My brother has a eko 40 installed inside a 40 by 60 shop with radiant heat and spray foam isulation throughout. On four ocassions in the last week when the room temp was satisfied the boiler reached 210 and ran the E2 code. At this point I have not found any reason for this and am looking for some ideas. I have a eko40 and have been burning for 2 years with no problems like this.