Hi ctcc, if it is for recreation then 8m is fine if space is a constraint, though if you are wanting a lap pool primarily for fitness then ideally a 12m+ is probably the smallest you would want to go. If you are working with a confined space and fitness is a primary goal you may want to consider a swim spa. There is also some more information on lap pools in one of our blogs on custom pools: http://www.destinationliving.com.au/destination-living/creating-the-perfect-custom-pool/ Regards The Destination Living Team

Yes - there are these amazing options to have an 'electric pool cover' with a slat arrangement that allows you to virtually walk on it. Do a google search...'pool covers electric'... I've no idea on how much they cost... Here's some pics. Not sure if irregular shapes make this too challenging... Our pool experience... We are needing to change a few things with our pool already - wish we had paid more attention to the pipes and filtration... (Having to potentially move them as they are too shallow and in 'awkward spot'... Extra $ and I'm so worried it may cause issues for us... Even the location of the concrete slab for the pump... Wish we had thought about overall picture... If I was buying a car for $70k, I would have done more research, but somehow we got carried away with idea that we could have a pool for summer, and yet reality is that it's ready for the 'next summer'... Budget plan (original) was around $30-40k, but I guess it's like building a house... Plus it's all a big learning experience...

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/

We have Paramount in floor pool cleaner with hedge/plants around pool. Infloor pool cleaner is awesome. I vacuum pool 2-3 times a year.