IAPMO and EGS Tiled Spas & Hot Tubs

IAPMO EGS Certified Spas are rigorously tested as a unit for NEC compliance nationwide and is CEC, (California Energy Code) approved for unrivaled efficiency for ultra low running costs and plug/play reliability. 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 (IAPMO) EGS program the International Association of Plumbing and Mechanical Officials, a globally recognized authority in electrical, plumbing, and mechanical product certification. Multiple sizes available with these certifications.

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 highest quality product that is designed to last a lifetime.