On 2018-10-22, John Rumm wrote:

On 22/10/2018 09:43, tim... wrote:
Hi,

I have a property into which I am having a replacement (combi) CH boiler
fitted

Currently there is a basic wired thermostat in the hallway, at the end
of a less than (ascetically) ideal wiring run, though as I am moving the
boiler to an alternative location that will have to be replaced anyway

I understand that I can get a wireless thermostat/controller, but what
are pro/cons of this?

Pros:

no need for wiring.

You can move the stat about. (note that can also be a con if you move it
to somewhere already controlled by a TRV - you may just end up defeating
your boiler interlock)

Cons:
See last pro above, and
Batteries need replacing (although they will probably last several years)
May have connection problems of the transmitter and receiver are too far
apart.

Do the batteries run out unexpectedly and leave you without heating?
(or have to be replaced frequently)

They might do - but usually last years, and are commonly available types
(i.e. AAs)

IME they don't quite last a year but I may be replacing them
overcautiously whenever I notice the battery warning indicator on the
thermostat.