@ Luke Buckle yep that’s the one. Has 1000w/200w switchable. I just put an oil heater in there 2 days ago to trial and room was toasty in under 5mibs WITH A non instant oil heater so a fan type wouldn’t take long. Also consider the heat lamps are 250w so 1000w total if all 4 are on. They feel like they are frying your head off from above when blazing all 4 lamps so depends on what “feel” you want also. As someone mentioned, let alone the cost of lamp replacement. Having been in lighting industry they wouldn’t last super long either (perhaps newer ultra violet do but their also pricier again)... I’m no better either!

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watchedpoppy, here's something about heat pumps designed for cold temperatures. Note, these are reverse cycled air conditioners (air-to-air), not pool heat pumps (air-to-water). I don't know how heat pumps stack up. It's an American site, so FYI -13F equals -25C. http://www.mitsubishicomfort.com/benefits/hyper-heating On a side note, temperature is just the product of the motion of atoms & molecules (kinetic energy). These are in motion all the way down to zero Kelvin (-273C). So although it may feel cold outside, there's still energy available in the site, although heat pumps do become much less efficient when it's cold (the difference in input & output temperatures is important). One thing that has made heat pumps very inefficient in the past is that the condensing coil would ice up at around zero C. This would have to be thawed out with a plain old electric element (COP of 1). Greatly reducing the overall COP in temperatures around our below zero C. But the modern heat pumps, which use the CO2 compressors Luxury Home Heating has talked about don't have an electric element to thaw them out, greatly increasing their efficiency. As for the noise issues. Some modern heat pumps (but not all) are very quiet. So just pay close attention to the decibels they produce, listed on their spec sheets. FYI, here's a good read. Though it doesn't mention solar PV, which would be advantageous for a heat pump. https://www.pooledenergy.com/blog/choosing-a-pool-heater-what-are-the-relative-performances-of-solar-gas-electric-pool-heaters/

Hi dreamer, thanks for the suggestion. Im wondering though, how do I treat the junction between the vanity and the fixed panel of the shower screen? The diagram I uploaded above leaves out the shower head, so there will in fact be a shower-over-bath in the above scenario, with a fixed panel adjacent the bath. If I have the vanity hard up against the bath, I'll need to tile the side of the vanity, no?