If you’ve started researching hot tubs, you’ve probably come across the full-foam versus perimeter insulation debate. Full-foam is often presented as the “more efficient” option. But real efficiency isn’t about how a spa performs on day one. It’s about how it performs year after year, especially through real winters.
Full-foam insulation surrounds the plumbing with dense foam. At first glance, that sounds reassuring. It can reduce initial heat loss, and on paper, it checks a lot of boxes.
The challenge shows up later.
When service is needed, technicians have to cut through hardened foam to reach the plumbing. Once that foam is removed, it can’t be perfectly restored. Over time, repairs can leave gaps that reduce insulation performance, and in colder climates, that matters.
A Different Approach to Insulation
Arctic Spas® uses perimeter insulation—we call it FreeHeat—instead. Rather than encasing the plumbing in foam, the insulation is built into the cabinet walls. This creates a thermal barrier around the entire spa while keeping the interior accessible.
It also allows something important to happen: heat recovery.
Pumps and equipment naturally generate warmth while operating. In a perimeter-insulated spa, that warmth stays inside the cabinet and contributes to maintaining water temperature. Instead of being lost, it’s captured and reused, and keeps the acrylic shell and water warm. In cold weather, that extra efficiency adds up.
Built for Real Winters
Winter ownership changes the conversation.
With perimeter insulation, components remain accessible. If service is ever required, technicians can reach what they need without tearing apart the spa’s insulation system. That means faster repairs, lower long-term costs, and insulation performance that stays consistent over time.
The open interior also reduces the risk of trapped moisture, which can degrade materials and impact efficiency down the road.
Efficiency That Lasts
True efficiency isn’t just about initial insulation density. It’s about how well a system holds up after years of use, maintenance, and seasonal extremes.
A spa that maintains its insulating properties and allows proper servicing will continue to perform. One that loses insulation integrity with every repair may not.
Arctic Spas® chooses perimeter insulation because it supports long-term, cold-climate ownership. It’s not about short-term claims. It’s about building a spa that performs reliably through every season, for years to come.
Visit your local Arctic Spas® showroom to see the build quality up close, compare insulation systems, and get a feel for what real cold-climate engineering looks like outside of a spec sheet.
