Condensation vs Nuaire Drimaster

[Trustmeimadoctor]

these are my measurements now

[Henry Chinaski]

B'stard Child said:

I think that's exactly what TMIAD is saying

At 8am my loft temp was 16.2 C and Humidity was 73.9

Right now my loft temp is 27.4 and humidity is 59.2

Both readings are a lot higher than I would normally expect

Rooms downstairs are normally mid to late 50's currently all my humidity loggers are reporting high 60's low 70's

Ok, many thanks for your answers, I'll head to the loft and switch it back on...we were experimenting with just the dehumidifier last couple of days.

[markiii]

Mine have been much higher last couple of weeks as well

[NickXX]

First cold day since I installed the PIV today and I’ve got some condensation on the lower inch of the bedroom windows.

The heating hasn’t been on and the house has been about 20c still. Would it be worth upping the fan speed?

[remedy]

Are the windows uncovered so the air can circulate?
The wife closed our shutters last night on 2 of the windows and those have a bit of internal condensation at the bottom.
The ones where the shutters were open are fine.

Loads of condensation on the outside though. Perfect!

And I woke up to that lovely, subtle, crisp air movement this morning. The second best bit of a PIV, IMO.

[ben5575]

I’ve got mine blasting away at 5 atm. I have a very cold hall and not ‘feeling’ any improvement.

Might be because the outlet is in the ceiling near the bathroom which tends to have the windows open and obviously the extract flicking on and off. I’m assuming the air will take the path of least resistance and flow out of there rather than circulating everywhere else?

[bobski1]

First cold say of winter into single digits, work up to windows like this:



Wondering if it could be due to the large amounts of rain from yesterday but no idea where this moisture in the air is coming from. Seems to be getting worse each year, any advice?

[Hereward]

Is that a bedroom window? Breathing as you sleep will cause that, especially if the bed is close to the windows.

I think human breath emits about 500ml of water every 24 hours?

A hot shower will also chuck a lot of moisture into the air. Open the window and / or run the extractor for an hour afterwards.

Unless it's absurdly cold outside keep some windows open on the crack to get some ventilation.

[dmsims]

We (had) hopefully past tense a real issue with one bedroom and condensation (plus the subsequent mould)

It's a bedroom bay with flat lead roof that juts out from the main house structure which has curtains



I already have Home Assistant so put an Aqara Zigbee temp and Humidity sensor on the internal ledge

I have a slim convector heater ready (but not used yet)



2 80mm PWM fans to blow air along the internal ledges

A dehumidifier set at 65% (I did try 70% but too high)

Even with no one in the room last night humidity reached 80% (I then switched the fans on)

[dmsims]

ETA

Got the bathroom covered as well

[NickXX]

remedy said:

Are the windows uncovered so the air can circulate?
The wife closed our shutters last night on 2 of the windows and those have a bit of internal condensation at the bottom.
The ones where the shutters were open are fine.

Loads of condensation on the outside though. Perfect!

And I woke up to that lovely, subtle, crisp air movement this morning. The second best bit of a PIV, IMO.

We use black-out blinds and curtains on both which might not help- but they do have vents above them which are open.

[gashart]

Henry Chinaski said:

B'stard Child said:

I think that's exactly what TMIAD is saying

At 8am my loft temp was 16.2 C and Humidity was 73.9

Right now my loft temp is 27.4 and humidity is 59.2

Both readings are a lot higher than I would normally expect

Rooms downstairs are normally mid to late 50's currently all my humidity loggers are reporting high 60's low 70's

Ok, many thanks for your answers, I'll head to the loft and switch it back on...we were experimenting with just the dehumidifier last couple of days.

Drimaster user here, the last couple of weeks or even months the humidity levels in the house have been generally hovering around 70%, even brought a dehumidifier, which even though needed emptying everyday, wasn't bringing the house humidity down much.

Then also noticed that the outside and therefore loft humidity has been up over 70%, sometimes 80+%

Then over this weekend the house humidity has dropped back down to mid 50's% and so has the outside humidity

So I'm a bit confused, if we have high outside humidity then the so is the loft and then thats pumped into the house?

[Trustmeimadoctor]

Yes but the th humidity is relative outside air at 80%and 9c is alot drier than inside air at 21c and 80%

[B'stard Child]

gashart said:

Henry Chinaski said:

B'stard Child said:

I think that's exactly what TMIAD is saying

At 8am my loft temp was 16.2 C and Humidity was 73.9

Right now my loft temp is 27.4 and humidity is 59.2

Both readings are a lot higher than I would normally expect

Rooms downstairs are normally mid to late 50's currently all my humidity loggers are reporting high 60's low 70's

Ok, many thanks for your answers, I'll head to the loft and switch it back on...we were experimenting with just the dehumidifier last couple of days.

Drimaster user here, the last couple of weeks or even months the humidity levels in the house have been generally hovering around 70%, even brought a dehumidifier, which even though needed emptying everyday, wasn't bringing the house humidity down much.

Then also noticed that the outside and therefore loft humidity has been up over 70%, sometimes 80+%

Then over this weekend the house humidity has dropped back down to mid 50's% and so has the outside humidity

So I'm a bit confused, if we have high outside humidity then the so is the loft and then thats pumped into the house?

Cold air has less ability to hold water - so even when it's a high humidity level and cold when it's in the loft when it's then introduced into the house it gets warmed and it's humidity drops rapidly *

* I think (I'm sure someone will put me right)

[Shrugging for victory]

We had a PIV installed last year and new windows installed this year. The bedroom windows had around an inch of condensation on them this morning. I'm guessing part of the problem is a combination of a) I think that the water table is quite high where we live b) at night time the windows are shut and covered, and now there are no leaky seals etc on the windows, the water vapour has to go somewhere. I do make sure that the windows are opened during the day and I have a dehumidifier running when we dry clothes that can't be tumble dried.

I've just accepted that window wiping is now part of the morning tasks before opening them. I'm not 100% sure if the PIV does help reducethe condensation, maybe I'll turn it off and see the difference, but it has improved the air quality in the house.

[NickXX]

The bedrooms in my house didn't get above 61% overnight last night, so I think the PIV is working its magic now. Would usually get up into mid 70s last winter during colder evenings.

I cut down the ducting yesterday so it was the correct length, which has probably helped too.

[dmsims]

Our bedroom window was bone dry this morning, now occupied and curtains drawn overnight

Still trying to find the relationship that will cause condensation

|https://thumbsnap.com/VvAeHdL1

Shrugging for victory said:

We had a PIV installed last year and new windows installed this year. The bedroom windows had around an inch of condensation on them this morning. I'm guessing part of the problem is a combination of a) I think that the water table is quite high where we live b) at night time the windows are shut and covered, and now there are no leaky seals etc on the windows, the water vapour has to go somewhere. I do make sure that the windows are opened during the day and I have a dehumidifier running when we dry clothes that can't be tumble dried.

I've just accepted that window wiping is now part of the morning tasks before opening them. I'm not 100% sure if the PIV does help reducethe condensation, maybe I'll turn it off and see the difference, but it has improved the air quality in the house.

[NickXX]

That does still seem quite high. Have you had the heating on at all over the last few days?

[gashart]

gashart said:

Henry Chinaski said:

B'stard Child said:

I think that's exactly what TMIAD is saying

At 8am my loft temp was 16.2 C and Humidity was 73.9

Right now my loft temp is 27.4 and humidity is 59.2

Both readings are a lot higher than I would normally expect

Rooms downstairs are normally mid to late 50's currently all my humidity loggers are reporting high 60's low 70's

Ok, many thanks for your answers, I'll head to the loft and switch it back on...we were experimenting with just the dehumidifier last couple of days.

Drimaster user here, the last couple of weeks or even months the humidity levels in the house have been generally hovering around 70%, even brought a dehumidifier, which even though needed emptying everyday, wasn't bringing the house humidity down much.

Then also noticed that the outside and therefore loft humidity has been up over 70%, sometimes 80+%

Then over this weekend the house humidity has dropped back down to mid 50's% and so has the outside humidity

So I'm a bit confused, if we have high outside humidity then the so is the loft and then thats pumped into the house?

So now the house is generally sitting at 80% humidity, fan on speed 4 and temp averaging 18c, very very confused ??

[B'stard Child]

gashart said:

So now the house is generally sitting at 80% humidity, fan on speed 4 and temp averaging 18c, very very confused ??

What are you reading the temp and humidity on? Is the device calibrated in any way?

My loft right now is 83.1 % humidity and 17.4 Deg C

My house is 67.2 humidity and 19.2 Deg C

It's slowly crept up all day but it's been wet on and off