Dedicated oil burner for garden room

Would not check the mobile home small diesel heaters.

Vevor do some good value models. Easy install, low fuel burn and good output. Grand stuff for occasional use.

There's people heating garden workshops bigger than yours with these. Very safe and without the need for radiator installs. You can add a radiator to the exhaust portion so it acts as a heat sink.

Just a thought because the rooms not that big and you said there was a running water questionable and you didn't want a tank.

Risking it ? Their portable diesel burners used on campers for over a decade. It's not really a risky click thing tbh.

Ah yes. That's entirely fair! 👍

No, the flame is kept in a burn-chamber and isn't vented into the room. Fins bring the heat out from the burn-chamber to the room air which is forced by a fan. There is an exhaust via a steel flex pipe which gets routed outside. I think that they are typically all room-sealed, so they pull in the air which they burn.

I think the oil would be a good job, but you are getting into a lot of cost for such a small area. Between tank, boiler, pipework, radiators you are into possibly €6k there.

What about some of the modern electric radiators with on board room stat? Like these.

https://www.atc.ie/?gad_source=1&gclid=Cj0KCQiAz8GuBhCxARIsAOpzk8xLBSYwH0zqX-MSa_zxS2oAfK6iL-HqITBC99CdDNgtwenkvUoF_2QaAoddEALw_wcB

A2A Heat Pump - Mini Split , Have a look at this guy , Heating an apartment in the UK for less thana tenner a month https://www.youtube.com/watch?v=2LBI7SpbJs0