Some months ago I purchased a Hottop programmable and now use it all the time in preference to my Gene Café. One thing I did not like about the Hottop is the difficulty of extracting the fumes when roasting indoors.
With the Gene the air flow is very gentle and exhausts in a more or less vertical direction. With the machine sited under a cooker extractor hood it is easy to extract the fumes.
The air flowrate from the Hottop is much greater and exhausts horizontally. With the machine sited under a cooker hood the fumes “escape” under adjacent kitchen cabinets making it impossible to extract them.
I have made a very simple adapter to turn the exhaust flow into a vertical direction which allows it to be extracted by a cooker hood. This works very well making indoor roasting much more practical. If anyone wants to give this a try the following photos should give you the idea.