What i said was " i think they will do upto about 5 radiators , plus hot water ".
I wasn't giving a quote moley , just tryng to help . It would also vary dependant on what type of wood was being burnt , oak , ash , pine etc etc , also what type of coal , how much draw the chimney had , how windy it was .
With the car and caravan you didn't mention whether the car was petrol or deisel , 4x4 or 2 wheel drive , or if the caravan was single or twin axle ? , or if the main use would be on motorway , a or b roads .
Also how many people would be in the car , and how much do they weigh ?
Sometimes you just don't need that much information , lol , you research that yourself .