gas. I wish that is standard though.
Great video..
If you have your fan running on low all the time it would suck the heat out of the bathroom and it would always be cold?
@@mr_mysterious_6174 you would hope for the replacement air to be coming from the house, so it should be able to leverage more from living area heating systems. Unless you leave your bathroom window open.
@@ecoevo People living in not-so-well-insulated homes may want to keep their bathroom always warm without heating the whole house. This can be achieved with infared heaters that can be programed to keep the bathroom at a set temperature. If the fan is always running the heat would be lost.
Also wind can easily pass over 20Pa pressure and make the shitty fan not move any air at all or go the wrong way.
Anyway those fant who blow straight in the attic should be ILLEGAL!!!
Those would never be approved for use here in Norway at least!
@@tullgutten agreed, but roofs normally go into negative pressure. The chances of an inline fan being over ran by wind pressure is pretty low.
This video puts me to shame! I live in South Tasmania, We have a tastic in the ceiling of the bathroom which vents directly into the ceiling. We also have one of those axial type fans that vents directly outdoors but it gave up the ghost years ago. What do I do? I have two huge holes in my bathroom?
Good video JK