The glass is dual pane for maximum insulation and noise reduction values.

Because the panel is separate from the insert unit, the user who has a change in the size of his pet doesn't need to purchase an entire new pet door. He/she simply purchases a new insert with the appropriate size opening at considerably less expense.

Just as important as the opening, of course, is the "rise" dimension. The Pet 1 Panel includes a user adjustable rise design (under license from Patio Pacific Inc) which allows a given flap opening to accommodate dogs of varying heights. For example, a Jack Russell Terrier and a Dachshund may both be happy with a medium sized opening but only if the opening is positioned higher for the Jack Russell and low for the Dachshund.

At 18", the Pet 1 Product panel is relatively wide. Make sure you'll have room available to walk out yourself. Likewise, at 1¹/₂" thick, there may be some sliding glass door tracks too narrow for this panel. Best to check before buying. However, the manufacturer specifies it for vinyl tracks which is a significant advantage.

The installation method is unique and doesn't really fit the 'temporary' and 'semi-permanent' categories. On one hand, it does not require fastening in your track with screws for a stable installation. It just 'pops' in. But the gas shock system uses so much force that it's necessary to fasten a special handle on the adjustment panel which you then use to pull it down. That handle bolts in place; and, when you've finished installing the door, it is removed. You need to keep track of that handle as well as the tools and bolts used to install it.

Pet 1 Product Significant Design Features

For every other patio pet door the correct measurement is inside the track, very top to very bottom.

However, in measuring for the Pet 1 Product door, you should not measure into the track at top or bottom. Just measure between the tracks as shown below:

Do not measure inside the track
at top or bottom

The user adjustable rise offered in the Pet 1 Product patio panel means that for each size--small, medium and large--there are multiple "rise" dimensions available to the user.