man in dual zone swim spa with snow falling

Energy Efficient Hot Tubs 

TemperLok™, Heat Isn’t All You’re Saving.

PDC Spas® has engineered a unique system that maximizes energy efficiency and minimizes heat loss rivaling our foam-filled competitors. Unlike foam-filled units which hide manufacturing defects and make servicing expensive, the sophisticated engineering of our TemperLok™ system keeps the spa lightweight, economical to own and operate. The PDC Spas® design assures your insulation is intact from the day you purchase through the decades of enjoyment. TemperLok™ ingenuity was developed considering low monthly costs, service and installation for your long-term satisfaction.

Waste heat from pump operation warms the air cavity behind the cabinet and is radiated and absorbed back into the spa plumbing. Warmed air is trapped between our TemperBase™ insulated floor panel and cabinet top gasket creating efficient thermos air-tight insulation. 

temperlok hot tub insulation

Efficient Design for Economical Servicing

From the bottom up, PDC Spas® assures your unit is protected from cold temperatures and unwanted outside elements. A three-layered floor construction includes a tough ABS plastic which seamlessly covers the entire bottom, wrapping upward onto the cabinet sidewalls. A thick layer of foam insulates for temperature control while the wooden layer provides strength and rigidity for a unit that is both energy-saving and durable. An inside reflective thermal barrier ensures outstanding thermal efficiency. PDC Spas® TemperLOK™ insulation system provides maximum energy savings while maintaining a lightweight unit for easier installations. The use of a strong fiberglass, non-filled resin backing with an insulating foam coating provides maximum strength and efficiency. Using this process, a PDC Spa is more costly to manufacture, however each and every PDC spa unit is made with quality and efficiency in mind.

diagram of hot tub insulation

Heat Trapping, Safety Thermal Covers

PDC Spas® provides high-quality, energy-efficient covers with every hot tub and swim spa purchase. These covers are designed to minimize heat loss and maximize efficiency, sourced from reputable manufacturers to ensure durability and performance.

hot tub surrounded by mounds of snow

What Will Operation Cost?

That is a difficult question to answer honestly and one should be aware of the many variables that play into providing an estimate of energy use. In comparison, asking this question is similar to asking an auto salesman should you purchase a new car, how much fuel will I use. Your desired water temperature, outside temperature, how often you use the spa, the type of cover you have and how often it is covered plus the kilowatt charge in your location are all variables that are to be considered. 

With thousands of PDC Spa owners, who have enjoyed their spas for several decades, it is reported about $1-$1.50 per day in energy cost.

pdc spas hot tub on paver patio with large stone fireplace and patio seating

Experience Quality and Innovation with PDC Spas®

67 years of excellence and award-winning products. Proudly crafted in USA.


For over 67 years, PDC Spas® has been an unwavering beacon of quality and innovation in the spa industry. Our American-made hot tubs, swim spas, and fitness spas, crafted with meticulous attention to detail, reflect our commitment to excellence. With an unmatched industry-leading warranty, we ensure your investment in relaxation and wellness is safeguarded for decades. Based in Pennsylvania, USA, our legacy as a trusted industry leader continues to evolve, as we constantly push the boundaries of spa technology and design to enhance your well-being. Experience the PDC difference and transform your home into a haven of relaxation, fitness, and ultimate wellness, because when it comes to spas, we set the standard for excellence.