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🌱 Commercial Decarbonization Partner · Middlesex County

Geothermal Borehole Drilling & Heat Pumps in Lexington, MA

Leading ground-source drilling contractor in Lexington. Accelerating compliance with the Municipal Specialized Energy Code for custom homes, schools & estates.

Commercial Subcontractor SpecsπŸ“ž 1-800-339-9051
Subsurface Physics & Feasibility

Lexington Geological & Thermal Profile

Ground-source borehole parameters based on GDNE test wells and local New England rock formations.

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Bedrock Formation
Dedham Granodiorite & Bloody Bluff Fault Zone

Primary bedrock strata for borehole heat exchange.

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Thermal Conductivity
1.65 – 1.95 BTU/(hrΒ·ftΒ·Β°F)

Rock heat transfer capacity measured via in-situ 48-hr TRT testing.

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Average Borehole Depth
400 – 600 ft per closed-loop borehole

Precision depth tailored to urban footprint and heating/cooling loads.

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Undisturbed Ground Temp
51.5Β°F baseline

Constant year-round baseline ensuring 400%+ coefficient of performance.

Municipal Decarbonization Mandate

Lexington Specialized Energy Code: Opted into the strictest Mass. Stretch Code requiring all new residential and commercial construction to be all-electric or zero-energy ready.

Permitting & Regulatory Agencies: Lexington Board of Health, Lexington Building Department, and MassDEP.

Rebates & Federal Tax Credits

  • βœ“Mass Save: Mass Save Whole-Home Rebates ($15,000–$25,000) + 0% Mass Save HEAT Loan up to $25,000.
  • βœ“Federal Section 48 / 25D: 30% Residential Clean Energy Credit (Section 25D) with zero expenditure caps.
  • βœ“Urban Logistics: Quiet acoustic rig technology, lawn protection track mats, and precision GPS borefield layout.
Preliminary Engineering Sizer

Borefield Budget & Rebate Simulator for Lexington

Select building scale to model turnkey borehole capital requirements, Mass Save incentives, and 30% tax credits.

Thermal Capacity
50 Tons Peak
Est. Boreholes
~40 Boreholes
Mass Save Rebate
-$225,000
30% Section 48 ITC
-$72,000
Est. Net Borefield Investment (Lexington)
$0
Gross $240,000 offset by $225,000 Mass Save and $72,000 Federal Credit. Est. annual utility savings: $57,500/yr.
Lexington Project Spotlight

Net-Zero Custom Estate Borefield

Location: Follen Hill, Lexington Β· Capacity: 12 Tons Β· Array: 4 x 450 ft Vertical Closed Loops

Installed 4 deep vertical boreholes piped through exterior header trench into dual WaterFurnace 7 Series heat pumps, achieving 100% fossil-free heating, cooling, and hot water.

Borefield Configuration: Closed-Loop Geothermal Array with High-Conductivity Grout
Commercial Engineering FAQs

Frequently Asked Questions in Lexington, MA

Consult on Your Lexington Geothermal Project

Connect directly with GDNE’s licensed drilling engineers for early-stage test borehole sizing, ASHRAE TRT execution, and Mass Save rebate coordination.

πŸ“ž Call 1-800-339-9051
πŸ“ž Call Us Now