The Nissan 370Z Project Clubsport 23 Has a 400-HP Twin-Turbo V-6 | Air Heat Exchangers

Southern Air recently completed full MEP design-build work for the Hotel Madison in Harrisonburg, Va.

If super-insulated, small buildings ever become the standard way to build a home, geothermal heat pump manufacturers such as Waterfurnace and LSB may have something to fear from air source heat pumps.  Fortunately for GHP manufacturers, but unfortunately for the rest of us, that day is still a long way off.

Henderson acknowledged that ambient climate is a factor in a CO2 ice rink’s efficiency, though the installation of an adiabatic condenser has been shown to enable a transcritical system to run efficiently in most of the U.S. In Anchorage, because of its far-north location, the CO2 ice rinks can operate efficiently with air-cooled condensers, though “that’s the exception,” he said.

NFPA also has made changes to fire code that allows duct-type smoke detectors to issue a supervisory condition when they sense things like dust, dirt, and other substances in the environment that might otherwise be interpreted as smoke. This type of smoke detector attaches to a return air duct using a special housing and sampling tubes to determine if there is smoke present in the airstream.

The study of the Ventilation System market by HTF MI provides the market size information and market trends along with factors and parameters impacting it in both short- and long-term. The study provides a 360° view and insights, outlining the key outcomes of the industry. These insights help the business decision-makers to formulate better business plans and make informed decisions for improved profitability. In addition, the study helps venture capitalists in understanding the companies better and make informed decisions. Some of the key players in the Ventilation System market are Panasonic, ZEHNDER, Broad Clean Air, Honeywell, aldes, NATHER, DAIKIN, BROAN, airdow & Vortice.

As a direct system, CO2 produces better quality ice than a secondary glycol system, said Rodier. That’s because CO2 changes from liquid to gas under the rink, cooling the rink at a constant temperature throughout, in contrast with glycol, which produces slightly different temperatures across the rink, he said. “Skaters and operators notice. Even the Zamboni is quicker with a direct floor.”

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Many rinks, noted Chemours and the NHL, also use high global warming potential (GWP) HFCs like R507 and R134a, which are being phased down globally via the Kigali Amendment to the Montreal Protocol. (The U.S. has yet to ratify the amendment.)

False: High CO levels = cracked heat exchanger. See above. We usually test CO levels in the flue gas at furnaces, but not with the idea that this will tell us about a cracked heat exchanger. Heat exchangers fail when the metal rusts through or when it cracks. CO does not cause this.

These cranky doom sayers are right; we build houses tighter today and this certainly causes problems, but we’ve also figured out how to help prevent mold and moisture problems, and how to improve indoor air quality.  This is where HRVs come in.

Tiny units are not the only approach to the problem; when The Heights was built in Vancouver, they used mechanical rooms on the top floor and a big mess of ducts down to all the units. When I asked Passive House expert Monte Paulsen about these individual units, he noted that filters had to be changed regularly and that meant either the people in the apartments had to do it, or management had to gain access on a regular basis. Both are problematic.

The Ford Raptor has a problem: it’s monstrous. While it makes a lot of sense on the Baja Peninsula or bashing through snow outside of Park City, it makes no sense whatsoever in the city. For all of Los Angeles’s sprawl, it’s a city shockingly devoid of space. Designed around normal sized cars, not behemoth trucks, and with many garages and driveways designed 50, 60 years ago, LA isn’t ready for the Raptor.