5 Ways to Cut Your Hot Tub's Energy Bill Without Sacrificing Comfort

The most common myth we hear in the showroom: running a hot tub in Colorado costs a fortune in electricity.

A well-built spa costs roughly the same as running a second refrigerator — about $15–30 a month, even through Front Range winters. When owners see three-digit bills, the cause is almost always one of five fixable problems. Here's the list, in order of impact.

1. Fix the Cover First — It's 60% of Your Heat Loss

Your spa loses more heat through its cover than through every other surface combined. A worn cover — saturated foam, a cracked vapor barrier, a sagging core — can double your heating bill on its own. Test yours: if it's heavy, waterlogged, or the vinyl is brittle, it's costing you money every single night.

This is why we lead with the THRML AIRCAP 1™ foam-free cover. Its air-core insulation cannot absorb water, so its R-value never degrades — the same insulating power at year five as day one, at a steady 35–40 pounds. It's the highest-impact energy upgrade a spa owner can make.

2. Full-Foam Insulation Matters in Colorado

Not all spas insulate equally. Full-foam construction — filling the cabinet cavity around the shell and plumbing, as every Aspen Spa does — locks heat in and protects plumbing from Colorado's freeze-thaw swings in one move. Cheap air-gap cabinets bleed heat and leave plumbing exposed to sub-zero nights.

If you're shopping, ask to see the insulation spec, not just the jets-per-seat count. Insulation is the spec that decides your monthly bill for the next ten years.

3. Stop Cranking the Thermostat Up and Down

Turning a spa down between uses and reheating it before each soak costs more than keeping it steady — reheating several hundred gallons from a deep setback pulls heavy power, and circulation pumps run hard during recovery. Set your temperature once (100–102°F suits most owners) and let the thermostat manage it.

Exception: if you'll be away for a week or more, a modest setback of a few degrees is worth it. Just don't power the spa down in cold weather — freeze protection always outranks the savings.

4. Keep Filters and Water Balanced

A clogged filter forces the circulation pump to work harder and shortens heater cycles — invisible energy waste that shows up on your bill. Rinse filters every two to three weeks and replace them on schedule. Balanced water also protects the heater element; scale buildup on an element insulates it and stretches every heating cycle.

5. Mind the Wind and Location — If your spa sits exposed to Colorado's winds, an uncovered or even covered spa loses heat to convective stripping far faster than a sheltered one. Windbreaks — fencing, evergreen screening, even a spa-side privacy panel — measurably cut heat loss. Position matters when you install; our team advises on placement at delivery.