I ran my generator while parked at a house I was working on with my son. My wife and I spent the night in MH. In the earlier hours of the morning I began to smell exhaust inside. This is the first time I've run generator for a long period while MH is parked. The generator I'm sure you well know, is located left rear below bedroom. I'm pretty sure there are no exhaust leaks but being parked could there be a way fumes can enter MH. It seems generator enclosure is somewhat separate from next compartment which is all water etc connections. I do not have this problem when driving with generator running for A/C. I really can't remember the alarm going off but I replaced it anyway. This really concerns me when my granchildren are with us. Is there some monitor that can be purchased to check all this out or should I take it to a shop? Not sure there is a reputable repair shop near my town of Henderson, Texas. There is one RV dealer about 30 or so miles but haven't had the best luck the times I've used them. Any suggestions is greatly welcomed. By the way I was running the bedroom air on fan only to help cut the noise level of generator.