Free Shipping on orders over $300. Some exceptions apply 1-866-361-4782

HTP Elite Ultra Duo Boilers

Highly Efficient Condensing Heating Boilers

High Efficiency Heating
HTP’s Elite Ultra Duo High Efficiency Heating Boiler combines two XtraTech Durable Stainless Steel heat exchanger modules in one enclosure. Both modules are tied into single connections for gas, venting, water piping, condensate and wiring, and are 100% quality and safety tested at the factory. The Elite Ultra Duo boiler is packed with the latest technological developments, including a touch screen to ease programming, and smart WiFi connectivity for thermal home comfort and energy efficiency. With no crucial detail left unnoticed, the Elite Ultra will perform at its best when you need it most.

Dual Heating Modules for High Efficiency Heating
The Elite Ultra Duo’s two XtraTech Durable Stainless Steel heat exchanger modules offer increased modulation, reduce wear and tear by spreading the heating load, and provide built-in operational redundancy. The Elite Ultra Duo features models with firing rates between 285,000 and 399,000 BTUh and up to 20:1 modulation turndown ratio to limit short cycling for more efficient energy consumption. Energy savings are guaranteed with up to 96% Annualized Fuel Utilization Efficiency (AFUE). If for any reason one module should encounter an error and need to shut down, the other will take over. Modules can be isolated for regular maintenance.

Durable Heating Technology
The Elite Ultra Duo comes equipped with the patent pending XtraTech Durable Stainless Steel Heating Technology, a proprietary heat exchanger. The high grade stainless steel ensures maximum quality at the heart of the boiler and resists corrosion to guarantee reliability for years to come. The innovative heat exchanger design provides an increase in water flow which creates more internal turbulence. The turbulence acts as a scrub to the internal walls and reduces heat exchanger deposits ensuring a longer lifetime in your boiler.

With a pipe surface that is up to 400% larger than conventional designs, the Elite Ultra Duo ensures extremely low pressure water pressure drop and high performance. Corrosion doesn’t stand a chance against the XtraTech stainless steel heat exchanger corrosion, ensuring your boiler has a long lifetime and less maintenance.

Touch Screen Display
The Elite Ultra Duo’s easy to use touch screen interface showcases full text and an intuitive menu. From the Global Home Screen, you can quickly determine the operating conditions of not only the system, but both the right and left heating modules. With just the touch of a finger, easily set the temperature you desire, activate functions, and manage each separate heating module or the entire heating system. A color coded alert system lets you know when the unit is operating, maintenance is needed, or when something needs to be checked by a professional.

Get Connected, Stay Connected
The Highly Efficient Elite Ultra Duo comes equipped with HTP Link Technology, a WiFi solution that enables remote monitoring of the appliance and system. Monitor your boiler on the go or allow qualified personnel to be notified when faults or other key activities occur in the boiler, giving you peace of mind wherever you are.

When you are on location, the simple to use, high resolution touchscreen provides a clear visual of system operation, allowing easy monitoring and troubleshooting if necessary.

HTP Elite Ultra Duo Documents:
Brochure  |  Installation Manual
Specifications  |  Submittal Data List  |  Warranty

HTP Elite Ultra Duos ship via pallet freight, please call for freight quote prior to placing order
HTP Boilers must be installed and serviced by a licensed contractor.
When commissioning a boiler you will need an electrician and gas technician with combustion analyzer and manometer to properly set up your new appliance. Boilers come set up for natural gas and must be converted to liquid propane on site.

HTP Elite Ultra Duo Boiler

Part No: ELUD-285FBN

$8037.03 each

HTP Elite Ultra Duo Boiler

Part No: ELUD-285FBLP

$8037.03 each

HTP Elite Ultra Duo Boiler

Part No: ELUD-301FBN

$8156.72 each

HTP Elite Ultra Duo Boiler

Part No: ELUD-301FBLP

$8156.72 each

HTP Elite Ultra Duo Boiler

Part No: ELUD-399FBN

$9329.70 each

HTP Elite Ultra Duo Boiler

Part No: ELUD-399FBLP

$9329.70 each
↓Volume Water Heaters↓


Part No: ELX-1500FVWHN

$24429.24 each


Part No: ELX-650FVWHN

$11519.11 each


Toll Free: (866) 361-4782

Fax: 206-274-1501

17420 Vashon Hwy SW
PO Box 2270
Vashon, WA 98070

Copyright © 2024 All rights reserved.