Registration                      8:00 – 8:30 am
Morning Session               8:30 am – 12:30 pm
Lunch (On your own)       12:30 – 1:30 pm
Afternoon Session           1:30 – 4:30 pm

Geothermal Heat Pumps and Indoor Thermal Comfort

Understanding the refrigeration cycle

The effect of air flow and insulation

How comfort is measured

Understanding efficiency

Understanding Earth Loop Systems

Architecture of closed loop systems

      • Horizontal ground loops

      • Vertical ground loops

Applications for open loop systems

      • Single well

      • Two-well systems

Evaluating topography

Measuring soil conductivity

Environments for ground-loop systems: beneath yards, fields, parking lots, and buildings

Designing Geothermal Systems

Determining loop type

Making heat loss calculations

Sizing the unit

Sizing the loop

Alternate geothermal designs

Choosing System Components

Basic components of geothermal heat pump systems: Pump, compressor, heat exchanger

Forced air systems

Hydronic systems

Domestic hot water options

Evaluating the Benefits of Geothermal Systems

Incentives to use geothermal

Measuring performance

Calculating savings and cost

Environmental benefits

Tax credits, incentives and rebates

Maintaining Geothermal Systems

Performing routine maintenance


6.5 Public Protection (HSW) Hours
6.5 AIA HSW Learning Units

Professional Engineers
6.5 PDHs

Building Performance Institute
3.25 CEUs

Non-Mandatory Cont. Ed.

This seminar is open to the public and offers up to 6.5 HSW continuing education hours to architects and 6.5 PDHs to professional engineers in all states. Educators and courses are not subject to preapproval in Iowa and neighboring states.

This seminar is approved by the American Institute of Architects for 6.5 HSW Learning Units (Sponsor No. J885).

HalfMoon Education is an approved continuing education sponsor for architects in Florida and is deemed an approved sponsor in New York. HalfMoon Education is an approved continuing education sponsor for engineers in Florida, Indiana, Louisiana, Maryland, New Jersey, New York (NYSED Sponsor No. 35), North Carolina, and North Dakota.

The Building Performance Institute has approved this event for 3.25 CEUs.

This event also offers a non-mandatory continuing education opportunity to contractors. It has not been reviewed by any state contractor licensing entity for course approval.

Attendance will be monitored, and attendance certificates will be available after the seminar for most individuals who complete the entire program. Attendance certificates not available at the seminar will be mailed to participants within fifteen business days.


Duane Crawford

Dakota Geo Consultant, LLC
Mr. Crawford is a consultant and contractor specializing in drilling, geothermal batteries, geothermal design and geothermal development. He has 40 years of experience in drilling, and over 23 years of experience in geothermal design and construction. He has designed and constructed horizontal and vertical ground heat exchangers, and his alternative designs include pond loop, single well pump-and-dump, thermal battery, and solar-assisted ground source heat pump configurations. He has designed and constructed geothermal systems in South Dakota, Nebraska, Iowa, Kansas, Missouri, Canada, and Grand Cayman in the Cayman Islands. Mr. Crawford has worked in the water development industry since 1976.