Slant-Fin Sentry Boilers

Slant-Fin Sentry Boiler Overview

The Slant/Fin Sentry is a gas hot water boiler with an efficiency of 84.4% AFUE. The unit’s thermal targeting technology is designed to save on fuel by monitoring heat demand. A thermal pre-purge option is also designed to conserve fuel. The unit features a display which shows the boiler water temperature and boiler control’s setting, and LED lights help monitor the system. The Sentry’s insulated jacket is designed to prevent heat loss and provide quiet operation.

Questions about this model?

Consumer Reviews of Slant-Fin Sentry


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #3 of 7 Slant-Fin Boiler
  • 96.88% of customers recommended

Read Reviews of Other Slant-Fin Products

Find ratings and reviews for Slant-Fin Boilers, Furnaces and more

Read Reviews

Top 10 Boilers

See who made our list of the best Boilers of 2022.

See the Top Products

Find a Certified Heating & Cooling Professional In Your Area

Contact a top-rated local expert to help with all of your home's HVAC needs.

Slant-Fin Sentry Boiler Reviews

Showing 31-32 of 32 reviews

"Ideal for residential use. Quiet and doesn't require frequent maintenance. Customer service is helpful when needed."

4.0 rating
Somewhat Satisfied

– I have owned this Sentry boiler for 4 years, I bought it because it was supposed to have a longer life and Sentry is a trusted brand in this industry with a variety of products and services. – The unit is quiet and dependable, helps my energy bill by being a heavy duty, high effieciency model, and appears to be working properly. – The unit is Large, which is unfortunate in an apartment that it takes up a lot of space. – The unit has needed maintenance since it's original installation, but not a great deal of needed repairs over time. – When routine maintenance was needed, the Sentry customer service phone line and follow up was very helpful. – The unit was purchased at Home Depot and for the added charge came with a Home Depot warranty. – I would recommend this company and model number to a friend.

Memphis, TN

"Yet to Have a Problem With my Sentry Boiler"

4.0 rating
Somewhat Satisfied

This is the boiler I ordered as part of moving into my new home. I've only been at the new house for 3 months so I don't have an idea of how well this particular boiler is in the long-term. As of right now I am happy with it. One of the reasons I purchased it is because it runs on natural gas and this house actually has a natural gas tank buried underground outside. That is new for me as the last home did not have that. Anyway, I have never had a problem with the boiler heating water so far. It is quiet, and I have not run out of hot water ever. It's actually somewhat concealable compared to the water heater in my old house. This one is tucked in a corner behind a small wall. The last one almost needed its own room. I also don't use water like a madman but I have a family of 4. So a lot of hot water gets used. For the cost of the machine, I am extremely happy because it has not had any issues but it was a lot less expensive than many others that I saw when looking to purchase a boiler. So far I would say I am satisfied with the boiler but until it has been running for a year or so with no problems I cannot yet give an entirely full review. As of right now I am very happy with it. There have yet to be any repair needs, I have not seen any temperature extremes which is something I have seen in other hot water systems before. Also, it isn't going through gas as bad as I thought it may, so it seems to be pretty energy efficient.

West Chester, PA

Other Sentry Reviews

Based on comments from online HVAC forums, the Sentry is regarded as a good unit. Consumers on and had problems with their Sentry boilers not heating correctly that were both determined to be caused by a circulator and not the unit itself.

Sentry Warranty

The warranty for the Slant/Fin Sentry boiler is comprised of the following:

  • 1-year warranty on parts
  • Lifetime limited warranty on cast iron sections, prorated after the 10th year

Labor and shipping costs are not covered by the warranty.

HVAC Brands

Learn more about your home's heating and cooling system with our guides, how-to's, FAQ's, tips and more.

Ready to get a quote from an HVAC contractor?

Let us know what type of service you need and we can connect you with a certified local HVAC contractor.

Please enter a valid name

Please enter a valid phone number

Please enter a valid zip code

There are no dealers in this zip code.

Please enter a valid email address

Please select repair or replace

Please select heating, cooling or both