Reviews about Sylvania air conditioners are mixed. Reviews highlight the useful panel design and lightweight design, but they also note problems with using the air conditioner in a one-hose system.
Amazon.com has a five-star review and a one-star review for the Sylvania 12,000 BTU Energy Star Portable three in one Air Conditioner Dehumidifier Fan SYL-12PE as of October 2015. The five-star review states that the product takes the heavy lifting out of air conditioning and is lightweight, making it easy to transport the appliance and store it out-of-season. It also cools rooms well, and it has a timer to start or stop itself, states the review.
The one-star review claims that the air conditioner has a bad one-hose design. When the air conditioner sucks air out of a room, it causes negative air pressure in the house and causes the hot outside air to infiltrate into the house from anywhere possible. This means that as it cools one room, it also causes warm outside air to be sucked into the house. The reviewer suggests that the air conditioner is difficult to mount on windows with sills.
Small-PortableAirConditioner.org states that most reviews of Sylvania air conditioners suggest it works best in a two-hose system. This product also has an advantage over other air conditioners in that it can be used as a dehumidifier.