The EnduroTi - High Mass Commercial Condensing Boiler

The EnduroTi® is a high mass commercial condensing boiler with a hyper-jet combustion system. It operates at up to a 93% thermal efficiency rating and has a 10:1 turndown ratio. It is manufactured out of an extremely durable stainless steel and titanium blend to resist corrosion and last longer!

view brochure

Watch and Learn

Free Consultation!

for more information and product savings, select an option below

Commercial Condensing Boiler with Ultra High Efficiency

EnduroTi Jet Combustion


The EnduroTi has up to a 93.2% thermal efficiency rating. Older gas boilers may only be using as little as 60% of energy consumed. Heating is the second largest energy expense in most homes accounting for 35-50% of annual energy bills in colder parts of the world. With the EnduroTi 93.2% of the dollar spent on heating is properly used to heat the home/building. That is great savings!

It’s extremely efficient hyper jet combustion system with a modulating inward firing burner allows you to save energy and money.


The EnduroTi comes in two models: 750,000 and 1,000,000 BTUs and can be cascaded up to eight units for 8 million BTUs to suit any commercial application. It has the ability to be used in the below applications:

• Radiant floor
• Fan coil
• Base board
• Snow melt
• DHW (with indirect tank)
• Pool heater (with indirect tank)

view specifications

Model Btuh/Input Range Thermal Efficiency
ETI-750 750,000 93.2%
ETI-1000 1,000,000 92.5%

Incredible Turndown For Bigger Savings

The EnduroTi has up to a 10 to 1 turndown ratio. Its modulating technology matches fuel consumption to demand to provide high system efficiency even during low load conditions. This greater turndown allows the EnduroTi to modulate at lower firing rates which reduces short cycling, conserves energy, and improves component reliability.

A Better Experience With Every Installation

The EnduroTi has the ability to cascade up to eight boilers (with boiler rotation) to satisfy your heating needs! Its small footprint (750k BTU model) will fit through a standard door opening! It has caster wheels on the bottom of the boiler for a smooth moving process.

The EnduroTi eliminates the need for primary-secondary piping. It vents in PVC, CPVC, and stainless steel. It has the option for horizontal, vertical, and indoor combustion venting (confined or unconfined space). Removable access doors facilitate easy access to all components to allow for better servicing.

view manuals

Cascaded EnduroTi with piping

The HTP Guarantee

The EnduroTi is backed by a limited 10 year commercial warranty, right out of the box! No registration is required.

view warranty

On the Go? Take HTP with You!



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

Have a question?
Chat Now


Read what others have to say
about our products?

Rebate center

Find available rebates
nearest you.

Warranty claim

Submit your claim,
its as easy as 1, 2, 3.

Stay Connected

App-Icon - HTP
Facebook - HTP YouTube - HTP Twitter - HTP Instagram - HTP LinkedIn - HTP

© Copyright Ariston Thermo USA LLC parent company of HTP | 272 Duchaine Boulevard | New Bedford, MA 02745 | 800-323-9651 Careers | Sitemap