Flying Snail
Established Member
- Joined
- 12 Dec 2006
- Messages
- 2,047
166 Turbo's have air-con so the windows should be locked shut and only opened for emergency ventilation or in the event the air-con doesn't work.
165's don't have air-con hence why they are fitted with hopper style windows.
Unfortunately people open the windows on the 166's which puts extra strain on the air-con and results in a number of failures. Bear in mind in a warm saloon, with a large number of bodies giving off heat, every time the doors open at a stop letting in more warm air, the interior is not going to be fridge like no matter how good the air-con is.
I have read and heard that sort of thing about A/C units malfunctioning because of being stressed due to open windows and such but it is total rubbish. While opening windows on hot days will reduce or even nullify the effectiveness of working A/C systems it will not cause them to break.
A/C units have no problem in running all day continuously on full, in fact it is less damaging to most of them then continual on/off cycles.
In my experience it is unlikely for people to go around opening multiple windows when the A/C is properly functioning in the first place. They will usually only start opening windows in response to uncomfortably high temperatures, of course there will always be the odd individual who will open windows no matter what but if lots of windows are open it is going to be because of non-functioning A/C not the other way round.
If the systems are not able to deal with crowds of warm bodies and regular opening of doors then they are not fit for purpose and need to be repaired or replaced with better units.
Many of the units being praised in previous posts such as Southern Electrostars will be at least as busy and have more frequent stops than 166 units but their systems are able to cope with that and still keep the interior to comfortable temperatures.
