When buying heaters require special attention

Possible for most people when buying heaters only value the quality of that good quality is the best, while ignoring its other aspects, in fact, need special attention to other aspects of the time of purchase , for example:
First, species
We buy when you can use according to their environment to a reasonable choice of species, such as Dianreyouting species have low surface temperature and thermal performance and good security, but it also has raised slow and bulky shortcomings, as well Fan portable gas room heater small size and easy to move, but it is very high in terms of consumption, so that also requires special attention to the selection of species.
Second, after-sales
Although at the time of purchase gas heater indoor businesses will use no problem saying so on, but how to do when problems arise, and this is the time of purchase that require special attention, the best choice for some of the big manufacturers, they are also for the service They are in place.