Air Vents to be inserted into multiple rooms in the house

p to the e · 23-09-2021 01:08PM #1

Please remove if I'm in the wrong place. We've recently moved into a mid terraced house that is approximately 100 years old and the engineers report had previously stated that some air vents would need to be installed. Recently with the weather getting colder I've noticed a lot of condensation on the inside of the windows so want to get some air vents installed.

I originally thought it would be a case of using a kango hammer and just throw a few holes in the wall but now it seems to be more to it. Can anyone advise on what my options are? Are there regulations to follow? I've also heard about some mechanical device within the vent that pre-treats the air. Does such a thing exist?

p to the e · 27-09-2021 01:01PM

Can this be moved to the correct place if wrong? Thanks

Effects · 27-09-2021 01:05PM

I certainly wouldn't go at it with a kango!

You can use a core drill for something like this, but if you don't know what you are doing, you might be better hiring someone like holemasters to do it for you.

p to the e · 27-09-2021 03:34PM

Thanks for the reply. I've educated myself a bit more about Heat Recovery Ventilation and am wondering if this would be suitable. I think I need to test for air tightness within the house first. Is there any recommendations for providers in the Cork area or somewhere I can look?

Effects · 29-09-2021 11:08AM

A 100 year old house wouldn't be suitable for a heat recovery system without major work.

zg3409 · 29-09-2021 11:18AM

What is the BER? Can the existing windows be locked slightly open to act as a vent or do the windows have a vent flap that can be used? Typically in a house with no vents you might leave all windows slightly open which will act similar to a vent.

In terms of putting vents on walls, you might want to consider external wall insulation at the same time, and possibly new windows, drilling or making holes will destroy the entire room with dust, including into closed presses. It's a major job and every room might need redecoration.

Water on inside of double glazing is common, particularly if cold morning and curtains or blinds closed. It's not ideal, you may also find water on inside walls. Vents or open windows will reduce chance of mold and damp forming. It typically gets worse if heating is on. Leaving internal doors open helps with air flow and make sure bathroom window is open during showers and after showers.

MicktheMan · 29-09-2021 02:58PM

https://www.boards.ie/discussion/comment/117945944#Comment_117945944

There are several other options for appropriate ventilation between "hole in the wall" and MVHR. For example cMEV or DCV.

An air tightness test is generally a good place to start when considering which system may be best suited.

Send me a pm if you need more info on service providers in the Cork area.

MicktheMan · 29-09-2021 03:00PM

https://www.boards.ie/discussion/comment/117953294#Comment_117953294

Much of the older housing stock can be a lot tighter than you think!

It would depend very much on how said house was originally constructed / renovated etc.

Effects · 29-09-2021 05:29PM

Really? I find that a little hard to believe.

And apart from making the house air tight, there's still a lot of work to install the ducting.

p to the e · 30-09-2021 12:18PM

https://www.boards.ie/discussion/comment/117954505#Comment_117954505

Thanks for that. I'll have a look at your suggestions. In my opinion I'd consider the house fairly airtight but I'd leave it to the professionals.

coffeyt · 30-09-2021 12:42PM

Have you considered a PIV system even as a cost effective short time measure. I have a 90 year old property with no vents and had the same issue with condensation due to lack of ventilation.

I installed a drimaster unit last year and has sorted the issue completely.

MicktheMan · 30-09-2021 03:23PM

https://www.boards.ie/discussion/comment/117958608#Comment_117958608

IMO, cMEV is a better solution than PIV because of the reduced risk of a damp structure (you are not driving moisture laden air out through gaps & cracks in your (cool) structure).

Yellow_Fern · 27-10-2021 03:34PM

https://www.boards.ie/discussion/comment/117955245#Comment_117955245

If a house has no tongue and groove ceilings, no external wall dry wall, no dormers, and no casement windows airtightness can be pretty good but as you ducting will a challenging if the house has more than one floor.

06-11-2021 09:38PM

I got a hole bored this week by a guy who had the proper tools.

160 mm hole done in 30 minutes

Air Vents to be inserted into multiple rooms in the house

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