IAPMO and EGS Tiled Spas & Hot Tubs

IAPMO EGS Certified Spas

Mountain West Custom Spas is proud to offer the latest creation from the Nespa Tiled Spa laboratory — The Signature Series.

These spas are certified through the International Association of Plumbing and Mechanical Officials (IAPMO) EGS program — a globally recognized authority in electrical, plumbing, and mechanical product certification.

What IAPMO EGS Certification Ensures

✔ Verified safety and compliance

✔ Nationwide NEC approval

✔ Reduced installation complexity

✔ Lower construction costs

✔ Exceptional cold-climate efficiency

✔ Long-term operational savings

Each spa is fully built, wired, and plumbed prior to delivery. Certification confirms electrical compliance, safety standards, and energy efficiency as a complete unit.

The result is a simplified installation process with increased heating efficiency — delivering long-term energy savings without sacrificing cutting-edge function or luxury finishes.

Simple On-Site Requirements

Because these spas are entirely self-contained and require limited electrical infrastructure, they can often be installed without major service upgrades — making them ideal for post-construction additions or projects with limited electrical or HVAC capacity.

Most models require only:

  • 50A GFCI for controls, pumps, lights, and heater

  • 30A GFCI for an optional slave heater

This streamlined configuration reduces field wiring, inspection complexity, and overall project coordination.

Versatile Installation Options

Signature Series spas are engineered for flexibility:

  • Set directly on grade

  • Installed within a vault

  • Integrated seamlessly into hardscape

  • Built into decks or architectural structures

Their self-contained design allows straightforward integration while maintaining full functionality and service access.

Long-Term Efficiency & Energy Savings

Each spa is insulated to R22 within an insulated FRP board enclosure and equipped with ultra energy-efficient equipment engineered for up to 50% energy savings.

The heavily insulated enclosure enhances heat retention, reducing the energy required to heat and maintain the spa — especially in cold-weather climates.

Advanced Technology & Luxury Finishes

Every Signature Series spa is built without compromise, offering:

  • Luxury custom tile selections

  • Multiple step configurations

  • Multi-colored LED lighting

  • Wireless controls

  • Customized bench and jet elevations

  • DEL AOP ozone/UV alternative sanitation system to minimize chemical usage

  • Walk-on, wildlife-approved insulated safety covers

No expense is spared in delivering the ultimate spa experience.

Smarter Engineering. Simpler Installation. Superior Performance.

The Signature Series combines nationally recognized certification, installation efficiency, advanced insulation engineering, and refined luxury finishes — delivering a spa system designed for performance, longevity, and ease of ownership.