ENERGY STAT: THE AVERAGE COMMERCIAL BUILDING USES 26.6% OF ITS
ENERGY CONSUMPTION FOR SPACE HEATING, BUT ONLY 10.1% FOR SPACE
COOLING, ACCORDING TO THE ENERGY DEPARTMENT.
The Hawkeye State is ready to
launch its first net-zero com-
mercial project – the 100-year-old
Market 1 building in Des Moines.
A project spearheaded by Modus Engineering, a firm specializing in sustainable
and high performance buildings, Market 1
posed a series of difficult challenges. When
the 50,000-square-foot building was constructed in 1909, on-site coal storage and a
boiler determined its energy consumption.
With a $15 million investment, the completed Market 1 will feature one of the largest PV arrays in the Midwest, geothermal
heating and cooling, rooftop gardens, and
design elements to create a building that is
aesthetically pleasing and highly efficient
while maintaining its historical character.
The net-zero energy status means that
the property will produce all of its own
energy needs and any excess production
can be sold back to the grid and paid by the
➙“We are at a time and a place where tech- nology and desire are crossing paths,” says
Modus Engineering partner Harry Doyle.
“We’ve long wanted to do things like create
energy-producing buildings, but the technology was an obstacle. Now it is our ally.”
THIS CENTURY-OLD BUILDING will achieve net-zero energy using a PV array, geothermal heating
and cooling, and a green roof.
Iowa’s First Net-Zero Building UL Warns of Counterfeit
Mark on Solar Panels
UL is warning consumers about photovoltaic panels that bear a counterfeit
certification mark. Despite the mark, the
solar panel has not been evaluated by UL
and it is unknown whether the solar panels comply with any safety requirements.
The AstralENERGY250W, model
AE-CR250WP, is mentioned specifically as bearing a false UL safety
certification symbol. The panels are
manufactured and sold by Engineered
Systems Inc. doing business as
AstralEnergy Solar Manufacturing
Company, though the panels may
have been sold by others as well.
The release warns that anyone purchasing photovoltaic panels should
verify that the UL stamp is genuine.