Best High Efficiency Condensing Boilers
Ask any heating contractor which is the best high efficiency condensing
boiler and they'll all tell you the same thing: "The best boiler is the one that's
But when you visit the contractor forums, the five boilers mentioned most
frequently in a positive light are: Buderus, Lochinvar, Trinity Tube, Prestige
Triangle Tube, and Veissman Vitodens.
Each is favored for one or more of the following reasons: Price, Size,
Versatility, Reliability, Ease of Installation, Technical Support and, of course,
There is no clear winner here because every installation is different and one
particular make or model might suit the application and the home owner's
budget better than the others.
Below is a sampling of comments from different contractors describing the
advantages and disadvantages of the high efficiency boilers mentioned
above. (Each comment within quotation marks is from a different contractor).
Veissman Vitodens Boiler
"We have installed both Vito Dens 100 and 200. Buderus
GB142 and alot of Lochinvar Knights. The Vito Dens 200 is
the best product but it's price point makes it a difficult sell
to the average home owner."
"Of course it is highly complex and very expensive but based
on its use in Europe for much longer and stellar reputation
for Viessmann reliability it really deserves the highest
"As I've said before, Viessmann is an excellent product and
we do offer it, but is a hard sell because of the extra cost."
"The Buderus GB 142 is a great looking unit and installs
pretty easily. Their control options are somewhat limited but
will improve greatly with the RC35 whch will be coming."
"We have had outstanding success with the Buderus GB
Have had no problems at all with them - very affordable and
high quality. Aeshetically, I find them superior-looking in
comparison to many out there."
"Have installed Baxi was not impressed. Viessmann vidodens
200 is graet but very complicated - 230v 50 htz circ pump.
My favorite by far is buderous GB142. Simple and installs
very Quickly and is half the price of the Viessman."
"I personally am a big Buderus fan. Excellent product for the
money. I have many beautiful installations out there purring
along, saving folks money on their fuel bills. Another great
side feature is that I can seamlessly integrate all of
Buderus's solar product right into the boiler controls."
Lochinvar Knight Boiler
"We have concentrated mostly on the Knight's for several
reasons. First of all you can cover a huge cross section of
the residentail and commercial market with this product all
using the same built in control. This makes training service
techs very easy. With the addition of the wall hung units it is
now even better. The units look good and the foot print is
"I have been to the Locinvar Knight boiler presentation and
it appears to be a well engineered product. I have a couple
of jobs where building a wall to hang a GB 142 may not be
an option and the floor mount Knight would fit the bill nicely."
"I really like the Knights, a dream come true so far. Very
simple to set up. You don't have to be from the planet
"Smart 5" to make these things sing a nice quiet tune. Best
of all, made in the USA."
Trinity Tube Boiler
"Recently I've stuck to mostly Viessmann or NTI Trinity but
have installed many others. I put in Trinity's for customers
who want a system that is cost effective and Viessman's for
people who have more cash than brains."
"I have installed a number of diferent boilers in the past 5
yeeas and all where great the day they first where started
up. The true test is when you have a failure at night or the
weekend and you know tech support is not there.
I have called tech support on weekends and in the middle of
the night of many companies but all yet only one has called
me back NTI and it was the engineer at his home I could
hear his wife and children in the background I was
Prestige Triangle Tube Boiler
"The prestige solo is a really well thought out, simple,
elegant machine isn't it? We're really impressed. 6
replacement parts and you're fully stocked for service too...
"I have personally installed five of the TT prestige. It is a
great product also. I think it also is a nice boiler for the
"Based on my personal experience. We've installed a truck
load of the TT's with virtually no issues. Many on LP which
seems to be problematic with some of the mod/cons."
"My favorite is the Prestige. Very well made, very reliable,
well supported. I do not like the aluminum heat exchanger
brands because I have bad experience. I have had two heat
exchanger disasters with Buderus GB."
Which Boiler Is The Best?
The best boiler is the one that is installed correctly by a heating contractor
who offers 24/7 emergency service and values your business.