Mines was in the garage. Garage stank. Refit it went outside.
My previous rental it was round by the shed out side – that area stank so much so i was sure we had a leak and got a plumber to have a look
Are you thinking its less efficient as its out side ?
Absolutely no reason at all for them to smell. We have had oil fired boilers in 5 houses over the last 20 years and never had any smell unless there was an oil leak. Inside is better because the heat generated by the boiler while its working goes into the house, not heating up a shed. Also your pipe runs are shorter.
The trick with oil is to have a large tank, well insulated house and an efficient boiler. You can then buy the majority of the oil in the summer months when it is cheaper, and probably not that different to gas. Don’t know the actual numbers but I would guess that oil might be 20% more expensive than gas, so an extra £200 per year?
One comment about Muthill though is that you will struggle to get to Killin sometimes during the winter months if you have to use the Glen Quaich road