Energy Kinetics Accel CS Boilers

Energy Kinetics Accel CS Boiler Overview

The Energy Kinetics Accel CS is a condensing gas boiler with an efficiency rating of up to 96% AFUE. The Accel CS was named an Energy Star Most Efficient 2015 product and according to the manufacturer is made with up to 5 times more stainless steel than any other condensing boiler. It is designed for either wall hung or floor mount installation and can be easily converted from natural gas to propane. It comes standard with a 5 zone control, expandable to 12 zones, and can be vented in several chimney and sidewall configurations. The unit uses a stainless steel side tank vessel to produce hot water, and SmartBoost technology allows the system to adjust to changing demands for optimal comfort and efficiency.

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Consumer Reviews of Energy Kinetics Accel CS


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #1 of 3 Energy Kinetics Boiler
  • 100% of customers recommended

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Energy Kinetics Accel CS Boiler Reviews

"Silent and efficient"

5.0 rating
Very Satisfied

I have owned this boiler for 3 years now and have had no problems with it. It is quiet enough that my children in the next room are not awoken by it, and it is efficient enough to save me substantially on my utilities bills compared to when I had my last boiler. I would certainly recommend this brand to a friend, as it has definitely paid for itself in savings. I do not necessarily dislike anything about it. I would certainly buy an Accel brand boiler again. I have never needed a repair.

Fairfax, VA

Other Accel CS Reviews

There are very few comments regarding the Accel CS on HVAC forums. In a discussion regarding the Energy Kinetics System 2000 on is a comment about the Accel CS being an Energy Star Most Efficient 2015 product from a homeowner who has the Accel CS in his home. A homeowner trying to decide between the Accel CS, a Viessmann and a Triangle Tube unit on only received replies from a couple of members who were not familiar with the products.

Accel CS Warranty

Product registration is required for maximum warranty coverage. The warranty for the Energy Kinetics Accel CS boiler is comprised of the following:

  • Lifetime limited warranty on the pressure vessel

The warranty can be transferred to a new owner within 5 years of installation.

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