In a two storey house, never put the heater on the top level if the bottom level also needs to be heated. When the wood heater is on the bottom level, the hot air will rise up stairwells and heat up both areas.
Never suggest installing a wood heater next to a stairwell as the hot air will naturally rise up the stairs and not circulate through the bottom floor.
A flue will expand and contract. Therefore there is the possibility that it can make noise.
Never install a wood heater that is too big for the actual home or office size. This will result in consistently setting and burning the wood heater on the lower setting and for this reason, the wood heater will not be working efficiently. This will cause blackened glass and will increase smoke output and cause the flue to block. This can also work the other way as a wood heater capacity can never be increased, but can be shut down.
The fan in a wood heater should not be turned on until the firebox has heated up. If turned on beforehand, the fan will keep the firebox cool and therefore emit more smoke.
The fan can help distribute heat up to 3 meters from the wood heater.
Finding out the general direction of prevailing winds. This can help you determine where a wood heater should be located as the natural draft will push hot air through the house.