Hi, I have recently bought a UK spec DS-2DE4220IW-D. I was surprised to hear a fan permanently running, removing the back cover as you would to insert a micro SD card reveals a small fan with a plug and 2 wire lead so obviously not speed controlled. This makes enough noise to be heard when reasonably close to the camera although being outside this is not much of an issue.
However I want to buy an indoor camera, a through ceiling type preferably and have been looking at the DS-2DE4220AE3, this fits the bill well for me as just the dome shows through the ceiling. The supplier says this also has a fan constantly running, he says "it is not obtrusive" I am not so sure, worried that it may vibrate the ceiling and amplify the sound.
It would be great to hear peoples opinions of why are fans necessary? especially in the cool UK. Does the outside air circulate into the camera? How long should the lifespan of a constantly fast spinning fan be? As one of these cameras will be mostly in unoccupied premises I am concerned that apart from the noise it could be a fire risk.
However I want to buy an indoor camera, a through ceiling type preferably and have been looking at the DS-2DE4220AE3, this fits the bill well for me as just the dome shows through the ceiling. The supplier says this also has a fan constantly running, he says "it is not obtrusive" I am not so sure, worried that it may vibrate the ceiling and amplify the sound.
It would be great to hear peoples opinions of why are fans necessary? especially in the cool UK. Does the outside air circulate into the camera? How long should the lifespan of a constantly fast spinning fan be? As one of these cameras will be mostly in unoccupied premises I am concerned that apart from the noise it could be a fire risk.
