- Menu
- Space Heating
Space Heating
HTP's space heating boilers provide ultimate comfort and the best overall efficiency ratings while keeping maintenance and operating costs to a minimum. With a HTP high efficiency boiler you can achieve the heat your family or business needs while also saving money and energy.
Residential
Commercial
Not sure which type of space heater is right for you? Learn more by viewing our space heating selection guide
Can’t find your product? Click here
Discontinued products Click here
- Water Heating
Water Heating
Residential
Tank TypeGas SeriesElectric SeriesCommercial
Tank TypeGas SeriesElectric SeriesHTP has several water heating options for your needs: tank type water heaters, tankless water heaters, our Crossover series water heaters, or supply boilers. HTP also has models for both your residential or commercial needs.
Not sure which type of water heater is right for you? Learn more by viewing our water heating selection guide
Can’t find your product? Click here
Discontinued products Click here
- Indirect Water Heating
Indirect Water Heating
HTP's Indirect Water Heaters can be a part of your combination heating system whether you need indirect tanks or storage tanks for your residential or commercial needs.
Not sure which type of indirect water heating option is right for you? Learn more by viewing our indirect water heating selection guide.
Can’t find your product? Click here
Discontinued products Click here
- Combination Appliances
Combination Appliances
Combination appliances save homeowners money on operating expenses, reduces overall installation costs, and takes up less space than traditional space heating and hot water appliances.
Floor and Wall Combis
Phoenix Series
The High Efficiency Crossover Wall Water Heater
The best of both a tank and tankless water heater combined into one superior unit. The Crossover® Wall allows you to enjoy the benefits of a high efficiency unit without surrendering your need for endless hot water and abundant water pressure. The crossover design prevents spontaneous bursts of cold water, which are typical for most tankless water heaters. As user demand increases, the Crossover can provide hot water at higher pressures for multiple fixtures and has built-in recirculation capabilities.
Watch and Learn
How our Crossover Technology Works
The Crossover Wall combines the flow capacity of the tank with the continuous flow of the tankless and has none of either drawbacks!
The Crossover's fire tube design prevents spontaneous bursts of cold water, which are more typical for most tankless water heaters. As user demand increases, the Crossover can provide hot water at higher pressures for multiple fixtures. The Crossover also features dual activation by flow or thermostat unlike traditional tankless. The Crossover does not require a .5-.75 GPM for activation so the unit is guaranteed to deliver hot water even with low flow fixtures.One of the most important features of the Crossover is its ability to provide endless hot water at the fixture due to its built-in recirculation capability. This unit uses an internal pump and an intelligent control system which can recirculate water through the plumbing system. It has three operational recirculation modes - Pulse, Smart (Auto Learn) and Time Sequenced.
learn more in our user manual 
Two in One
With two technologies in one, you'll have immediate start up and endless hot water. HTP's integrated system delivers hot water on demand when you need it most! Additionally, it includes a small storage within its heat exchangers for easy recirculation and fast hot water delivery without pressure loss.
Outstanding Quality
The Crossover Wall is made with an advanced hi-fin heat exchanger designed for superior performance. It has a durable 316L stainless steel with up to a 3.5 gallon fire tube heat exchanger and provides zero flow activation and scale prevention technology. The Crossover is a wall mounted unit to save space and has built in recirculation pumps with bottom connections.
The Crossover's Multifunction Control Panel features a customized temperature control system. This control system includes a user friendly flow control, flow sensor, and a heat capacity control system. These controls work together to make domestic hot water even more comfortable by maintaining constant temperature while the unit is in use.
ModelInstallationBtuh/Input RangeUEFRGH-150Indoor15,000 -150,000.94RGH-199Indoor19,900 -199,000.92RGH-150O**Outdoor15,000 -150,000.94RGH-199O**Outdoor19,900 -199,000.92Inside the Crossover
A better experience with every installation
HTP’s Crossover can be used in both residential and commercial applications. The Crossover can be used in several applications, such as recirculation lines, solar water heating and geothermal applications. The Crossover has top vent connections and can be vented with ULC S636 Polypropylene, PVC, CPVC or Stainless Steel vent materials. Its total combined equivalent length, including fitting allowance for both intake and exhaust shouldn't exceed 100' in 3" pipe or 50' in 2" pipe.
Installing your unit outdoors just got easier, thank to our outdoor units!
See our various installation options below or view our installation manual.
Advanced Assurance
The Crossover is backed by a limited 12 year residential warranty or a limited 5 year commercial warranty, right out of the box! No registration is required.
Your Personal Assistant is a Download Away!
Download HTP’s FREE Mobile App. Perfect for when you need guidance on the job. You’ll be able to access installation manuals, parts and installation drawings, brochures, troubleshooting videos and more.
download the app
Get help buying
Testimonials
Rebate center
Warranty claim
Customer Support
HTP Warranty
Shop Parts
Stay Connected
© Copyright Ariston Thermo USA LLC parent company of HTP | 272 Duchaine Boulevard | New Bedford, MA 02745 | 800-323-9651 Careers | Sitemap
- Water Heating
