System Sensor says its SpectrAlert Advance Low Frequency Sounders and Sounder Strobes are the first notification appliances to meet the new NFPA 72® 2010/2013 low frequency requirements for certain new sleeping spaces. Studies driving these requirements have shown that a lower frequency is more effective at waking individuals in a fire event, including those with mild to severe hearing loss.
Many engineers tend to avoid or delegate the nitty gritty of a ground source heat pump system, from soil moisture effects to building system (im) balance. It's time for designers to get in the loop. Learn more about Grounded In Reality in the December issue. Other topics in the December issue include health care HVAC, Boilders, check out the Back2Basics, and more.