Hi guys, looks a good system.. a couple of questions; is there an insulated ducting for this system to install in cold spaces (lofts) to prevent condensation? Also, with regards to heat loss through continuous ventilation would this be an expensive way to ventilate the home. As there is no heat recovery built into this unit, would it not be constantly pulling valuable heat from the home ?
@@danielwood5334 My understanding is that whole house ventilation systems often use heat exchangers to get round this issue. Perhaps beyond the scope of this video as it takes a bit of explaining, but definitely a pertinent point.
Surely this system is not very energy efficient in the winter? Pulling warm air from inside the house and throwing it outside, from multiple rooms. Can it be wired to only come on when switched on from each of the rooms with a duct fitted? Or does it run 24/7?
So don't run it in the winter. You are not obligated to run something in your house simply because it's there. You can simply run it only when doing activities that produce odours and deal with the heat loss, but otherwise leave it in the low setting or leave it off. You don't run your heat in the summer, right?
One of the other videos in this series strongly advises against using flexible ducting, this one highlights disadvantages with rigid ducting, although to be fair this green stuff although flexible, looks like a halfway house. I would be interested in thoughts/tests/comparisons on using this type of ducting with individual fans.
Would be interested to hear more about heat recovery systems. Single and/or multi room systems. There are a lot of cold damp houses in the U.K. and heat recovery might be a useful tech to help combat these issues.
Corrugated ductwork requires more power to move the same amount of air due to the higher pressure loss along the length. Fixed ductwork rather than flexible is always preferred for efficiency!
@@efixx thank you for the correction efixx. Is it available to buy over the counter as a consumer I'd like to try some with my portable air conditioner, say 125 mm DIA
Looks a neat system, everything is easy with web joists. Why is it everyone makes a big thing about for rated down lights, yet nobody gives two hoots about cutting a 4" hole in the ceiling and installing a fan with no fire collar. The only reason I can think is, the house is one fire compartment, and if that's the case technically we don't need to install fire rated down lights, a three storey house would be different, but the only place I could think fire rated down lights and a fire collar would be if they were being installed in a garage with a room above. Apologies for going off topic, just an observation.
Envirovent great fans. We had been using them for years. But they have gone down hill, I'm not sure what's happened but since the packaging has been rebranded we have had to go back to faulty units, not just 1 it was pretty much every unit. Never had any faulty products previously to this so my thought is that they may have changed manufacturing. We have had to source another brand.
We would be interested in hearing more about why this is and what fans you are using. The changing of the branding was not inline with any manufacturing changes. There have been changes to some products over the years as technology evolves and regulations change. however, Envirovent pride them selves on a quality product nd service. Please contact our customer care team if you feel this is not the case.
@@larrysoper4785 thank you for your response. We had used envirovent for many years and never had an issue until these S & P new packaging appeared so not sure what has been changed but for some reason we seem have an issue with them. Inline fans especially (MV250/100T & MV160/100T) and a centrifugal wall mounted unit. The SIL100T are still in stock with the original packaging and so not experienced any issues with these as yet. I have a new fan to replace a faulty one and this will be the 3rd replacement. The last 2 didn't want to work on fitting. I'm hoping this works this time. 🙏
Personally if I was going to the trouble of running ducts etc I’d want a ventilation system that included heat recovery. That just pumps the air you spent money heating straight outside.
Wow are we still installing new ventilation systems for homes that don't include heat recovery. The extra cost on new build is minimal and it is a big saving on home heating. So this is fancy tubing on a 1960 design.
@@caterthun4853 my thoughts exactly. You’re already 90% of the way there with a MEV… two more ducts and you can easily have the same with heat recovery
@@edc1569 building regs are changing, in fact we've got a change next year as a stop off point before future homes standards in 25..... Sadly ventilation is not sexy enough to warrant a house builder to fit more than they need to achieve compliance
@@edc1569 boggles the mind when today we are at a climate change summit! Not expecting Passivhaus house standards but in 2021 we should have more insulation, SOME solar, heat pump, heat recovery ventilation and a basic car charger in the regulations for new builds by now.
Is there a way to only pull air from the room where the humidity is, or is it detectable any humidity in any of the 3 rooms (example shown) and pull air from them all, potentially pulling warm bathroom air out even though no humidity detected ?
Hi Guy’s, Could you use this to move hot air, say from a south facing conservatory, to another part of the house that may be north facing. Slightly back to front I know but looks like it would work!
The issue might be how to get the ducting in a sympathetic and efficient manner from room to room. An inline fan as efixx showed recently would be more appropriate although every situation is unique
This is exactly the video I was looking for. Thank you. Now I am gonna research more on it. Trying to replace my existing Nuaire MEV-M+ which serves 2 bath and kitchen, but its malfunctions alot. I need to replace with something as powerful / efficient, if not more.
So can this not be installed in the loft? We are in the process of redoing all bathrooms in our house and they are all upstairs and the best location for this would be in the loft so that 1 unit can do the job instead of 3 separate fans. If that, then I assume we can’t use the green ducting as it will not be the same temperature and may cause condensation.. in that scenario, what ducting should we use? Insulated??
Insulated ductings should be used outside of the envelope. Heat recovery equivalent would be recommended though which would then feed warm, clean air into the habitable spaces.
Most centralised units are suitable for fitting in a loft space without the requirement for extra insulation. However, any ducting in an unheated area of a building (i.e. a loft space) does require insulation. With an MVHR system it is also important to insulate both ducts that run to/from atmosphere. The Domestic Ventilation Compliance guide provides some great information on install requirements for the different ventilation strategies assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/456656/domestic_ventilation_compliance_guide_2010.pdf
Nice system, worth considering for the future, i tend to fit MVHR's these days.. tip, use a double pole switch for running the boost and light switch.. tend to wire the lights in pvc t&e and the boost in lsf, saves confusion on the connections.. now for a few beers to destroy the mental image of Gaz sat on the khazi :)
Fast track ducting when designed as part of a mvhr system is a game changer. No contractor would willingly subject themselves to a week of more of screwing and gluing conventional rigid ducting after using this... 60% at least time saving
@@dave2166 Both flexi and rigid have advantages and disadvantages .. we tend to you slimline rigid as we mainly do new build flats and more often than not ceiling void space is at a premium, esp if it needs lagging due to condensation or a fire break is needed, the flexi I'm sure is great for house bashing like the lads showed in the video, it's a good product and i dare say i'll use it when the right job comes up
How would this work in a domestic installation for building regs? It’s often specified by building regs depts for 100mm fan for bathroom & 150mm for kitchen. I’m aware it’s due to flow rate, but with varying flow rates for different zones, how could use a single unit?
You need to read up on approved documents part F which specifies the types and more important flow rates of ventilation required for each type of room and the entire house.
Well,it is good system. But I was waiting for napkin test which shows the power of flowing in and out. Also, the big problem if I can say so, with this ventilation is water gathering by steam in the pipes. I did not saw any solution for it except the flexi pipe after fan not before system.
Interesting video! I watching the video from Spain and I have a question about the wood beams in which you put the conducts. How can I get info about the steel plates that conform the beams. I see this beams only in UK. Sorry for disturb and thanks in advance for your helping.
Good luck trying to find a installer in the UK that can install, wire and properly commission these units. Most electricians I contacted just scratch their heads on these units.
Great video as always. I like the simplicity of the system but alas I don’t deal with that stuff . 👍❤️thank you for another great video guy’s. Gaz or Gordon can give me a call please when you get five minutes to spare . I have a question but I don’t want to put it on social media as I don’t want it crap abuse that will come back to me
My experices of living with these mixed boxes is that the high humidy from bathrooms makes dust and dirt in the air extra sticky and just fks the fan and ductwork overtime unless cleaned at least every 6 months...
I’m about to start our new build and wanted something cheaper than Mvhr, which I’ve had before and gave no heat benefit. Will this system stop the requirement of window vents, as I’m building air tight. Also will it make the house cooler?
It will remove whatever air at whatever temperature from your home. If the heat loss isn't worth it for the ventilation benefits, simply run it less or turn it off.
We are using the envirovent wall fans for kitchen and bathroom, had them come and tell us about the installation. Wasn't impressed as we do a lot of like for like swaps and the envirovent fan spigot doesn't go flush with tge wall so you have to cut the ducting back . Right pain when it's plastered in soil pipe .
Needless to say that it is a must by regulations on every new home on every room from 2012 in mainland countries. The only difference is it saves energy by keeping it inside the house instead of just blowing out
You only insulate ducting if the are in a cold void such as a roof Within the building envelope you don't need to insulate. With fast track and mev there isn't the same issues as its a continuous running system so condensation doesn't form unlike a bathroom fan which can push moist air into a piece of roof duct and then switch off so trapping that air so it condenses inside
It must have some air flow taking condensation from the kitchen bathroom and not need insulated pipe work . I wish I seen this years ago this all that insulated ducting I have been wasting money on all these years.
@@Bigballs72 not about volume of air it's about the continuous flow of air... in a ceiling void ducting isn't insulated as its building envelope If this ducting goes onto a roof space then there's an insulation sleeve which slides over it keeping it snug. The greater issue is condensation forming on the outside...if air is moving all the time in the smooth bore of the fast track it doesn't get chance to condense.
@@dave2166 I didn’t realise the void between the ceiling and the floor was the same temperature has the room into venting. Especially with insulated plaster boards. Sorry your wrong insulation is needed. It will condense in ductwork with the slightest bit of difference in temperature and length of run. Great videos but your not always right.
Hi Jim, As dwellings are becoming more airtight, it is imperative that the correct ventilation system is installed. The MEV system is a continuous running system . This allows a more controlled background ventilation rate than you would have in a leaky dwelling with traditional extract. These systems need to be specified, set up and installed correctly in order to prevent issue in the future.
Regulations provide several different forms of ventilation. While this system is not as energy efficient as a whole house heat recovery system, they are more efficient and better for ventilation than traditional intermittent systems.
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LEARN MORE ABOUT VENTILATION SYSTEMS with this FREE CPD MODULE
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I did the 2 day domestic ventilation course at their HQ in Harrogate. It was very informative and a great group of people who work there.
Hi Davey, thanks for the comments and glad you managed to gain something from the course
Guys.....I must say, you are knocking out some great content. Stuff that is actually worth watching for us electricians! Keep it up and thanks! 👍🏻
Cheers - lots more in the pipe - the CPD which Sita along with this is work a half hour of your time.
@@efixx well worth doing it...
I believe there are also Heat Exchange versions of this system. Great for the modern (sealed up tight) homes. Thanks guys.
I had to finish a larger type installed by a builder and left it . It was very easy to finish off and works well 👍👍
How much does the builder charge to install that?
Hi guys, looks a good system.. a couple of questions; is there an insulated ducting for this system to install in cold spaces (lofts) to prevent condensation? Also, with regards to heat loss through continuous ventilation would this be an expensive way to ventilate the home. As there is no heat recovery built into this unit, would it not be constantly pulling valuable heat from the home ?
@@danielwood5334 My understanding is that whole house ventilation systems often use heat exchangers to get round this issue. Perhaps beyond the scope of this video as it takes a bit of explaining, but definitely a pertinent point.
I had a blast making this video with TheGT 👍🏻
I'm sure you blasted that khazi Gaz :)
Surely this system is not very energy efficient in the winter? Pulling warm air from inside the house and throwing it outside, from multiple rooms. Can it be wired to only come on when switched on from each of the rooms with a duct fitted? Or does it run 24/7?
Seems they are just promoting this product, not interested in the realities.
So don't run it in the winter. You are not obligated to run something in your house simply because it's there. You can simply run it only when doing activities that produce odours and deal with the heat loss, but otherwise leave it in the low setting or leave it off. You don't run your heat in the summer, right?
One of the other videos in this series strongly advises against using flexible ducting, this one highlights disadvantages with rigid ducting, although to be fair this green stuff although flexible, looks like a halfway house. I would be interested in thoughts/tests/comparisons on using this type of ducting with individual fans.
Would be interested to hear more about heat recovery systems. Single and/or multi room systems. There are a lot of cold damp houses in the U.K. and heat recovery might be a useful tech to help combat these issues.
Corrugated ductwork requires more power to move the same amount of air due to the higher pressure loss along the length. Fixed ductwork rather than flexible is always preferred for efficiency!
This is what is not explained in the video. The fan will be working harder and have a higher sfp meaning more running costs.
I can see something inside the ducting. I suspect it’s not fully corrugated on the inside. Hard to tell!
It’s smooth an the inside and not to be confused with flexible ducting.
@@efixx thank you for the correction efixx. Is it available to buy over the counter as a consumer I'd like to try some with my portable air conditioner, say 125 mm DIA
@@efixx 2:52 It does not look smooth?
I would love a video of MVHR!
Looks a neat system, everything is easy with web joists.
Why is it everyone makes a big thing about for rated down lights, yet nobody gives two hoots about cutting a 4" hole in the ceiling and installing a fan with no fire collar.
The only reason I can think is, the house is one fire compartment, and if that's the case technically we don't need to install fire rated down lights, a three storey house would be different, but the only place I could think fire rated down lights and a fire collar would be if they were being installed in a garage with a room above.
Apologies for going off topic, just an observation.
I'm sure the guys growing stuff , would love this green range lol
🤭
Trying the 300 this week!! thanks for the info and vid
Envirovent great fans. We had been using them for years. But they have gone down hill, I'm not sure what's happened but since the packaging has been rebranded we have had to go back to faulty units, not just 1 it was pretty much every unit. Never had any faulty products previously to this so my thought is that they may have changed manufacturing.
We have had to source another brand.
We would be interested in hearing more about why this is and what fans you are using. The changing of the branding was not inline with any manufacturing changes. There have been changes to some products over the years as technology evolves and regulations change. however, Envirovent pride them selves on a quality product nd service. Please contact our customer care team if you feel this is not the case.
@@larrysoper4785 thank you for your response. We had used envirovent for many years and never had an issue until these S & P new packaging appeared so not sure what has been changed but for some reason we seem have an issue with them. Inline fans especially (MV250/100T & MV160/100T) and a centrifugal wall mounted unit. The SIL100T are still in stock with the original packaging and so not experienced any issues with these as yet.
I have a new fan to replace a faulty one and this will be the 3rd replacement. The last 2 didn't want to work on fitting. I'm hoping this works this time. 🙏
Personally if I was going to the trouble of running ducts etc I’d want a ventilation system that included heat recovery.
That just pumps the air you spent money heating straight outside.
Yeah, sadly the building standards often let house installers get away with just these systems.
Wow are we still installing new ventilation systems for homes that don't include heat recovery. The extra cost on new build is minimal and it is a big saving on home heating. So this is fancy tubing on a 1960 design.
@@caterthun4853 my thoughts exactly. You’re already 90% of the way there with a MEV… two more ducts and you can easily have the same with heat recovery
@@edc1569 building regs are changing, in fact we've got a change next year as a stop off point before future homes standards in 25.....
Sadly ventilation is not sexy enough to warrant a house builder to fit more than they need to achieve compliance
@@edc1569 boggles the mind when today we are at a climate change summit! Not expecting Passivhaus house standards but in 2021 we should have more insulation, SOME solar, heat pump, heat recovery ventilation and a basic car charger in the regulations for new builds by now.
Is there a way to only pull air from the room where the humidity is, or is it detectable any humidity in any of the 3 rooms (example shown) and pull air from them all, potentially pulling warm bathroom air out even though no humidity detected ?
Hi Guy’s, Could you use this to move hot air, say from a south facing conservatory, to another part of the house that may be north facing. Slightly back to front I know but looks like it would work!
We will ask! - good idea
I already done this with bathroom extract fan from South facing conservatory. Works a treat in spring and autumn.
The issue might be how to get the ducting in a sympathetic and efficient manner from room to room. An inline fan as efixx showed recently would be more appropriate although every situation is unique
This is exactly the video I was looking for. Thank you. Now I am gonna research more on it. Trying to replace my existing Nuaire MEV-M+ which serves 2 bath and kitchen, but its malfunctions alot. I need to replace with something as powerful / efficient, if not more.
So can this not be installed in the loft? We are in the process of redoing all bathrooms in our house and they are all upstairs and the best location for this would be in the loft so that 1 unit can do the job instead of 3 separate fans. If that, then I assume we can’t use the green ducting as it will not be the same temperature and may cause condensation.. in that scenario, what ducting should we use? Insulated??
An insulated version of the ducting is available
Insulated ductings should be used outside of the envelope. Heat recovery equivalent would be recommended though which would then feed warm, clean air into the habitable spaces.
@@kieranmccreedy271 Thanks Kieran.. we are going to be looking at the heat recovery module instead of just ventilation...
@@rexgold101 👌🏻
Most centralised units are suitable for fitting in a loft space without the requirement for extra insulation. However, any ducting in an unheated area of a building (i.e. a loft space) does require insulation. With an MVHR system it is also important to insulate both ducts that run to/from atmosphere. The Domestic Ventilation Compliance guide provides some great information on install requirements for the different ventilation strategies assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/456656/domestic_ventilation_compliance_guide_2010.pdf
Nice system, worth considering for the future, i tend to fit MVHR's these days.. tip, use a double pole switch for running the boost and light switch.. tend to wire the lights in pvc t&e and the boost in lsf, saves confusion on the connections.. now for a few beers to destroy the mental image of Gaz sat on the khazi :)
Nice to see someone doing more than the minimum
Fast track ducting when designed as part of a mvhr system is a game changer. No contractor would willingly subject themselves to a week of more of screwing and gluing conventional rigid ducting after using this... 60% at least time saving
@@edc1569 Thanks buddy
@@dave2166 Both flexi and rigid have advantages and disadvantages .. we tend to you slimline rigid as we mainly do new build flats and more often than not ceiling void space is at a premium, esp if it needs lagging due to condensation or a fire break is needed, the flexi I'm sure is great for house bashing like the lads showed in the video, it's a good product and i dare say i'll use it when the right job comes up
@@thattoolguy9432 you can get oval section semi rigid.... ceiling voids are the bane of any ventilation designers life... rarely sufficient
How would this work in a domestic installation for building regs?
It’s often specified by building regs depts for 100mm fan for bathroom & 150mm for kitchen.
I’m aware it’s due to flow rate, but with varying flow rates for different zones, how could use a single unit?
You would use 2 defuser for the kitchen
You need to read up on approved documents part F which specifies the types and more important flow rates of ventilation required for each type of room and the entire house.
Incredible system - wow! Where can I get this in the US?
I wasnt thinking it's complicated I was thinking dam that's massive
Well,it is good system. But I was waiting for napkin test which shows the power of flowing in and out. Also, the big problem if I can say so, with this ventilation is water gathering by steam in the pipes. I did not saw any solution for it except the flexi pipe after fan not before system.
Interesting video! I watching the video from Spain and I have a question about the wood beams in which you put the conducts. How can I get info about the steel plates that conform the beams. I see this beams only in UK. Sorry for disturb and thanks in advance for your helping.
Great video chaps… although I am now scared for life seeing Gary on the John.
We know the name of a good councillor😂
Is there an installation that uses thiner pipes that I can use in a conduit???
A great system. I couldn't help thinking of Bundy10 flexicon on steroids.
Good luck trying to find a installer in the UK that can install, wire and properly commission these units. Most electricians I contacted just scratch their heads on these units.
Great video as always.
I like the simplicity of the system but alas I don’t deal with that stuff .
👍❤️thank you for another great video guy’s.
Gaz or Gordon can give me a call please when you get five minutes to spare . I have a question but I don’t want to put it on social media as I don’t want it crap abuse that will come back to me
My experices of living with these mixed boxes is that the high humidy from bathrooms makes dust and dirt in the air extra sticky and just fks the fan and ductwork overtime unless cleaned at least every 6 months...
How do you get fresh air in to replace what you are removing?
I’m about to start our new build and wanted something cheaper than Mvhr, which I’ve had before and gave no heat benefit. Will this system stop the requirement of window vents, as I’m building air tight. Also will it make the house cooler?
No you’ll still need a full MVHR if you are going for an airtight home. - we have a full CPD on the topic in production atm.
How would a system like this affect the overall warmth of a house considering it's constantly extracting air?
It will remove whatever air at whatever temperature from your home. If the heat loss isn't worth it for the ventilation benefits, simply run it less or turn it off.
Hello - does your team offer installation of this in a domestic property?
We are using the envirovent wall fans for kitchen and bathroom, had them come and tell us about the installation. Wasn't impressed as we do a lot of like for like swaps and the envirovent fan spigot doesn't go flush with tge wall so you have to cut the ducting back . Right pain when it's plastered in soil pipe .
Learned something new today! Thanks! :)
I am from the Philippines. Can i purchase this system?
What a great idea.
Was there two pipes going to that ceiling outlet?
Probably.... thats if you need to move higher volumes of air from one room without causing undue noise
No filter? How nasty will that fan be in a few years? Can it be disassembled easily?
Needless to say that it is a must by regulations on every new home on every room from 2012 in mainland countries. The only difference is it saves energy by keeping it inside the house instead of just blowing out
How to buy this vandilation fan I need this
You should have gone for a MVHR..
Today I Learned that this flex ducting have a very high resistance and only 1.5M of it should be used in whole installation .
"looks incredibly complicated" which part? : D the for pipes or the switch? haha.
6:02 will have to have my staycation in tap land spring
We’ll spotted - the new tapland health spa! 🤣🤣🤣
where can I buy the tubes etc?
How about putting one in a house that's already done then tell us how easy it is
What is the cost?
Why no insulation on ducting? There will be water build up at some point due to cooling!!
You only insulate ducting if the are in a cold void such as a roof
Within the building envelope you don't need to insulate. With fast track and mev there isn't the same issues as its a continuous running system so condensation doesn't form unlike a bathroom fan which can push moist air into a piece of roof duct and then switch off so trapping that air so it condenses inside
Great answer 😀
It must have some air flow taking condensation from the kitchen bathroom and not need insulated pipe work .
I wish I seen this years ago this all that insulated ducting I have been wasting money on all these years.
@@Bigballs72 not about volume of air it's about the continuous flow of air... in a ceiling void ducting isn't insulated as its building envelope
If this ducting goes onto a roof space then there's an insulation sleeve which slides over it keeping it snug. The greater issue is condensation forming on the outside...if air is moving all the time in the smooth bore of the fast track it doesn't get chance to condense.
@@dave2166 I didn’t realise the void between the ceiling and the floor was the same temperature has the room into venting.
Especially with insulated plaster boards. Sorry your wrong insulation is needed. It will condense in ductwork with the slightest bit of difference in temperature and length of run.
Great videos but your not always right.
where can I get the pvc tubes?
For systems and ducting contact Envirovent 01423 810810 for more information or a local wholesaler.
CO2 sensors? Did you mean to say CO sensors?
No Co2 is a issue heading your way - check out this video - ruclips.net/video/afnmefHrKlQ/видео.html
Can this system be used with a heat recovery unit?
I can't help feeling that building houses which need this is a bad idea. We will hear in 10+ years of all the problems sealed houses will have.
Hi Jim, As dwellings are becoming more airtight, it is imperative that the correct ventilation system is installed. The MEV system is a continuous running system . This allows a more controlled background ventilation rate than you would have in a leaky dwelling with traditional extract. These systems need to be specified, set up and installed correctly in order to prevent issue in the future.
Be good if boost was on remote.
Even the whole thing
I thought the idea was to reduce plastic usage.
I imagine it’s all recycled plastics, the problem with plastics is them going into landfill or even worse the ocean.
@@edc1569 I imagine a lot. 😁
Does this replace mvhr systems?
Corrugated pipe slows down the air flow. If you can fit smooth walled pipe the better.
But swept bends are more efficient than elbows.
@@ajones8699
True, but corrugation is a serious hindrance.
Good idea but it’s sucking all ur heating out of ur house
Not much use without a heat exchanger.
Shame it's not a heat recovery unit, all that wasted heat!
Do the regs there not forbid this type of unit.
Regulations provide several different forms of ventilation. While this system is not as energy efficient as a whole house heat recovery system, they are more efficient and better for ventilation than traditional intermittent systems.
the thing is, british houses aren't like their american counterparts and our walls and ceilings can't just fit random hoses
Extract anywhere apart from a bathroom, with no supply, is useless.
The fart button
Whole house fart fan. Needs more power
what a stupid product
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