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"V" is for Ventilation
And
“M” is for “More than one way to get the job done.” In this
two-school tour, we start with an underfloor ventilation design and
geothermal energy center in action. Then we take notes at a school
with displacement ventilation, radiant floor heating, and radiant
ceiling cooling. Round out the lesson with discussion of ASHRAE
62.1-2007 guidelines and the Wells-Riley equation for infection and
ventilation, and your next school project is practically getting
smarter already.
by Stephen Hamstra P.E., ASHRAE HBDP LEED AP, CGD
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 | Central Chilled Water System Modeling
Using
ever-popular computer modeling, we look at the characteristics of a
1980s-era chilled water system. The exercise points out that you
never really know how good the model is until the real thing is up
and running, but it also entails a thorough look at the systems and
their differences. The author also invites readers to “play along
at home” and compare notes on their model results.
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 | Commissioning Hydronic Systems
The
consistency of the process is part of commissioning’s value, but
each project includes different obstacles, installation issues, and
client team backgrounds. To coordinate performance in the piping,
expansion tanks, pumps, and other components of popular hydronics
systems, it takes a sound strategy of documentation, discussion, and
testing. From owner’s requirements to post-occupancy follow-up,
review how to put all the pieces together.
by Bryan W. Welsh P.E., BCA CCCP, LEED® AP
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 | Cooling Contingency Plans: They're Not Just for Emergencies Anymore
Temporary
HVAC may also prove helpful when taking equipment offline for
scheduled maintenance, tackling seasonal loads, or adding redundancy
to existing systems. Just as important, though, is the need to
consider your needs ahead of time to properly select the plans and
partners that can help you steer clear of avoidable problems.
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Boilers
The NeoTherm® condensing boiler from Laars Heating Systems is a fully packaged hydronic solution offering 95% energy efficiency.
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Solar pumping products
Taco’s new family of solar pumping products and technology combines all the features needed for a closed-loop water heating system.
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Hydronic tank controller
The new HydroZone hydronic tank controller eliminates the need for external control devices when used in conjunction with WaterFurnace GeoTank™.
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Split-system heat pumps
Fujitsu expands its 410A inverter Halcyon mini-split line with longer pipe lengths and improved efficiency.
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Snap-lock pipe
Ductmate's Greenseam+ includes a co-polymer gasket that requires no additional sealing once snapped together.
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Plenum fans
Continental Fan's latest offering features TEK backward curved airfoil wheels and material that is stronger than steel but half its weight.
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Remote monitoring software
Exele's TopView® v6.7 adds SMS notification via GSM modem, SQL Server® alarm logging, and integrated alarm history.
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