I want to get something to generate some heat, so that we can sit out in our garden drinking wine in the evenings.... Our garden isn't south-facing so by about 4pm we don't have any more sun, so can get a bit chilly. I was thinking of a chiminea or firepit, rather than a patio heater, as OH reckons they use a lot of gas or electricity. I just wondered if anyone had any thoughts on what works well...