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.