Truma combi boiler in Bailey Approach

We have a Bailey Approach 625, it has the new Truma combi boiler installed, do you have this type of heater in your Motorhome/caravan? how do you get on with it.  We have found it very quiet and does heat the van great, the only thing is we have used the van 3 times over the winter months and of course we have needed the heating on overnight. The bed that the heater is located under does get very warm so much so that we have had to open the flap under the bed to allow the excess heat to escape. We have turned the heating down to around 18-20c over night but the bed still gets hot, we sleep them as singles so one of us gets a hot bed while the other is cold. We have contacted Bailey but they say no one else has commented on this, but we have spoken to 2 others with Bailey motorhomes (different models) who also say they find the beds get hot. Anyone else have this problem? if so how do you combat it and what is it like in the summer months?