Thermal Information

We all have a general understanding of the insulation R-Rating System.

R-Rating is a measure of how a material resists the flow of heat through that material. There are now many superior, heat-retaining materials available to insulate these days instead of the 50-year-old hot tub style design with thick foam covers.

We at E2E have tested the E2E Swim Spa Cover against the 3 inch R-19 foam cover and the 5 inch R-30 foam cover. The E2E Swim Spa Cover outperformed them both in climate control test chambers, saving customers daily energy consumption and costs.

The reasons for this, which link directly to the materials used in the designed of the End 2 End Swim Spa Covers®.

  • The E2E Cover’s one-piece system, locks in heat vapor which stops convective heat loss. There are no sections or seams for heat loss like on an outdated conventional hot tub style cover.
  • Air trapped in our multi-layered cover stops conductive heat loss.

These factors, locking in of the heat vapor and air entrapment within the cover is why we outperform the other cover systems.

The E2E Cover® provides consumers energy efficiency, one-person ease of use, and longevity.


The following testimonials extracted from the from the E2E Website are from customers who have purchased an E2E Swim Spa Cover and have commented on the thermal benefits gained from the E2E Swim Spa Cover.

There are many other testimonials received from customers on our website under the Testimonials webpage.

The link below will take you there.

I just wanted to email you guys to tell you how happy I am with your cover. I built this swim spa myself and put it in service last April (perfect timing before the pandemic!). Your cover is the icing on the cake – never a moment’s hesitation to get in the swim spa, ’cause it’s so easy to remove your cover. Also, I’d have to say, I’ve been impressed with how energy efficient it has been.

The Best decision I made in building this thing was getting your cover.

Thanks, and keep up the good work!

Erik Neumann…West Linn, Oregon…June 2021

I’ve been meaning to write but am just now getting around to it. Wanted to tell you we absolutely love our swim spa cover!  It’s works great and is much easier to maneuver than our previous one. Thanks so much!  If you ever need a recommendation, feel free to contact us!

Meg Moseley…Harrodsburg, Ky…June 2020

Love the new cover – we are now getting our moneys worth out of the spa…thank you for a great product!

Mary Christopher…Granbury TX…May 2020

What an improvement on my old cover, so much lighter than my old cover, and so easier to work with.

Valerie Thompson…South YorkSshire, UK…May 2020