With automatic sequencing, both boilers operate at the lowest rate to optimize efficiencies
September 5, 2016
With failing boilers and an inefficient heating system, historic Zion Episcopal Church in Oconomowoc, Wisconsin, needed guidance and help. New, high-efficiency condensing boilers from Weil-McLain provided the answer to solve their heating woes.
The hot ticket at the recent Air-Conditioning, Heating, and Refrigeration (AHR) Expo was a seat at Building Services Research and Information Association’s (BSRIA’s) presentation on global HVAC trends.
The U.S. General Services Administration (GSA) has released three new reports as part of its Green Proving Ground program, which tests building technologies in real-world situations to evaluate their potential to save energy, water, and reduce utility costs.
Two dual-fuel natural gas/propane and No. 2 fuel oil condensing boilers — GMI-8M-DF and GMI-4M-DF — have been added to the company’s condensing boiler lineup. The boilers can run either natural gas or propane as the main fuel with No. 2 fuel oil as the backup.
Five million- (FBN5000) and 4 million-Btuh (FBN4000) units have been added to the Crest® condensing boilers. The line also has been expanded to include a dual-fuel gas train. Additional product enhancements include lower-firing input-derate numbers in high-altitude applications.
Bryan Steam will be displaying its ultra-high efficiency Triple-Flex™ Series of hot water condensing boilers, which deliver a minimum 90 percent operating efficiency with 160°F return, 180° supply at maximum input.
The new residential boiler efficiency standards just went into effect in September, with gas-fired hot water boilers now having to be a minimum of 82 percent AFUE. Many in the industry note that sales of higher efficiency boilers have been trending up, so homeowners are already expressing interest in better efficiency.
The P-K MACH® condensing boiler dual-fuel product line has been expanded. According to the manufacturer, switching from natural gas to propane is fast and easy, only requiring flipping a simple toggle switch.
The XFyre™ and XTherm™ are commercial modulating, condensing boilers. The boilers are now CSA-Certified for polypropylene venting, when used with Centrotherm Innoflue venting components. Innoflue polypropylene venting is ULC-S636- and UL-1738-approved.