Good with most DIY and electrical but plumbing is not really my forte. Recently refurbished my upstairs first floor bedroom/office 3.35 metres x 3.85 metres and height of 2.65 metres. Used BTU calculators online but they're giving me varied results. Will this radiator be suitable for the room: https://www.screwfix.com/p/acova-cl...n-radiator-600-x-628mm-volcanic-2701btu/55853 -Living room below (heated) -Exterior solid brick wall 3.35m by 2.65m with double glazed window (0.85m wide x 1.67m high) -Insulation put between wood floor joists and in ceiling (loft bedroom above) -Previous radiator was standard white approx 1.25 metres wide x 0.6m high Also after the plumber (or heating engineer ??) fits the radiator and tests, can I remove it straight after to paint behind and fit flooring and skirting boards and fit it back on myslef? Will I need to flush the system after I do this? Heard something like this and really not sure what it is sorry.