Really interesting I’ve never seen this type of duct system. One benefit I assume is the ductwork (apart from the return) is in conditioned space so should help cool and heat well. Only thing I wonder is the noise and static pressure on the system. Let me know how it runs. 👍🏻
Reading multiple forums on this system - odd they didn't show the "calculations" that are require by Rheia to make sure the flow balancing is correct. Also static pressure generated by conventional systems over long runs. A higher velocity insulated system may have a better chance but if they are relying on this system and design around it from the get-go and then have to retrofit regular duct work after the fact this will be a nightmare to try to fix. Yeah the old HVAC guys aren't as familiar with these types of systems but the math points towards this not working very well or at all... especially for long runs which traditionally require LARGER ducts to get the pressures to the ends so the flow is there.
The math doesn't work out. This product was sold to national home builders directly, and its gaining popularity extremely fast, and I predict its going to implode as fast as its coming on to the market. Typically, I'm seeing 25-35 3" runs, and there must be lots of 2.5 to 3 ton applications in that range. Most HVAC guys would agree, on the supply side, the equivalent of a 15" or 16" round would deliver that 2.5 to 3 tons depending on how complex, long the supply and return air is, how much static is available after a filter, coil, furnace/Air handler has been designed into the system. The vents themselves are also very restrictive when compared to a typical vent you see available at even home depot (just looking at their shape). I get it, its about creating some velocity at the air exit. But the shape in both the round and thing wall vents is by its nature restrictive, a lot more than a typical 4x10 vent when compared to what the air volume its delivering. The big issue here, is the math, and static pressure, even running out a 16" equivalent trunkline, to 12, final 6" vents, keeping crossectional area constant in comparing 12, 6" vents, with with 12, 6" vents, that nets a 336 sq inches. These small 3" vents, are only 7 sq inches cross section. So, to keep crossectional volume similar, you would need 48 of these small 3" vents. If this company says its ok to have less vents than that, wow, its only going to perform worse, not better. Now, back to 12 vents, 6" size on a normal 3 ton application, 336 sq inches, that has a circumference of 216". That 336 sq inches of air is contacting 216 linear inches of ductwork as it passes through it. Static pressure is directly caused by the air interaction with surfaces. 48 of the small 3" vents, give you the same 336 cross section, except now that air through all 48 of those 3" vents is interacting with 432 linear inches. We are talking about double the surface area that the air has to contact with, its all friction, and thats assuming all things equal, we are comparing 6" home run lines just like these 3" lines are run. With a normal HVAC design, a single 16" trunk would apply here, and that helps even more the static pressure to be lower. As we know, static pressure isn't a linear relationship, nor is a blower curve. I'd love to know what Rheia recommends for a 3 ton setup on a small home, how many runs. I doubt its 48 lines, if its not, and its much less, the issues only compound. This is why so many people think this system is "high velocity" and it isn't. Its only the velocity and static pressure a normal furnace can handle. Max capability on the best variable speed furnaces is .8" static on heating, and 1.0" static available on cooling total. This is so so so so bad. a 3" duct (metal) running 30 cfm, has a friction rate of .28 inwg/100ft. A 6" duct running 100 cfm has a friction rate of .08 inwg/100ft. We are talking 350% higher friction rate. And thats compared to 6" home runs to every vent, which its widely frowned upon, because its one of the most restrictive ways to run a duct system, super inefficient labor wise, ineffective for packaging. This is just doubling down on a terrible installation method of 6" home runs, but in a result that is way worse that double. Closer to 4x worse. Critical thinking is gone. Packaging isn't even a win. Its just a dumbed down way to do hvac that takes the thought out of it to make things simple, but the impact on all things are going to be terrible. I understand, the market we serve is high end. I run about 50 guys, 10 Million a year revenue working on 150 Custon Estate homes a year that are all between values of 3 Million dollars, up to 100+ Million dollars each. But I didn't get to working on these homes over night. I have worked on all types of projects. Having 5 or 6 vents in a room where one would do it. What wall clutter. I'd love to know more. Anyone who has information they can post here, that would be great. For now, until someone can explain the math to be different, this brand Rheia, is missing its first name Dia. Its no different that the Aria vents that are out there. The math doesn't work.
Better be on the sheetrock police team , making sure they a dopey don’t put a screw thru the flex ! Please put up pictures of the return and the finish wall grills, would love to see eyeballs on the wall , even a cyclops on ceiling. Lol Seriously let’s see finish pictures. Ty 👍
![Felix "Unfair" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/Oswujxm2Ag0/mqdefault.jpg)
Definitely need to post your music playlist for your videos, great music and awesome video!
@stefan onnis thanks man! I don’t have a playlist I just pick out music from the app I use to edit my videos
Really interesting I’ve never seen this type of duct system. One benefit I assume is the ductwork (apart from the return) is in conditioned space so should help cool and heat well. Only thing I wonder is the noise and static pressure on the system. Let me know how it runs. 👍🏻
Amazing bro please make more videos we learn a lot from you ❤️
Reading multiple forums on this system - odd they didn't show the "calculations" that are require by Rheia to make sure the flow balancing is correct. Also static pressure generated by conventional systems over long runs. A higher velocity insulated system may have a better chance but if they are relying on this system and design around it from the get-go and then have to retrofit regular duct work after the fact this will be a nightmare to try to fix. Yeah the old HVAC guys aren't as familiar with these types of systems but the math points towards this not working very well or at all... especially for long runs which traditionally require LARGER ducts to get the pressures to the ends so the flow is there.
Good job man! Keep posting videos
@David Cruickshank thanks man will do!!
The math doesn't work out. This product was sold to national home builders directly, and its gaining popularity extremely fast, and I predict its going to implode as fast as its coming on to the market.
Typically, I'm seeing 25-35 3" runs, and there must be lots of 2.5 to 3 ton applications in that range. Most HVAC guys would agree, on the supply side, the equivalent of a 15" or 16" round would deliver that 2.5 to 3 tons depending on how complex, long the supply and return air is, how much static is available after a filter, coil, furnace/Air handler has been designed into the system. The vents themselves are also very restrictive when compared to a typical vent you see available at even home depot (just looking at their shape). I get it, its about creating some velocity at the air exit. But the shape in both the round and thing wall vents is by its nature restrictive, a lot more than a typical 4x10 vent when compared to what the air volume its delivering.
The big issue here, is the math, and static pressure, even running out a 16" equivalent trunkline, to 12, final 6" vents, keeping crossectional area constant in comparing 12, 6" vents, with with 12, 6" vents, that nets a 336 sq inches. These small 3" vents, are only 7 sq inches cross section. So, to keep crossectional volume similar, you would need 48 of these small 3" vents. If this company says its ok to have less vents than that, wow, its only going to perform worse, not better. Now, back to 12 vents, 6" size on a normal 3 ton application, 336 sq inches, that has a circumference of 216". That 336 sq inches of air is contacting 216 linear inches of ductwork as it passes through it. Static pressure is directly caused by the air interaction with surfaces. 48 of the small 3" vents, give you the same 336 cross section, except now that air through all 48 of those 3" vents is interacting with 432 linear inches.
We are talking about double the surface area that the air has to contact with, its all friction, and thats assuming all things equal, we are comparing 6" home run lines just like these 3" lines are run. With a normal HVAC design, a single 16" trunk would apply here, and that helps even more the static pressure to be lower.
As we know, static pressure isn't a linear relationship, nor is a blower curve. I'd love to know what Rheia recommends for a 3 ton setup on a small home, how many runs. I doubt its 48 lines, if its not, and its much less, the issues only compound. This is why so many people think this system is "high velocity" and it isn't. Its only the velocity and static pressure a normal furnace can handle. Max capability on the best variable speed furnaces is .8" static on heating, and 1.0" static available on cooling total.
This is so so so so bad.
a 3" duct (metal) running 30 cfm, has a friction rate of .28 inwg/100ft. A 6" duct running 100 cfm has a friction rate of .08 inwg/100ft. We are talking 350% higher friction rate. And thats compared to 6" home runs to every vent, which its widely frowned upon, because its one of the most restrictive ways to run a duct system, super inefficient labor wise, ineffective for packaging. This is just doubling down on a terrible installation method of 6" home runs, but in a result that is way worse that double. Closer to 4x worse.
Critical thinking is gone. Packaging isn't even a win. Its just a dumbed down way to do hvac that takes the thought out of it to make things simple, but the impact on all things are going to be terrible. I understand, the market we serve is high end. I run about 50 guys, 10 Million a year revenue working on 150 Custon Estate homes a year that are all between values of 3 Million dollars, up to 100+ Million dollars each. But I didn't get to working on these homes over night. I have worked on all types of projects. Having 5 or 6 vents in a room where one would do it. What wall clutter.
I'd love to know more. Anyone who has information they can post here, that would be great. For now, until someone can explain the math to be different, this brand Rheia, is missing its first name Dia. Its no different that the Aria vents that are out there. The math doesn't work.
What mechanical unit are you using with this duct system?
RHEIA, its a nice technology. :)
👍
So, no return for each room needed it?
Is it structurally safe to have all those big holes in the floors?
Who designed your duct work?
Dope no itchy insulation either
@justin Means yessir!!
We need more videos for types of furnces
Better be on the sheetrock police team , making sure they a dopey don’t put a screw thru the flex ! Please put up pictures of the return and the finish wall grills, would love to see eyeballs on the wall , even a cyclops on ceiling. Lol
Seriously let’s see finish pictures. Ty 👍
Static pressure is the first thing that comes to mind when seeing three inch supply ducts 🤔
This guy and his rapidly moving camera. Relax.
Hi velocity system, we quit using those years ago.
@Dwayne Renton I’m not sure if it’s considered a high velocity system.
Not high velocity. Low pressure system using standard equipment. 😏
Did 12 houses with that stuff.
@jose Chavez what do you think of it?
@@etbseui16 EZ Money
@@josechavez353 do you like it better than the normal system?
Your video making me dizzy.. this isn't a extreme games video.. it's not like you jumping off a cliff!!!!