Can I export and share these results?

Yes, you can generate shareable state links, export clean CSV spreadsheets, or print high-resolution executive reports with a single click.

Is this calculator free to use?

Yes, all calculation engines on ToolsVault are 100% free with no account registration or paywall required.

Geothermal Ground Loop & Drilling

Geothermal Ground Loop Pipe Length & Thermally Enhanced Grout Calculator

Calculate vertical closed-loop geothermal ground heat exchanger borehole depth, HDPE U-bend pipe volume, bentonite thermally enhanced grout bags, and silica sand requirements.

Borehole Parameters

Total System HVAC Heat Pump Tonnage

Borehole Drilling Ratio (Linear Ft / Ton) Normal clay/sand: 180-220 ft/ton. Hard granite: 140-160 ft/ton.

Borehole Diameter (inches)

HDPE Loop Pipe Outer Diameter

Grout Thermal Conductivity Target

Total Borehole Drilling

-- LF

-- Holes

Total HDPE Loop Pipe

-- LF

2x borehole depth (Supply/Return)

Enhanced Grout Required

-- Bags

50-lb Bentonite bags

Materials & Antifreeze Volume Takeoff

Silica Sand Aggregate Mix

-- lbs

Provides thermal bridge to formation

Loop Water / Antifreeze Capacity

-- Gallons

Propylene glycol or ethanol flush volume

IGSHPA Best Practice Installation:

Thermally enhanced bentonite grout must be pressure-pumped through a tremie pipe from the bottom of the borehole upwards to prevent air voids. Air pockets create thermal barriers that cripple COP efficiency. Adding specialized silica sand achieves thermal conductivity between 0.88 and 1.20 Btu/hr·ft·°F.