Integrated ECM pump and DHW diverter valve on all models
Small zone valve systems may not require an additional pump or a low loss header
Get the NTI High-Efficiency Boiler 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'll deliver the boiler to your location, and our experienced experts will handle the installation efficiently and professionally.
Get a warranty
You receive a warranty that covers various components and services, and when it ends, you can count on our post-warranty services.
Why should you buy a High Efficiency Boiler NTI from us?
9.7/10
215 reviews
4.8/5
reviews
Alan Gordon
Feb 19, 2026
Fast response to my emergency.Courteous service.Honest analysis and recommendations.Job completed same day so no interruption of water service.
Katrin C
Feb 17, 2026
Best experience ever, Andrew was quick, courteous and tidy. Very happy with the service we received.😁
Neelanjan Dalvi
Feb 08, 2026
Superior HVAC Service, Heating & Air Conditioning St. Catharines repaired my furnace when it stopped heating properly. They responded quickly, arrived on time, and clearly explained what needed to be fixed. The furnace was running perfectly the same day.
We will deliver a NTI Boiler High Efficiency to any of these cities
Feb 19, 2026
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