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Endura Flap

The roots of Endura Flap Pet Doors go back to the year 1976.  It was a time of change and celebration.  The average cost of gas was 59 cents a gallon, bell bottoms and disco were all the rage, Apple Computer was founded and the US was celebrating its Bicentennial.

Endura Flap Pet Doors’ parent company Patio Pacific was incorporated and started selling a new pet door style.  It was a panel for sliding glass doors with an adjustable height to fit varying sizes of sliding glass doors.  A mail order catalog business was created that started selling the panel and other brands’ pet doors and replacement parts.

Fast forward to 1991 and under the stewardship of Alan Lethers, the original Thermo Panel was introduced.  It was the world’s first dual pane, insulated-glass panel pet door.  The Thermo Panel was followed by the Quick Panel that had a spring load height adjustment design making installation easy to install and remove.

In 1997, Alan had the foresight to purchase and create  He combined the mail order business and internet business to learn what customers wanted and needed in a pet door.  Leaping forward five years Alan teamed up with Scott Ganaja, a talented mechanical engineer, to design a new, improved height adjustment piece that was incorporated into the Thermo Panel II and Quick Panel II.

However, one design challenge remained, the flap.

In 2003, Alan and Scott took years of product knowledge and evaluation to begin the process of designing a pet door to overcome the flaws of the ones available on the market at that time.  They determined that flaps were either hard and potentially unsafe or soft but non-insulating and needing frequent replacements.  A conclusion was reached that the most desirable flap should be soft and flexible plastic to ensure comfort and safety for the pet since they will be opening the pet door with their face.  The problem with most common types of soft plastic like vinyl, is that it shrinks and hardens when it gets cold.  When it needs to keep the cold weather out, it can’t because there are gaps around the edge and magnets cannot hold it closed.

The pet industry was evolving and by 2004 was ready for a high quality, durable, safe flap that sealed and insulated well.

The Endura Flap was engineered and manufactured to be the best pet door flap made and is the basis for the Endura Flap Pet Door line.  Its basic design is a dual-layered polyolefin flap with beveled vertical edges allowing for magnets to expand and contract the sides to seal shut.  There is a floating threshold on the bottom to close off the bottom edge of the flap.

Also, the flap swings freely on a rod eliminating the inflection point which causes other soft flaps to break and tear.

The new Endura Flap design was incorporated into various models over the next several years:

  • 2004 the Endura Flap Thermo Panel 3 for sliding glass door
  • 2005 the Endura Flap Door Mount
  • 2006 the Endura Flap Wall Mount
  • 2008 the Endura Flap Thermo Sash 3 for sash windows

In 2007 the Endura Flap high-performance pet doors won Pet Fancy Publications Editor's Choice Award based upon their superior technology and engineering.

Our newest product started in 2010 with a partnership between us and Comfort Design Windows & Doors.It is an Insulated Glass Unit (IGU) with a pet door built in for existing glass doors, sidelights and windows.  It utilizes the energy-efficient Endura Flap Pet Door to compliment the dual pane glass of the IGUs.

Demand for all products was strong and a new 10,000 square foot headquarters was acquired in San Luis Obispo in 2011.  It houses the main office, manufacturing and warehouse facilities.  The following year saw part of Patio Pacific’s history come full circle.  Nick Pullano, our current CEO, was hired to take over the leadership as CEO of Patio Pacific to allow Alan to ease into retirement.  When Nick was a student at California Polytechnic State University he worked constructing Endura Flap Pet Doors.  His meticulous hands-on, in-depth knowledge has contributed to minor improvements in the Endura Flap Pet Door line and continued refinement of the Customer experience on the websites.  The business continues to thrive due the hard work of long-term employees.  In 2015 Scott Mullikin was brought in to manage the sales, and in 2017 Trevor Franchi became the first Chief Operating Officer and continues the Patio Pacific tradition of making the best pet doors made in the world.

Dogs remain a huge part of our lives.  At the Endura Flap office in San Luis Obispo, California, every day is "Bring Your Dog to Work Day".   Not only is this amazing for our dogs and our staff, but it allows us to constantly test our products with real puppy expertise.


Upzy is proud to be an Authorized Dealer for all Endura Flap products.