Integrated ECM pump and DHW diverter valve on all models
Modulating Combustion up to 11:1
Small zone valve systems may not require an additional pump or a low loss header
Easy service access and quick component connections
Get the Residential Boiler NTI in just a few steps
Make an order
Contact us to buy a new boiler. Our team will guide you every step of the way and help you choose the right model.
Arrival of a technician
After confirming your order, our technician will arrive at the appointed time to inspect the property and clarify the necessary details.
Delivery and installation work
We will deliver the boiler to you. Our team will handle the installation with efficiency and professionalism, ensuring a seamless setup.
Get a warranty
Our warranty covers various parts and services, and even after its expiration, we provide reliable post-warranty services.
Why should you buy NTI Residential Boilers from us?
9.7/10
215 reviews
4.8/5
reviews
Zenaida Arahan
Nov 01, 2025
Superior HVAC Heating and AirConditioning replaced my water boiler fast and professionally. The tech named Farid was neat, knowledgeable, and friendly. Excellent customer experience from start to finish. Highly recommend!
May Joy Vallejo
Oct 31, 2025
Superior HVAC Heating and AirConditioningprovided outstanding water heater repair service. The technician named Daniel was prompt, courteous, and completed the job efficiently. I appreciated their professionalism and transparent pricing. Will hire again.
Teresa Jordan
Jan 05, 2026
Tyler and team were fantastic, explained everything in detail . Very polite , work was does in timely matter . Would definitely call on there services again .
Summer pollard
Dec 18, 2025
Superior HVAC service was awesome start to finish. My furnace died on the coldest night of the year and they came out late night to diagnose my unit. My new furnace was installed the next day! Highly recommend them
Hudson Ng
Jan 27, 2026
Mike did an excellent job fixing our frozen pipe. He responded quickly, explained exactly what was going on, and got everything repaired efficiently. His work was clean, professional, and reasonably priced. It’s clear he knows what he’s doing and takes pride in his work. I’d highly recommend Mike to anyone needing a reliable plumber—especially in an emergency.
Aarav Mehta
Feb 08, 2026
I contacted Superior HVAC Service, Heating & Air Conditioning St. Catharines for a furnace issue during cold weather. The technician diagnosed a faulty part, completed the repair efficiently, and tested the system thoroughly before leaving. Professional service and fair pricing.
We will deliver Residential NTI Boiler to any of these cities
Nov 01, 2025
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