".. to keep in fridge.."
uhh.. boiling water is just a waste of energy and money... water
from the tap is treated with trace chlorine which kills the germs
and stuff... but not enough to cause problems to the body at all..
besides, chlorine in water makes it hypochloric acid... which
becomes hydrochloric acid... and that's just a trace amount of
it..
before anyone says anything about hydrochloric acid, it's what our
stomach comes up with to digest food...
the only thing i can see with boiling water is to introduce more
bits of your kettle into the water... maybe iron or worse,
aluminium...
best drink the water from the tap.. or if still not convinced about
the chlorine, just leave it in a glass bottle with the top off for
a day... all of it will go away..