
Originally Posted by
Thai Dhupp
How many showers / sinks is it servicing?
Kitchen, 3 showers, washing machine and a bath tub.

Originally Posted by
Thai Dhupp
do you ever run out of hot water?
Not yet with 100 litre. Daily use by 4. Larger boilers avalable if your usage more. Boiler located in storeroom. Upvc hot water pipe to all mixers. Plus for me is not having electrics hanging off the wall right next to where you're standing in water.
Your call but I'd go with the boiler first and after you get your garden in and have a good sunny spot for a ground mounted solar heater simply run hot water into the boiler.