ASHRAE Journal - April 2020 - 87

SOLVING PROBLEMS

best practices for growing cannabis, leafy greens, and a
whole host of other crops in vertical farms, warehouses
and greenhouses," she said.
In the meantime, Roth suggested for designers to consult with the "Environmental Control for Animals and
Plants" chapter in the 2019 ASHRAE Handbook-HVAC
Applications. Roth also advised designers to consult with
HVAC manufacturers that specialize in grow facilities consultants who are experts in HVAC grow facility design. He
said TC 2.2 also has members who are experts.

Working with Growers
After determining the local calculations, the next step
is identifying equipment that can meet both the sensible
and the latent loads. And that can be a real challenge,
said Sabeh, because a lot of the conventional commercial or even residential equipment is just not built to
handle both of those types of loads really well.
"For these grow rooms, the sensible heat ratio can be
less than 0.5, which is jaw dropping for a lot of engineers," she said.

Then, engineers work with the project like they would
do in any commercial building. But growers can be a
different kind of client from other commercial building
projects. Understanding growers as farmers and the challenges they face with market pressures is critical, she said.
"Growers are a totally unique type of customer and client for us," she said. "They're very focused on farming...
They're making money by how productive their plants
are and how much they can sell that product to their
customers for."
Sabeh said growers rely on designers to provide the
best environment possible to make them productive and
profitable.
"Although cannabis has a high market value today, as
supply increases, prices will go down and so will profit
margins," she said. "By figuring out how to best design the
HVAC system (and other systems) using
the least amount of energy, water, and
other resources, we are helping them cut
their costs and remain profitable so we
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APRI L 2020

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ASHRAE JOURNAL

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ASHRAE Journal - April 2020

Table of Contents for the Digital Edition of ASHRAE Journal - April 2020

Contents
ASHRAE Journal - April 2020 - Intro
ASHRAE Journal - April 2020 - Cover1
ASHRAE Journal - April 2020 - Cover2
ASHRAE Journal - April 2020 - 1
ASHRAE Journal - April 2020 - Contents
ASHRAE Journal - April 2020 - 3
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ASHRAE Journal - April 2020 - Cover3
ASHRAE Journal - April 2020 - Cover4
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