Anyone used MVHR floor vents?

[Alan Ambrose]

... and which ones did you use?

[Nickfromwales]

13 minutes ago, Alan Ambrose said:

... and which ones did you use?

https://www.ventilationland.co.uk/en_GB/p/ubbink-air-excellent-35sc-floor-grille-metal-white/9079/?gad_source=1&gad_campaignid=19924996771&gbraid=0AAAAAB0qKPDjHUZDh0lNdENfmtPQWtgAw&gclid=Cj0KCQjw953DBhCyARIsANhIZoahCChrTIG36mWPN1kSwPwP0sYxJBVdTQSq_cUyC602wwIIDmcRvbEaAqUqEALw_wcB

 

and 

 

https://www.ventilationland.co.uk/en_GB/p/ubbink-air-excellent-35sc-grille-adapter/8481/

 

Can prob be found cheaper at Air-Haus https://air-haus.com/

[Alan Ambrose]

Nice, thanks. Assume they worked OK?

[Stu789]

Anyone know if it would it be possible / have experience putting these & the associated AE35 ducting in a raft foundation floor?

Planning an open kitchen-diner with vaulted dining room at the end of a bungalow and need MVHR feed-in at the far end of dining room to match with an extract over the kitchen sink.

MVHR expert I spoke with said ducts in floors are used from time to time for vaulted rooms but we didn't talk about floor makeup.

An alternative is route the AE35 ducting in the vaulted roof service void (which requires SV to be at least 50mm) but the grille adapter is then far too deep (287mm) for the SV.

[JohnMo]

3 minutes ago, Stu789 said:

and need MVHR feed-in at the far end of dining room to match with an extract over the kitchen sink.

Do you actually need a feed in the dining area, does your dining area have a door to elsewhere in the house? Or a vertical wall connected to an accessible area in the existing house?

[Nickfromwales]

Nothing stopping both being in the ceilings? Going into the lower insulation layer over a B&B floor is feasible, as long as the duct is say over at least 25mm of insulation, and the duct is pre insulated. 
 

Just a lot of pain for not much gain, and I’d defo do everything in my power to avoid a vent in the floor tbh. 

[Stu789]

24 minutes ago, JohnMo said:

Do you actually need a feed in the dining area, does your dining area have a door to elsewhere in the house? Or a vertical wall connected to an accessible area in the existing house?

Dining room will be at end of the building, only connected to the kitchen.

[Stu789]

13 minutes ago, Nickfromwales said:

...I’d defo do everything in my power to avoid a vent in the floor tbh. 

I'm of the same view as long as it doesn't make the service void massive.  Thx

[JohnMo]

 

6 minutes ago, Stu789 said:

Dining room will be at end of the building, only connected to the kitchen.

Have you looked at coanda effect supply terminals? They look like this and move air across the ceiling about 4 to 5m, before coming down. Maybe easier than floor ducts.

 

[Nickfromwales]

1 hour ago, Stu789 said:

I'm of the same view as long as it doesn't make the service void massive.  Thx

You can use a lower profile rectangular duct, referred to as ‘oval’. 
 

I use it when we’re stuck for service space and because I always try to get the services absorbed into the fabric of each of my clients projects.  
 

 

I used it above, as we wanted the ceilings to be flat all the way to the wall. You can see the adaptors to convert round to oval, and the reason is that oval doesn’t give brilliant flow rates compared to round, so I try to minimise the amount of oval in a circuit.

 

If you wanted to run a long distance, you can simply do two runs of oval which will perform better than one run of round, so there’s ways around any problem and folk pay me to find these solutions. 👍. 
 

Do try to avoid the floor ducts, and if you share pics of where you need to get to/from I’ll try to offer some suggestions for you. 

[S2D2]

4 hours ago, Nickfromwales said:

You can see the adaptors to convert round to oval, and the reason is that oval doesn’t give brilliant flow rates compared to round

Which brand do you recommend for this and do they have a flow rate calculator to check if multiple oval runs are required?

 

I'm about to install my system but running into issues with the drop to downstairs, the easiest route is down a partition wall with a rather inconvenient 72mm gap...

[Nickfromwales]

2 hours ago, S2D2 said:

Which brand do you recommend for this and do they have a flow rate calculator to check if multiple oval runs are required?

 

I'm about to install my system but running into issues with the drop to downstairs, the easiest route is down a partition wall with a rather inconvenient 72mm gap...

The oval is your friend here, unless you can add a 25x50mm batten and beef the wali thickness up?

 

I've always bought from CVC Systems, who now shift boxes via Air-Haus.com, if you're looking to buy and self-install.

[Nickfromwales]

9 hours ago, Alan Ambrose said:

Nice, thanks. Assume they worked OK?

Air came out of the fresh, and left via the extract, so yes lol.

 

It was an attic room, 3rd storey up in a PH, so a fresh alone wouldn't have done much up there tbh, so I altered the design to allow fresh in and stale out, and afaic it was doing the job nicely. Now way to get ducts up the walls to the ceiling so went with these.

[Nickfromwales]

3 minutes ago, Nickfromwales said:

and do they have a flow rate calculator to check if multiple oval runs are required

If you speak to them (CVC) they will assist with design etc and calculate flow rates and sense check it all for you before you place an order.

 

TBH I just use my gut when sizing and numbering duct runs/type of duct/size etc, and I've been on the dot with all of the so far, as in when the systems have been commissioned downstream by CVC they have all passed with flying colours.

[Alan Ambrose]

>>> Which brand do you recommend for this

 

That bright green stuff in the image is Ubbink.

[Nickfromwales]

10 minutes ago, Alan Ambrose said:

>>> Which brand do you recommend for this

 

That bright green stuff in the image is Ubbink.

What he said...