Sleeping Ultra Hot

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Ultimate Geek

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#3113016 7-Aug-2023 21:33

It is of course vitally important to keep partner up to temperature.

Do you have a duvet cover stuffed with a duvet? How about say a Super King or California King size duvet cover but stuffed with only a single-size duvet on partner's side and no duvet on your side?

sleepy

334 posts

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#3113283 8-Aug-2023 13:17

A couple of things to check and try

Man made fibre tends to heat you up and often Mattress protectors branded as cotton are stuffed with polyester fibre.

High thread count sheet do not breathe a 350/400 thread count cotton sheet is recommended

Silk Duvets are great at regulating temperature https://silksensation.co.nz/

For mattress protectors https://www.protectabed.co.nz/pages/our-products

Signature series was the one i always recommend

Hope this helps

neb

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#3113532 8-Aug-2023 21:08

mkissin:
Thought about potentially just getting two singles and pushing them together?

This layout is pretty much the norm in a lot of Europe. The concept of having a singe unified mattress where you can shake each other awake all night long when one of you turns over is... weird.

Paul1977

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#3114097 10-Aug-2023 12:47

Thanks for all the replies. Unfortunately I've tried all the usual suggestions (in that we were already doing them).

375TC percale weave Egyptian cotton sheets
Mattress protector 100% cotton outer and fill (230GSM), and removing mattress protector entirely made no discernable difference that I could tell.
Duvet is 100% wool inner and 100% cotton outer
Duvet cover 100% cotton

Mattress itself is 100% certified organic latex, with a 100% wool quilting layer, under a bamboo & cotton cover.

The thing with the duvet is that I don't feel hot on top, just underneath where I'm in contact with the mattress. I've tried with a much lighter duvet on my side of the bed but just ended up cold on top, but still too hot underneath.

I'm somewhat regretting not getting an innersprung, but have heard great things about latex and it felt fine in store. Before we upsized to a super king innersprung a number of years ago we had a queens size Tempur for quite a while and I didn't find that uncomfortably warm at the time, so I figured latex would be fine since it's meant to be more breathable than synthetic foams. Maybe I've just become more sensitive to heat since then.

And, like I said, partner is perfectly happy with the new mattress so far for both comfort and temperature.

Getting scientific, I stuck a temperature probe between my skin and the mattress on the hottest part of my torso and the highest it got was 36C which is (according to Wikipedia) on the higher side, but still normal. So buggered if I know why it feels so hot to me.

Anyway, the active cooling pad I ordered will hopefully arrive today or tomorrow so I'm looking forward to trying it.

SepticSceptic

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#3114389 10-Aug-2023 23:43

You're not going to bed fully clothed, are you?

Just covering the bases, you know, just in case ..
:-)

MarkM536

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#3114390 11-Aug-2023 00:39

I added a temp and humidity sensor into my room and it logs into Home Assistant.

From the past year, I have found I tend to have a bad night sleep if the humidity is very high. Temperature in summer compared to Winter is typically similar.

Sometimes I wake up hot if I have not had enough water to drink before bed and the humidity is high, this tends to feel like a congested headache in the morning.

I use a fan to circulate air around the room all-year round and have the window open in summer.

Eva888

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#3114392 11-Aug-2023 00:45

36.6 is normal average body temperature so your 36 sounds normal towards the cool side. I find feather duvets better than wool as they are light and don’t overheat plus depending on the type you can shake the feathers towards the bottom.

In practical Sweden each person has their own single duvet on the shared bed. It’s awful to make and generally they fold one side of the duvet under. Never looks tidy made up. Ikea there always show their beds made this way.

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eracode

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#3114393 11-Aug-2023 01:50

neb:
mkissin:

Thought about potentially just getting two singles and pushing them together?

This layout is pretty much the norm in a lot of Europe. The concept of having a singe unified mattress where you can shake each other awake all night long when one of you turns over is... weird.

Yep. Not quite the same as two separate single beds pushed together but after experiencing the Euro system recently in Germany, we have gone to two separate single duvets on our king bed. Works well and no disturbance from partner movement of the one large duvet. Our mattress transmits pretty much zero movement.

I agree it doesn’t look quite as neat when the bed is made - but people rarely see our bed anyway. Practicality overrules aesthetics for us.

Sometimes I just sit and think. Other times I just sit.

cddt

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#3114441 11-Aug-2023 10:14

neb:

This layout is pretty much the norm in a lot of Europe. The concept of having a singe unified mattress where you can shake each other awake all night long when one of you turns over is... weird.

I lived in Europe for a few years and quickly came to like the concept, but am still trying to convince my wife to try separate single duvets. Fortunately our mattress does not transmit any movement at all.

Paul1977

5043 posts

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#3114650 11-Aug-2023 13:14

SepticSceptic:
You're not going to bed fully clothed, are you?

Just covering the bases, you know, just in case ..
:-)

Just my puffer jacket, but that wouldn't be a problem would it?

Paul1977

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#3114653 11-Aug-2023 13:17

Eva888: 36.6 is normal average body temperature so your 36 sounds normal towards the cool side. I find feather duvets better than wool as they are light and don’t overheat plus depending on the type you can shake the feathers towards the bottom.

In practical Sweden each person has their own single duvet on the shared bed. It’s awful to make and generally they fold one side of the duvet under. Never looks tidy made up. Ikea there always show their beds made this way.

I was talking skin temperature, not core temperature.

Wikipedia:

Normal human skin temperature on the trunk of the body varies between 33.5 and 36.9 °C

tweake

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#3114700 11-Aug-2023 15:35

MarkM536:

I added a temp and humidity sensor into my room and it logs into Home Assistant.

From the past year, I have found I tend to have a bad night sleep if the humidity is very high. Temperature in summer compared to Winter is typically similar.

Sometimes I wake up hot if I have not had enough water to drink before bed and the humidity is high, this tends to feel like a congested headache in the morning.

I use a fan to circulate air around the room all-year round and have the window open in summer.

people are typically more sensitive to humidity than temperature.

the catch 22 of having a window open in summer, is you may have higher humidity coming into the room through the open window. tho it depends on location etc.

Paul1977

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#3115747 14-Aug-2023 15:54

OK, three nights on the cooling pad and so far would rate 7/10.

They recommend setting it between 31-36C, the theory being that's still cool enough to bring your temperature down since body core is 37ish. That might work if for me if the entire pad was that temperature, but it's not. It's 12 lengths of tubing 8cm apart which covers only a small percentage of the total surface of the pad, so to be effective (for me anyway) I had to set it much colder.

The tubing obviously has to be rigid enough that it won't collapse under a persons weight, so you can feel it. To mitigate this as much as possible I chose to place it under a 230gsm cotton mattress protector, rather than directly under the sheet (which is the recommendation). This had a two-fold benefit of placing an additional comfort layer between me and the tubing, and also more evenly distributing the cooler temperature (when placed directly under the sheet I could kind of feel the twelve cold lines running vertically up the bed, but couldn't when under the mattress protector). Having it under the thicker mattress protector probably means I need to set the temperature cooler, but the improvement is worth it.

The most annoying thing is the heat exchanger unit won't fit under my bed or bedside table to keep it out of the way during the day as it's a little too tall. Those with more clearance under the bed would fair better than me in this regard.

I suspect during Summer the heat exchanger may struggle to achieve the colder water temperature I like unless we use aircon to keep the bedroom around 20C or below at night, but I can test that then.

Pros:

Performs as advertised, keeps me cool all night when nothing else would.

Cons:

Can be a bit noisy depending on how hard it has to work, about the same as a desk/pedestal fan (speed self adjusts to whatever it requires). Doesn't bother us as it's like white noise, but could be a turn off for others.
Can feel the tubing but, as described above, this can me mitigated a great deal.
Unit too tall to slide under a low bed frame during the day (but it has safety valves, so can be disconnected from the pad and stored separately if desired without water going everywhere)

It's early days, but for me, the one major Pro outweighs all the Cons.

Paul1977

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#3116173 15-Aug-2023 13:39

Even under the mattress protector the tubing is still a little uncomfortable. I stuck an additional 500gsm wool quilted duvet I had spare on top of that of that as an additional underlay between the pad and sheet, that makes 730gsm of cotton and wool between me and the cooling pad now. Unsurprisingly it doesn't feel as cool to lie on, but it still kept me from overheating all night and was a lot more comfortable. I put this over the entire mattress to kept from having one side looking too high, and partner had no complaints after sleeping with the extra wool layer on her uncooled side.

If it continues to work well this way I might spring for a proper wool underlay, but the fitted sheet seems to hold the wool duvet in place securely so I'm in no rush to spend more money if I don't have to.

mudguard

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#3116328 15-Aug-2023 16:46

Paul1977:

I suspect during Summer the heat exchanger may struggle to achieve the colder water temperature I like unless we use aircon to keep the bedroom around 20C or below at night, but I can test that then.

I missed this earlier on, but if you have aircon, could you not leave that on instead? We have ours on cooling at 18C all night, all year (Auckland) as I run a bit hot. Might mean a thicker duvet for your partner but for me it's been bliss. So much so if we sleep somewhere else I can struggle if the room isn't cool enough.

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