I'm fitting a vertical flue to it as per the fitting advice/instructions, but I've just read in an advert online that I only need to fit a flue if drawing off more than one tap it must be flued to the outside air. I'm only fitting it to the hot tap in the bathroom, so do i need to flue it? Common sense tells me to, though it is not something I will be using a lot.
The model is a Rinnai REU 58e Caravan/Motorhome Gas Water Heater
The flue kit I have for it is this one
Just to reiterate:
Do I fit the flue? I do have a mushroom type roof vent just above the boiler's location already (I was planning on using this hole for the flue.)
Also, if I do what type of sealant shall I use - needs to be heat proof and seal the storm collar (part in bottom right of picture) to the roof (using self tappers or rivets too).
