HTP, part of Ariston USA, produces a wide range of highly efficient products and system components for space heating and water heating. Using the most durable components in the industry, HTP …

It has minimal heat loss, thanks to a 2" thick environmentally safe water blown foam insulation. Use the SuperStor Ultra in conjunction with a HTP high efficiency boiler to reduce operating costs even more!

HTP high efficiency water heaters consume anywhere from 10-50% less energy than standard models. The Energy Star certified Phoenix water heater has up to a 96% thermal efficiency rating.

Contact HTP Ariston Thermo USA LLC parent company of HTP 225 Dyer St., 1st Floor Providence, RI 02903 (800) 323-9651 Contact Technical Support: view support page

Warranty WizardWelcome to the Warranty Info Center, your go-to resource for all things related to product warranties. Whether you need assistance comprehending serial numbers, understanding …

The Elite Ultra High Efficiency Boiler was designed by Italian engineers with two things in mind: Quality and dependability.

Dependable Condensing Boiler & Combi Models The Elite Fire Tube Ultra Boiler and Combi models were thoughtfully designed by our Italian Engineers to combine efficiency, dependability, and quality …

HTP is the best choice for all your commercial water heating or space heating needs.

HTP Quality Control has found in certain cases of ELX-2000 installations the burner can prematurely fail causing unsafe and potentially dangerous operation of the product.

With an HTP high efficiency boiler you can achieve the heat your family needs while also saving money and energy. Unlike traditional boilers our high efficiency boilers modulate which allows the boiler to …