7 year old house. Ice bits in joinery of master bedroom main window. Minor condensation on smaller window but no ice.
No heating in bedroom over night (apart from electric blanket!). Windows closed. No heating on anywhere else over night either.
Will a dehumidifier deal to this?
House is small 101m2 including garrage. HRV has been suggested? How much does that cost?
Hex 390 - I guess it's a similar system to HRV?
Advice appreciated. Thank you.
wine-o-clock,
May 28, 1:00am
why is there no overnight heat-is that throughout the whole house?
26copper,
May 28, 1:33am
There is a heat pump (and underfloor heating). But when we go to bed, we turn all the heating off. The heatpump is only used in the lounge/dining area (door closed to hallway) and then it is turned off at bedtime.
tweake,
May 28, 1:37am
are we talking ice between the panes of double glazing? if so window seals have failed. replace window.
if its ice on the inside of the house, on the house side of the window then there can be a couple of things. one is what is the humidity in the house? how are you ventilating the house? windows can work okish tho ventilation system is better. of the top of my head hex390 is a balanced ventilation system which is the best type of system. tho i suggest looking at cleanair system (avonindusties? in chch).
however the other thing at play here is nz poor performing homes and in typical kiwi fashion lack of heating. if the bed room is properly heated no need for electric blanket. proper heating should mean less moisture and warmers window that ice does not form on it.
first thing i recommend is go get a few temp/humidity gauges (they are really cheap) and put them in various rooms. get an idea what the situation is before spending lots of money.
annie17111,
May 28, 1:37am
We don't have double glazing but the reason we had ice inside our windows was lack of heating. We have a heat pump going all night to take over once the fire goes out and keeps our whole house warm. Our house is 120sqm and use a heat transfer system to move the warm air around. House is nice and toasty all night.
tweake,
May 28, 1:41am
to add, thats cleanaire by avonelectric in chch. the difference with them is they have an aluminium heat exchanger which works better in low temp climates than the plastic ones most other crowds have.
wine-o-clock,
May 28, 1:55am
when u turn your heating back on in the morning it will be running full tit to get the house back up to temperature again
lythande1,
May 28, 2:31am
Insulation, double glazing etc all do not warm a house. You still need a heat source.
harm_less,
May 28, 2:33am
Does the joinery have thermal breaks? If not you're conducting the cold straight in which of course will freeze any resident humidity.
hazelnut2,
May 28, 2:41am
Exactamundo!
I thought long and hard about how to cover existing aluminium with something to prevent water/ice forming on the smooth metal inside the house.
Research led me to A4 sized sheets of self-adhesive felt online (usa).
Chopped it up to fit, learned somethings about how to cut/place it during my experiment and Voila! NO freezing cold air falling on my head from the frames of our retro-double-glazed windows above our bed! NO icy window frames either! YAY!
hazelnut2,
May 28, 2:43am
Correct!
tweake,
May 28, 2:55am
good point. i missed that they mention its on the joinery.
tweake,
May 28, 2:57am
full length curtains should help a lot with that issue of cold air falling down on you off the window.
hazelnut2,
May 28, 3:08am
Can't have full length curtains. Heavy bedhead attached to wall, bed below window. no where else for bed to move to apart from into room, but then there would be nothing to stop the pillows from falling off the bed! lol
Problem is solved with the frames being covered in felt.
jkp58,
May 29, 4:13am
take temperture of room should be at least 18 degrees if not simple fix leave the heating on keep door open its 2021 not 1930s. Small house easy to heat. Leave the heat pump on 24 /7. Lots of Kiwis dont no how to keep house warm
wine-o-clock,
May 29, 5:19am
Agree, especially at -5°. Keep it on 'heat' and the fan on 'auto', and the vanes pointed down. It will ramp down once the temp is reached
jmma,
May 29, 5:35am
Some people know how to spell THE lol :oP
tweake,
May 29, 5:38am
of course the reason its prohibitive is that kiwis build low performing homes. the govt is looking at fixing that. so hopefully in the future you can buy a decent home that keeps the heat in, is cheap to heat and you don't need electric blankets etc. the big bonus is heating helps keep houses dry. no mold, no ice on windows etc.
mazalinas,
May 29, 6:20am
Dehumidifiers are good but in sub zero temperatures you'd need a desiccant dehumidifier - they put out a little heat as well. They're more effective and work at lower temperatures than compressor models therefore they're better for damp houses. Briscoes have a Goldair one but you could probably find one cheaper.
tygertung,
May 29, 6:24am
Just use hot water bottle. 18 degrees is way too hot for a bedroom.
tweake,
May 29, 7:06am
dehumidifiers work inside the house not outside. compressor models work fine at normal room temps. heating helps drive moisture out. desiccant dehumidifier cost more to run as they have a resistance heater in them. however the humidity levels down south where probably quite low anyway and using a dehumidifier may make it to low.
the problem is most likely cold frames due to lack of insulation rather than excessive moisture.
tweake,
May 29, 7:10am
do you measure the bedroom temps? what do you do during summer and its 30 degrees inside?
this whole 18 is to hot thing is just yet another excuse for people to not heat their homes. yet every year we hear about mold issues because people don't heat their home.
hazelnut2,
May 29, 7:35am
Or clean them! Keep the place dusted and dry and the mould won't have a chance to grow!
tegretol,
May 29, 7:46am
Correct. Leave it on overnight, even at 18 degrees.
elect70,
May 29, 9:08am
Isuspect poor quality double glazing no thermal break or not sealed properly & moisture is freezing inside the panes
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