Over the colder months it would be nice to have a heat source in the garage/workshop for the odd days I spend a few hours or so in there, the garage is single skin, single glazed, no insulation, an ice box in winter, I'm thinking of buying a crappy stove off Marketplace, making up a chimney (using proper chimney components) that vents through the wall, getting Hetas approval is completely cost prohibitive but really what are the risks? I will be in there and active, rather than sat on a sofa falling asleep and likely to succumb to the effects of carbon monoxide poisoning, realistically what are the risks? I accept my home insurance could potentially be effected but likely only an issue is the event of some kind of disaster, which I would suppose is extremely unlikely and fingers crossed I'll not live through. Anyway I digress, a carbon monoxide alarm would be installed. Any thoughts? I am expecting a tirade!