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Trenched Loop Fields

Horizontal Loop Installation in Denver

A sized, permitted loop field that meets your BTU load without overdigging your lot.

  • Load Calculation First
  • Written Estimate
  • Post-Install Check
Horizontal Loop Installation carried out by a professional geothermal heat pump installer

What Goes Wrong

The details that determine whether a horizontal loop actually performs

Generic Trench Footage

Using a national average instead of local soil data produces a loop field that is undersized for Denver’s Front Range soils.

Soil-Specific Sizing

We factor measured local thermal conductivity into the calculation, not a one-size figure pulled from a handbook.

Altitude Ignored

Heat pump output drops at Denver’s elevation; a system sized at sea-level BTU figures will fall short on the coldest nights.

Altitude-Adjusted Load

Every load calculation is adjusted for Denver’s elevation before trench footage or equipment is specified.

Undefined Dig Scope

Vague trench plans leave landscaping damage as a surprise; homeowners discover the full footprint only after excavation starts.

Mapped Disruption Area

The written estimate maps exactly which areas will be trenched so you know the landscaping impact before work begins.

Wrong Freeze Fluid

Incorrect antifreeze concentration in Colorado’s climate risks loop damage during hard freezes, voiding equipment warranties.

Specified Fluid & Concentration

The estimate lists freeze protection fluid type and concentration matched to local minimum temperatures, not a default mix.

Trenched Loop Fields

Horizontal loop installation sized to your lot and BTU load

Horizontal trenching costs less per foot than vertical boring, but the land area required has to match your system’s BTU demand.

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A horizontal loop field exchanges heat with soil at 4-6 feet depth, where ground temperature stays stable year-round. The total trench footage required is a direct function of your home’s BTU load and the thermal conductivity of your soil, both are calculated before a trench plan is drawn.

Colorado’s Front Range soils vary significantly in thermal conductivity. Clay-heavy soils transfer heat more efficiently than sandy or gravelly soils, which affects how much trench footage is needed to meet your load. We factor local soil data into the sizing calculation, not a national average.

The written estimate lists trench footage, pipe specification, freeze protection fluid type and concentration, backfill requirements, and permitting costs for your county. Landscaping disruption is mapped in the scope so you know which areas will be affected before the installer mobilises.

Why Choose Us

Why Denver Geothermal for horizontal loop installation?

Every step from first enquiry to post-install check is documented, so nothing about the scope or cost comes as a surprise.

Evaluation Before Commitment

Every enquiry starts with a load assessment and altitude-adjusted sizing before any installer is booked or cost is committed.

Itemised Written Estimate

The estimate lists every line item: trench footage, pipe spec, fluid type, backfill, and county permitting fees.

Licensed Local Installers

We arrange licensed installers familiar with Front Range soil conditions and Jefferson, Arapahoe, and Denver county permit requirements.

Post-Install Performance Check

After installation, the system output is verified against the specified BTU capacity before the job is signed off.

A completed geothermal heat pump installation job at a house
A finished geothermal heat pump installation project

The Process

From first enquiry to a running loop field

Request an Evaluation

  1. 01

    Request an Evaluation

    Tell us about your property and we arrange an altitude-adjusted load calculation and soil assessment for your specific lot.

  2. 02

    Review Your Written Estimate

    You receive an itemised estimate covering trench footage, pipe spec, freeze fluid, backfill, permitting, and the disruption map.

  3. 03

    Install & Confirm Output

    A licensed installer completes the trench work and a post-install check confirms the system meets the specified BTU output.

Pricing Estimates

Typical Horizontal Loop Installation Prices

JobTypical cost
Small horizontal loop install$12,000-$18,000
Typical horizontal loop installation$15,000-$25,000
Large horizontal loop field$22,000-$35,000
These prices are estimates and often vary with the condition, size and scope of each job. Message or call us for a free, no-obligation quote.
See all prices

Common Questions

Horizontal loop installation: questions we hear most

How deep do horizontal loop trenches need to be?

Trenches are typically dug 4 to 6 feet deep. That depth keeps the pipe below Colorado’s frost line and in soil with a stable year-round temperature, which is what drives heat exchange efficiency. The exact depth is confirmed during the site assessment based on local soil conditions and the trench layout design.

How much yard space does a horizontal loop require?

The loop field needs enough open, unobstructed yard for parallel trench runs. A typical single-family home requires several hundred to over a thousand linear feet of pipe, spread across multiple trenches. The sizing calculation done at assessment confirms whether your lot can accommodate the required layout.

What happens if the loop is not sized correctly?

An undersized loop field forces the heat pump to work harder than its design load, which raises energy use and shortens equipment life. Skipping the load calculation is the most common cause of underperforming systems. The written estimate is only issued after the sizing calculation is complete.

Will my yard recover after the trenching?

Yes. Backfill is compacted in lifts to reduce settling, and the surface is graded and seeded or sodded as part of the installation scope. Most yards show little visible trace of the trench within one growing season, though some settling in the first year is normal.

Is there a federal tax credit for this type of installation?

Colorado homeowners may claim the 30% federal residential clean energy tax credit on qualifying heat pump loop installations through 2032. Consult a tax advisor to confirm eligibility for your specific project, as credit rules can change and depend on how the system is classified.

What does the pressure test confirm?

The assembled loop is pressurized and held at test pressure before backfill begins. If pressure holds steady, the loop is leak-free. If it drops, the leak is located and repaired above ground, far less costly than finding a fault after the trench is filled.

More questions about Horizontal Loop Installation?

Arrange Your Geothermal System Evaluation

Tell us about the property and we’ll arrange a licensed installer to assess the site and deliver a written scope before anything is booked.

Request an Evaluation