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| Model | AFU |
| KN2 | 92.7% |
| GX150 |
95.1% |
| GX200 | 95.1% |
4/14/2008 2008 Foundry-Factory Tour & KN Training
3/17/2008 Thermal Shock and how to prevent it
3/17/2008 Thermal Shock
6/6/2007 HUNTER ELEMENTARY
MERIDIAN, ID - The School District of Meridian, Idaho, serves over 30,000 students, and is the largest and fastest growing school district in the state. The district&rsquos newest school, Hunter Elementary, opened in the fall of 2005. Hunter Elementary is home to nearly 800 students.
When it came to the school&rsquos boiler needs, the school district required a high efficiency system that is also easy to maintain. The schools new HVAC system was designed by Charles Paulin (PE), of Musgrove Engineering PA of Boise. The low-temperature hydronic system design would be ideal for condensing boilers. Condensing boilers eliminate the need for low water temperature protection inherent with non-condensing boilers, and offer higher operating efficiencies. This is a deviation from the standard boiler system design used throughout the School District where two boilers were enabled/disabled (on-off fired) by a building automation system rather than using a modulating system. Buss Mechanical Services, also of Boise, was awarded the mechanical work for the project and owner Lenny Buss selected two HydroTherm KN-10 boilers for the job. The KN-10 from HydroTherm is a commercial gas-fired cast iron condensing boiler featuring unique &ldquoTru Flow&rdquo technology to control the fuel-air mixture at all firing rates and venting conditions. The combustion air is constantly measured to fine-tune the fuel gas flow for maximum efficiency. In addition, the boiler takes full advantage of the condensing feature by allowing it to operate at system return water temperatures of less than 128° F with no return water temperature limitation. These boilers are capable of maintaining temperature differentials of up to 100° F, and offer one of the best warranties in the market.
&ldquoThe KN-10 was the natural choice for this project,&rdquo said Trevor Thompson of Columbia Hydronics Company, a manufacturers&rsquo representative firm with offices in Boise and throughout the West. &ldquoThe KN-10 offers many unique features that go above and beyond the project requirements that will benefit the School District for years to come.&rdquo
For Hunter Elementary School, one of the key elements of the KN-10 is that the boiler comes standard with full modulation, resulting in reduced utility expenses for the life of the boiler. Although the KN-10 can be fired on-off, full modulation offers the opportunity for the boiler to operate at higher efficiencies. As an example, the KN-10&rsquos efficiency is approximately 88% at high-fire, with return water temperatures near 60° F as they will be in the heat pump loop.
With the same water temperature, but with the boiler at 1/3 input, the operating efficiency jumps to nearly 98%!
&ldquoModulation is now an integral part of the system,&rdquo said Thompson of Columbia Hydronics&ldquo and using the KN-10 boilers did not require any changes to the original system design by Musgrove Engineering.
&ldquoThe BAS is still only enabling/disabling each boiler as required by the building&rsquos heat pump loop temperature. However, each KN-10 boiler includes an independent, factory-wired controller that smoothly modulates the boiler via a PID algorithm.&rdquo
The KN Series, with models from 600 up to 2000 MBH ratings, offer 5:1 capacity modulation, low CO and NOx emissions of less than 20 ppm to meet SCAQMD and whisper-quiet operation &ndash in a compact footprint of less than 29-inches wide.
School officials are completely satisfied with the new KN-10 boilers and their performance, earning the KN-10 and everyone involved with this project an A+. The expectation of course, is to see honors-level grades for years to come.
Read the attached .pdf document for more information.
6/6/2007 FLATLEY COMPANY / ONE CORPORATE PLACE
DANVERS, MA - The Flatley Company is one of New England&rsquos leading real estate development and management companies. The firm operates more than a dozen corporate office facilities in the greater Boston area including One Corporate Place in Danvers, Massachusetts, a four-story office facility built in the mid-1980s.
When the original boiler in the Danvers facility started showing signs of aging, Flatley knew that it had to solve the problem before the winter heating season arrived.
The original heating system was comprised of a copper fin boiler connected to a heat pump loop that forced hot water through the various zones to provide baseboard heat throughout the building.
The new boiler had to be compatible with the existing heat pump system, require a minimal amount of plumbing and provide higher efficiency to minimize fuel consumption. Lastly, the new boiler also needed to fit into the small 12 x 12 foot boiler room.
Flatley turned to Sweeney-Rogers Corporation of Franklin, Massachusetts, a manufacturer&rsquos representative firm serving the plumbing, heating and HVAC industry. The company specializes in commercial applications that require high efficiency solutions.
"After a thorough analysis of their system and needs, we recommended that they go with two HydroTherm KN-6 cast-iron boilers," said Mike Rogers of Sweeney-Rogers. "This would provide Flatley with the same 1.2 million BTU of heating capacity, which was what the old system offered."
Most importantly, the new boilers are much better suited for the application and low water temperature in the existing system.
"Water temperature was really what killed the old system,&rdquo said Rogers. &ldquoIn a typical hydronic system with the old type of boiler, the water temperature would be in the 130° to 190° F range, depending on the actual heating requirements of the building and the outside temperature. The problem was the temperature was much lower, around 80° F, which required a condensing boiler for the system to work properly."
Unlike the previous boiler, the KN-6 is a condensing or high efficiency boiler that operates with lower flue gas temperatures, lower flue gas emissions and reduced fuel consumption by recovering the heat that would otherwise be lost up the flue.
With a small footprint of less than 27-in. wide, Sweeney-Rogers was able to specify two boilers that had the same general footprint as the original boiler, and provided the owner with the added reliability and peace of mind of a redundant system.
High efficiency boilers typically operate at efficiencies of 85 to 95%, or about 10 to 15% higher than traditional boilers. This boiler design was ideal for The Flatley Company property and promised to provide an estimated 15% to 20% higher efficiency rating than the old boiler, resulting in significant potential fuel savings.
The Legacy Management Group, Inc. (LMG) of Wellesley, Mass., an integrated property management company that specializes in HVAC, general maintenance and janitorial services, was hired to install the new boilers for Flatley.
From start to finish, the job went very smoothly and was completed in October before the weather turned cold, and the start-up, supervised by Sweeney-Rogers, went without a hitch.Read the attached .pdf document for more information.
4/5/2005 Springfield, Colorado knows the importance of reliable heat.
HydroTherm’s new KN-10, a 1 million BTU boiler, provides the town of Springfield, Colorado with the peace of mind that comes from knowing that its standby electrical generators are always ready.
The KN-10 Boiler was recently installed to maintain 110° F hot water to the diesel engines that drive the back-up generators. Power can be supplied immediately in the event that there is a failure with the main power grid which supplies electricity to southeastern Colorado.
By not keeping the engines warm, it would take three to four hours before the back-up generators could be started.
The KN-10 is a cast iron commercial, gas fired boiler specifically designed to condense in low temperature applications. The system features Tru-Flow technology to control the air-fuel mixture at all firing rates and venting conditions, and combines high efficiency (up to 93%) with a small footprint. It is ideal for use in demanding applications such as schools, hospitals, large apartment buildings and offices.
The HydroTherm KN-10 was installed by Wright Plumbing & Heating of Colorado Springs, Colorado in November of 2004.
7/26/2004 HydroTherm KN-10 Boiler Honored in ACHR News Dealer Design Awards
"Obviously we are very pleased with this honor," said Floyd Lewis, product manager for HydroTherm. "The KN-10 was just introduced in May and is already gaining widespread approvals from both contractors and building owners alike. Its unique design represents the state-of-the-art in commercial boiler design."
The HydroTherm KN-10 is a self-adaptive commercial boiler that adjusts air and fuel under many conditions and "thinks for itself' to maximize performance and boiler safety. As such, the boiler can be used in many areas where air-inlet pressure issues may occur without any degradation in performance. The high efficiency, small footprint cast iron boiler offers a 1 million Btu/hour input in a condensing design with efficiencies of up to 93 percent.
ACHR News Publisher John Conrad stated, "Manufacturer design teams are coming up with unique ways to assist contractors in installation, service, and maintenance. This awards program is an ideal way for our magazine to call attention to products that are designed with the installing dealer in mind."
Winning entries in the Dealer Design Awards are featured in the July 19, 2004 issue of The ACHR News.
For additional information about the HydroTherm KN-10 boiler or any product, please contact:
HydroTherm
260 North Elm Street
Westfield, MA 01085
Tel: 413.564.5515
or on the web at www.hydrothermkn.com
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