Best Of

Thank you @Roger ! I have read many positive reviews of EK on the forum. I did reach out to Marc back in May and he connected me with the EK contractors in my area. I had very positive interactions with everyone who came through for a quote. I appreciate you reaching out on the forum!

Thank you for your post, @FirstTimeHomeOwner , and for everyone's kind comments about Energy Kinetics.

I'd recommend reaching out to Marc Debois, Energy Kinetics territory manager in Vermont and New Hampshire. He can be very helpful in facilitating dealer interactions, answering questions, and with technical and other information. He can be reached at (603) 493-0508.

The Accel CS (EK1C) is the smallest size modulating condensing boiler we offer and it's built to last with a super durable design that we manufacture in the US (New Jersey). The oversized plate heat exchanger design for hot water combined with thermal purge operation deliver the best in condensing operation. The increased condensate keeps the boiler cleaner and thermal purge provides extremely high efficiency even with very small loads. The Accel CS also has the top performance in the world according to AFUE, but even better, it's real world heat and hot water efficiency separates it even further from other condensing boilers.

If you are interested, this post, I describe how to calculate heat loss using gallons of oil per year. This figure estimates design day including hot water (if applicable).

Please feel free to reach out to Marc, PM me, or call Energy Kinetics at 908 735-2066.

Thank you,

Roger

The GV90+3 would be right, based on your estimated heating demand. The System 2000 EK1 is a bit large for you application, but has rather sophisticated controls which enable it to work well on smaller loads — and is a very high quality boiler.

At least as imp;ortant is the craftsmanship and skill of the installer. A good installer can make even a mediocre boiler at least OK; a poor installer can make the best boiler in the world a mess. I believe the EK1 has a limited selection of installers.

Here are three different rating tables from three different boilers

You can clearly see before there was a Department of Energy in the 1950s boiler rating were dome by the American Gas Association (AGA) and the Institute for Boiler Ratings (I=B=R)  and all the boiler manufacturers used these ratings to rate their boilers.  The Weil McLain model D boiler that has an I=B=R Gross output of 90,000 was about 80% lower than the Input of the boiler at 112,000  

When the 1970s oil boiler was rated they used GPH for the I=B=R input and Gross output was changed from I=B=R to DOE output. That would make that oil burner about 84% efficient since one gallon of fuel oil is equal to about 140,000 BTU of energy.  At this point there are no yellow AFUE stickers yet but the Department of Energy has been formed to keep the cost of oil from getting out of hand.

In the current gas boiler you can see that the numbers are still the same but they all are under the direction of the DOE.  

• Input
• DOE heating capacity or output, and
• DOE NET

Still the same numbers as in the 1950s but the names have been changed to protect the innocent. So look at the NET number when the boiler says 70,000 it is really going to do a good job all the way up to 56,000 BTU heat loss on a design temperature day.  I believe you will be just fine with the GV90+3

EK is considered to be top of the line as long as you have a good installer. EKs technical support is among the best.

EK is on the forum and willprobably chime in.