Hoimeline and QC breakers aren't interchangable. Two pole breakers now cost around forty bucks.
Well I got back to the cottage today. I replaced the breaker with a new one. Ran the heater for over an hour and breaker did not trip. Also, while it did get slightly warm, it was nowhere near as warm as the old breaker was getting. Fingers crossed that the problem is solved. Will be here through tomorrow so fingers crossed. Thanks again folks!