How Tall Can I Extend the Glass Patio Pet Door Using Extensions?

Modified on Tue, 10 Mar at 8:50 AM

Short Answer

The V2 Glass Patio Pet Door fits sliding doors 1960–2120 mm (77.2–83.5 inches) tall without extensions. With extension combinations, it can reach up to 2710 mm (106.7 inches) in total height.

How Extensions Work

The V2 Glass Patio Pet Door (released June 2025 onwards) can be extended using three optional extension types:

Top Aluminium Extension – adds 160 mm (6.3 inches)
Middle Glass Extension – adds 400 mm (15.7 inches)
Bottom Riser Extension – adds 50 mm (2.0 inches)

These extensions can be combined to increase the overall height of the pet door to suit taller sliding door openings. The installation manual also confirms that extensions can be installed at the top, middle, or bottom of the unit depending on the configuration required.

V2 Glass Patio Pet Door Height Combinations

Combination	Extensions Used	Total Height Range
No Extensions	—	1960–2120 mm (77.2–83.5 in)
1	1 × Top Extension (+160 mm / 6.3 in)	2120–2280 mm (83.5–89.8 in)
2	2 × Top Extensions (+320 mm / 12.6 in)	2280–2440 mm (89.8–96.1 in)
3	1 × Top Extension (+160 mm / 6.3 in) + 1 × Middle Extension (+400 mm / 15.7 in)	2520–2680 mm (99.2–105.5 in)
4	1 × Top Extension (+160 mm / 6.3 in) + 1 × Middle Extension (+400 mm / 15.7 in) + 1 × Bottom Riser (+50 mm / 2.0 in)	2570–2710 mm (101.2–106.7 in)
5	1 × Middle Extension (+400 mm / 15.7 in)	2360–2520 mm (92.9–99.2 in)
6	1 × Bottom Riser (+50 mm / 2.0 in)	2010–2170 mm (79.1–85.4 in)

Bottom Riser – Raised Entry Height

Installing the Bottom Riser Extension raises the height of the pet door entry (step-over height). This is often preferred for larger or taller dogs.

Glass Patio Pet Door Size	Step Height Without Riser	Step Height With Riser
Small	50 mm	100 mm (2.0 → 3.9 in)
Medium	100 mm	150 mm (3.9 → 5.9 in
Large	150 mm	200 mm (5.9 → 7.9 in)

Important Considerations

Only one Middle Glass Extension can be used at a time.
Up to two Top Extensions can be installed.
Only one Bottom Riser Extension can be installed.
Always measure your sliding door opening height before purchasing extensions.

Because sliding door openings vary between homes, customers should always measure their door frame and confirm compatibility before purchasing accessories.

Helpful Tip

If your door opening falls between extension ranges, installing the Bottom Riser can help fine-tune the fit while also raising the pet entry height for larger dogs.

Glass Patio Pet Door Installation Guide
https://support.hakunapets.com/support/solutions/articles/51000498792

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