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I purchased a few TRVs for my Drayton Wiser system as I previously only had one and it was great at keeping my office a good temperature, now I'm putting some more in but I've come across a problem that I hope someone can shed some light on..
My master bedroom has a radiator with no TRV on it, just a sorta old fashioned +/- but what I don't understand is that it's on both sides? (Picture attached) I've never actually turned this up or down so I don't understand what side I'd even use to do so. This also appears to be the same in my living room.
Basically I'm trying to understand why this is, how I can use my new TRV on it and how to actually install it to because it doesn't seem to fit. Thanks
