On 15/02/2017 11:58, Tricky Dicky wrote:
I don't yet have any direct experience, but I've been researching it
with a view to installing a Hive system in my holiday flat. It would
have the advantage for me that, when I visit the flat in the winter (I'm
there now) I could turn on the heating remotely a few hours before
arriving rather than coming into a very cold place and having to heat it
from scratch. Since I have a stored hot water system, I could turn that
on remotely, too, but that's less important.
I already have a wireless programmable stat and, in theory, I could use
its holiday mode to turn the heating on just before my next planned
visit - but the problem with that is that my plans sometimes change!
As far as I can see, it's pretty simple to install. The only wiring you
need to do is to connect the receiver to your boiler and/or motorised
valves, depending on your system configuration. If you understand your
system well enough to install a wireless thermostat, you certainly
shouldn't have any trouble with installing a Hive receiver. If you're
lucky, you may have to do virtually no wiring. If you currently have a
programmer/timer which uses an industry-standard wall-plate, the Hive
receiver may plug into the existing wall plate in place of the old
programmer - with the only wiring necessary being to link out any
existing room stat. But you'd need to identify all the wires, of course
in order to confirm that.
The other part of the installation involves connecting the hub to a
spare port on your internet router, and providing it with a mains supply.
The thermostat unit, with its knob, buttons and display screen is
wireless, but is intended to hang on a wall. If you want to move it from
room to room, you can buy a stand for it - at an iniquitous price of
nearly 30 quid. I think I would make my own stand!
You are probably aware that the current model is the Hive 2 and that it
comes in two versions - heating only or heating plus hot water. Screwfix
have recently been selling the earlier version off for about 50 quid -
don't know whether they still have any. The old version is functionally
similar, except that the thermostat unit is much less sexy. Its hub also
has the disadvantage that it may not recover from a power cut - making
it useless if you are relying on remote access. This is because, when
the hub is turned on, it expects an internet connection to be there, and
gives up if there isn't one. After a power cut, it's likely to look for
a connection before the router has finished re-booting. The later hubs -
supplied with Hive 2 - are programmed to make multiple attempts to
connect to the internet and thus shouldn't suffer from this problem.
If you buy the self-install version, there are no ongoing costs. Access
to the app and to the remote server are free. I am assured by Hive that
they will provide free "lifetime" support. This slightly begs the
question as to whose lifetime, but they assure me that it is an ongoing
thing, and not just until that model is no longer sold.
My other concern is future-proofing. The hive is simply a switching
device. If you have a modulating boiler and want to be able to control
flow temperature, it can't do that. Hive are being a bit cagey about
whether they plan to add that capability - for obvious commercial
reasons, I guess. My boiler is pretty basic - so I don't need any
modulation control at present, but I may do in future if and when I
replace the boiler.
AIUI, the Nest already has the ability to control modulation - but its
other functions seem too clever by half to me, and I would would want to
maintain more control over the system than it appears to allow.
Is it worth having? I guess that depends on how important remote control
is to you. If you know when you're going to be in and out and away from
home, a programmable stat with a holiday mode is probably adequate - but
if your plans are flexible and you want to be able to come home to a
warm house at unpredictable times without using energy unnecessarily,
then it could come into its own.
I have had a lengthy dialogue with Hive - via the Screwfix site - to try
to bottom out some of these issues. If you go to
http://www.screwfix.com/p/hive-active-heating-hot-water-thermostat/5215j
and click on 'View all Q & A' you can see my questions and their answers.
--
Cheers,
Roger
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