Brian Zimmerman, PE, has over 35 years of experience in the Commercial HVAC Engineering and Design market. The past 13 years, Mr. Zimmerman has designed over 350 Cannabis Cultivation and Processing Facilities across the US and Canada.
Mr. Zimmerman is an expert in sizing and specifying HVAC equipment in the indoor cannabis and controlled environmental agriculture (CEA) markets. His specialty is in HVAC equipment sizing, control, and capabilities for maintaining stable design setpoints for temperature and relative humidity (RH).
Litigation Support - A Registered Professional Engineer in Colorado, Arizona, and California, Mr. Zimmerman provides expert witness services to attorneys representing plaintiff and defendant. Cases include issues with cannabis cultivation and other indoor agriculture facilities. Services include on-site inspection, thorough reporting, depositions, and trial testimony as needed.
Areas of Expertise:
Indoor Cannabis Cultivation Environment
Cannabis Cultivation Engineering
Indoor Cannabis HVAC Requirements
Vapor Pressure Differentials (VPD)
Background Experience - Mr. Zimmerman served as the Executive Vice President of Engineering at Urban-Gro, Inc. from 2019 through August 2022. He was previously the President and Owner of Impact Engineering, Inc., a company acquired by Urban-Gro in March 2019. Mr. Zimmerman founded this company in 1997 to provide full-service HVAC, plumbing, and electrical engineering, and consulting for the cannabis commercial development industry.
In 2009, Mr. Zimmerman and his team at Impact Engineering designed the first cultivation facility in Colorado for Medicine Man Technologies. Since then, Impact Engineering has designed over 350 cannabis cultivation facilities across the US and in Canada. Mr. Zimmerman has perfected the ability to size and control the indoor environment with mechanical equipment to maximize the quantity, quality, health and consistency of product from harvest-to-harvest.
John A. Harris, is Principal of Landscape Economics, LLC, President of Earth Advisors, Inc., and a LANDSCAPE ECONOMIST who has worked in the Arboriculture, Forestry, landscape, and horticultural fields for over 40 years. Mr. Harris has provided reputable consulting, education, and project management services for projects across the United States and internationally, in both temperate and tropical ecosystems. Areas of Expertise include:
Landscape and Tree Risk Assessments
Landscape, Tree, Urban Forest, Nursery Plant Value Appraisals
The number of storms in recent years increases the need for better tree and landscape decisions for property owners. Research regarding landscape damages for different storm intensities, what plants get knocked down by winds more often, and priorities for landscape restoration have been intensified by many southern state universities' forestry and horticultural departments.
Trees and landscapes have been valued since humans were given gardens for food and enjoyment. Once people determined how to harvest seeds, how to plant gardens and landscapes, and how to relocate trees and plants, then decisions about what to use and what not to use began to set values for plants. It is this author's opinion that these practices logically date back to the beginning of history.
The value of a tree can only be determined if we agree. Any value given, whether by a layperson or a professional, is real when another person involved in the process agrees to that value. The value used in the final decision can also be a different value from the one determined by the experts who worked on it (especially when the experts worked on different sides of a valuation case).