Why no? Biopropane is fully renewable from biomass but on the other hand people think heating with electricity is somehow cleaner than other methods. Well, electricity production in Europe is not very clean at the moment and not will be (and can't be) renewable-based unless wind and solar conditions change drastically. Large-scale geothermal production is a pipe dream within our lifetimes. So while most homes in Europe are already connected to a pipeline we are demolishing that and figuring out from scratch how to heat drafty homes with heat pumps. I'm just saying maybe, we shouldn't throw out 50+ years of boiler knowledge just like that.