pprrff

Good to know, The ones I've been on so far did not have any (If I recall correctly when I looked them up after the flight they were from China)

Jimmie Jet

pmrowczynski

At least you're not flying Aeroflot!

Aeroflot (SU) between JFK and MOW is horrendous for me. I find myself wearing convertible pants now. The ones where you zip off the lower legging portion to convert it to a pair of shorts. The shoes come off and I wear a sports (athletic) shirt as an undershirt. Basically I'm dressing as if I'm going to the gym to workout! And I always pick a window seat as well, hoping for a bit of heat loss and keep the shade up.

Now this is only at cruise altitude. When we get ready to descend, everything comes back on and for some reason - it's cool enough. If we're departing on the tarmac (versus jetway) I'm still prepared with a stuff able down jacket. I don't know, maybe the passengers are used to it (the heat) but egads, it's horrendous!

For colder flights (usually shorter hauls between JFK and SFO) I'm prepared with a packable down blanket. Serves as a pillow (again, window seat but potentially exit row) or a means of staying warm.

karachi

my experience on AC's 787 to TLV a few wks ago was that it got really warm, esp on seat 5A. my guess is because it is the last one and air does not circulate properly near it ? my blanket remained un-opened on that flight.

Stranger

Ah, stereotypes.

My wife always complains hotel rooms are too hot. If she could, she would lower the thermostat to 16C or so. I don't like it too hot either, but I am not as radical as she is. 19-20 is perfectly fine. 23-24 is too hot.

I usually cannot handle the duvet. On a recent FRA-YYC, I slept without it; was just a bit cold initially, but I suspect they eventually raised the temperature just a bit and it was fine.

Stranger

True that pre-787s used bleed air. However describing this as waste heat is a misconception. That air is warmer than outside air because it was compressed, which takes power. Also, whether bleed air needs being cooled or further heated up is not necessarily obvious. Which also affect the energy balance.

Anyway, the 787 and I imagine same generation ABs no longer use bleed air for good economic reasons. Having to do with ensuring a more predictable engine operation among other things.

All She Wrote

You are right the air conditioning on a 787 is electrically powered as opposed to the conventional bleed air system - The cabin environment on the 787 is considered to be amongst the best around due to the lower cabin altitude and higher air humidity. It is also fresh air as opposed to air which is primarily recycled, although a small amount is let through the extract valves on other aircraft. I'd imagine this situation was just caused the the FAs setting the temperature too high, clue being when they said they "turned it down" to 23 degrees. I'm not sure if it works the same in the 787 but on the A320 we can set the inlet temperature for the FWD and AFT cabin from the flight deck, then the FAs can control zone temperature from the FAP within a set deviation from the temperature set by the flight deck (+/- 3C).

gingerlucy

Same. Hotel a/c never goes low enough. Windows that don't open are the one thing I cannot stand in hotels.

At home our thermostat is set to around 16C with an absolute maximum of 18C in the evenings, then the heating is turned off a little while before bedtime and the bedroom windows are open every night without fail even when it is below freezing outside. Usually when we wake up in the mornings the bedroom temperature is showing as 12-14C which is totally fine. Luckily my husband and I agree on this. It isn't that we are putting up with the cold - I don't like being cold as such, but we are used to those temperatures so it doesn't feel "cold" to us. Trying to sleep in a warm room is horrible.

For this reason I don't usually assume I will sleep on long haul flights, and treat it as a nice bonus if I do.

Plumber

Ours is at 20 in the day and evening and then we drop it to 15C for sleeptime.

I caanot sleep comfortably at 24C--- even 22Cis pushing it for me.

Many hotels in parts of Asia dont have a/c on during the winter- I often have to have a fan brought to my room to move the warmer stuffy air around.

That all translates into I much prefer a cooler cabin for sleeping.

eracerblue

BlondeBomber

Some guidance based on what most people like. There is no happy medium but there will be a range that accommodates the majority. Sorry 15 seems too low and 25 too high.

https://en.wikipedia.org/wiki/Thermal_comfort

"Most people will feel comfortable at room temperature, colloquially a range of temperatures around 20 to 22 °C (68 to 72 °F),[2] but this may vary greatly between individuals and depending on factors such as activity level, clothing, and humidity."

tecate55

Temperature matters as well as ventilation. Anything blowing at you that's cooler than your skin temperature will have a cooling effect. "Warm" blowing air can cool more than cool stagnant air.

Anyone try any USB cooling fans that are on a gooseneck wire? AC's USB ports seem like in a good position to plug one in.

Like this: https://www.ebay.ca/itm/Portable-Fle...H/183059163156 or this:
If you use one and aren't in a window seat, I suspect a picture of you will end up in threads here about annoying people.