Product review (5 stars): Mounting Template will help a lot / Manual needs to be improved
Our over the range Microwave died and we decided to replace with a powerful range hood as we do a lot of stir fry cooking and large amount of smoke is generated.  Having read the reviews both positive and negative here, I was in 2 minds to buy this product.  After thinking it over for a long time, I finally made the purchase.  The price was right and the product was promptly shipped.  I inspected the box soon as it arrived and I did not see any significant damage to the box.  I proceeded to open the box carefully.  As I started taking the parts out, I noticed that the bag of fasteners was open and all the screws were scattered at the bottom.  There are lots of screws provided with this range hood and you end up with lots of extras.  I assume it is for different ways to mount this product.  I went to Home Depot to look for the metal clamp to secure the flexible duct which comes with the unit to the range hood outlet.  The clamps are not provided with the unit.  Alternatively you could use 3M Metal tape to secure them. The outlet is 8" which at Home Depot I was told was unusual for homes and I was not able to find the clamps.  I first plugged the range hood in and ran it at different settings to make sure there was no issue.  It ran fine at all the settings and so I proceeded with the installation.  I drew a template using cardboard so I could mark the corresponding mounting locations on the bottom of my cabinet and pre-drilled all the screw mounting holes.  The 30" range hood is heavy.  Installation is definitely a 2 person or 3 person job though depending on the mounting location and how much space you get around it to get a good hold.  You may also need to employ a cabinet lift jack or a vehicle floor jack.  We had to go through and try different ways to get it in there but finally we have been able to mount it.  Some of the videos on Youtube will help.  The manual which comes with the unit is woefully inadequate.  It needs clearer pictures and a complete rewrite.  The access to the screw holes is tricky.  Also if space permits, it would be best to put the screws in first and then lining up the screw head with the large holes, lift the hood in and slide it back in place and then tighten the screws.  If your home is not setup to vent outside and you are not too handy, you may need to use professional help.