Every geothermal installation we perform in McLean includes the full scope: load calculation, loop design, permitting, drilling or trenching, indoor unit, controls, and commissioning. If your ductwork needs sealing or your electrical panel needs an upgrade, we quote that separately before we start so there is no surprise on the invoice.
Room-by-room heat loss and heat gain calculation that determines the exact tonnage and loop length your McLean home needs. This is the foundation of the whole job. Skip it and you get a system that short-cycles in mild weather and cannot keep up in January.
Vertical boreholes 150 to 300 feet deep or horizontal trenches 4 to 6 feet down, designed around your lot. We grout, fuse, and pressure-test every circuit at 100 psi before backfilling. The loop is the part you never see, so we build it to last 50 years.
A Carrier, Trane, Lennox, Bosch, or Daikin water-source heat pump sized to your load, set on a vibration pad, and connected to the loop manifold. We evacuate to 500 microns and charge by weight, not by gauge feel.
New or recalibrated thermostat, wired and configured for geothermal staging. We verify heat, cool, fan-only, and emergency heat modes, and we set the airflow to match your ductwork. You get a walkthrough before we leave.
We pull the permit, schedule the inspection, and meet the inspector on site. You get the signed-off paperwork for your records. This matters at resale and for any warranty claim down the road.
We log loop entering and leaving water temperatures, airflow at each register, and refrigerant charge. Both the loop warranty and the equipment warranty get registered in your name. You keep a copy of everything.
Geothermal Heat Pump Installation McLean VA is the process of burying a closed-loop ground exchanger, tying it to an indoor water-source heat pump, and commissioning the whole system so it heats and cools your house off the stable 55-degree ground temperature under your yard. We bore vertical loops when the lot is tight and trench horizontal loops when there is room, then flush, pressure-test, and purge every circuit before we charge the system with R-410A or R-32 refrigerant. Nothing gets buttoned up until the manifold gauge set holds steady.
Most McLean calls start the same way: a 15-to-20-year-old air-source unit that cannot keep up in a January cold snap, or a homeowner comparing geothermal heat pump replacement McLean VA against another round of conventional equipment. The math favors ground-source here. Fairfax County lots are large enough for loops, the soil holds heat well, and the 22046 and 22101 ZIP codes see enough winter degree-days that a geothermal system's 3.5-to-4.5 COP beats any air-source alternative. We walk the yard, check the panel, and tell you straight whether geothermal is the right call.
Every job follows the same five stages. You will know what is happening, who is on site, and what comes next - no mystery, no waiting around for a callback.
Schedule
Call or book online — a real human picks up and confirms a 2-hour arrival window.
Diagnose
Licensed tech inspects on-site, then walks you through the cause and your options.
Fix
The job is completed to code and done right the first time — no shortcuts, no surprises.
Guarantee
Every job backed by a written workmanship warranty — and we stand behind it.
Manifold Gauge Set
Reads high-side and low-side refrigerant pressures during evacuation, charging, and leak diagnosis. We do not charge by feel; the gauges tell us exactly where the system sits.
Vacuum Pump
Pulls the system down to 500 microns before charging. Moisture left in the lines turns to acid and kills compressors. This step is non-negotiable on every install.
Refrigerant Recovery Machine
Recovers R-410A or R-32 refrigerant safely during repairs or unit replacement, per EPA Section 608 rules. Nothing gets vented to atmosphere on our watch.
Duct Pressure Gauge
Measures static pressure and airflow at each register. We use it to confirm the ductwork can move the CFM the new geothermal unit needs before we commission the system.
Electronic Leak Detector
Finds refrigerant leaks at flare fittings, brazed joints, and coil ends. We locate the leak before we recharge, so the fix actually holds.
Clamp Meter and Multimeter
Tests capacitors, contactors, blower motors, and control boards. These two tools diagnose most electrical faults on the first visit.
Thermostat Calibration Tool
Verifies the thermostat reads and calls for the correct temperature. A thermostat that is 4 degrees off will short-cycle a geothermal system and waste the efficiency you paid for.
Manual J Load Calculation
A room-by-room calculation of heat loss and heat gain using window area, insulation values, and local design temperatures. It determines the exact tonnage and loop length. We never size a geothermal system by square footage alone.
AHRI-Certified Equipment Matching
We pair the indoor unit, loop pump, and controls into an AHRI-certified matched system. That certification is what makes the federal tax credit and manufacturer warranty valid. Mismatched components void both.
Pressure Testing at 100 PSI
Every loop circuit is pressure-tested at 100 psi and held before backfilling. A leak in a buried loop is expensive to find later, so we prove it holds while the trench is still open.
Commissioning with Logged Data
We log loop entering and leaving water temperatures, refrigerant pressures, and airflow at each register. You get the numbers in writing. If efficiency drops in year five, we have a baseline to compare against.
01
What we do: We run the load calculation, design a vertical loop field for your lot, and install a new water-source unit with a 10-year parts warranty. The federal tax credit and Virginia rebates offset 30 to 40 percent of the upfront cost.
→ Heating and cooling costs drop 30 to 60 percent, and the equipment lasts 25 years instead of 12. The payback lands inside 6 to 10 years for most McLean homes.
02
What we do: We coordinate with your builder to place the loop field under the driveway or lawn before grading. The indoor unit goes in during mechanical rough-in, and we commission the system before you move in.
→ The loop is invisible, the yard is undisturbed after construction, and you start day one with a system that will outlast the mortgage.
03
What we do: We quote both options side by side, with real numbers: equipment cost, loop cost, permit, tax credit, and projected monthly savings. You see the break-even year before you decide.
→ You make the call with actual math instead of a sales pitch. If air-source is the better fit for your lot or budget, we tell you that and install it.
04
What we do: A horizontal loop field costs less to install than vertical bores when you have the yard for it. We trench 4 to 6 feet down, fuse the HDPE pipe, and pressure-test every circuit before backfilling.
→ Lower install cost and the same 3.5-to-4.5 COP. Your heating and cooling bills drop to a fraction of what an air-source system would cost on the same square footage.
McLean sits on clay-heavy soil with pockets of rock, which affects how we drill vertical loops and how deep we can trench horizontal ones. Lots in Chesterbrook and Old Chesterbrook tend to be tighter, so vertical bores are usually the right call. Properties in Salona Village, Potomac Hills, and West McLean often have the acreage for horizontal loops, which brings the install cost down. Fairfax County requires a permit for geothermal loop fields, and we pull it on every job. Virginia's freeze-thaw winters mean the ground loop has to be grouted correctly to protect the borehole and maintain heat transfer. We design for the 99 percent heating design temperature for this climate, not a national average. If you are comparing HVAC geothermal heat pump installation McLean Virginia options, ask each contractor for the loop design and the load calculation. If they cannot show you both, they are guessing. We also handle the utility locates and coordinate with Dominion Energy when the loop field crosses a service line.
Chesterbrook
Tighter lots and mature landscaping mean vertical loops are usually the practical choice. We use a compact rig to fit through side yards without taking out trees.
Salona Village
Larger parcels here often support horizontal loop fields, which lowers the install cost. We trench 4 to 6 feet down and restore the lawn with seed and straw.
Langley Forest
Larger homes with higher heating loads need more loop length. We size the field to the Manual J result, not to the square footage, so the system holds temperature on the coldest nights.
Country Club Hills
Established neighborhood with a mix of lot sizes. We assess each property individually because two houses on the same street can need different loop designs.
West McLean
More acreage means horizontal loops are often viable, and we can place the field away from septic systems and drain fields. Utility locates are critical here.
Clay-heavy soil with rock pockets
Slows vertical drilling and can require a different bit. We build the extra time into the schedule so the job does not run over.
Freeze-thaw winters with wet soil
Proper grouting is essential to protect the borehole and maintain heat transfer. We use a thermally enhanced grout that meets Virginia code.
Fairfax County permit and inspection requirements
Adds 1 to 2 weeks to the front end of the project for plan review. We start the permit process the day you sign so it does not delay the install.
Mature trees and landscaping
Limits where we can trench or drill. We mark the bore path with you before we start and use a compact rig when access is tight.
Most McLean homeowners call us because their current system is failing in one of these ways. Geothermal installation fixes the root cause instead of patching the symptom.
Problem
You wake up to a cold house, the auxiliary heat strips run constantly, and your electric bill spikes. Air-source capacity drops exactly when you need it most.
Our Fix
A geothermal system draws from 55-degree ground water, so capacity stays steady no matter how cold the air gets. We size the loop and unit to your load calculation, which means no more aux-heat spikes and no more cold mornings in McLean.
Problem
A failed defrost cycle lets ice build on the coil until airflow stops and the compressor overheats. Left alone, it takes out the compressor.
Our Fix
Geothermal systems have no outdoor coil to freeze. The ground loop stays above freezing year-round, so there is no defrost cycle to fail. That eliminates one of the most common winter repairs we run on air-source systems in Fairfax County.
Problem
An aging air-source heat pump loses efficiency as the compressor wears and the refrigerant charge drifts. You pay more each year for less heat.
Our Fix
A new geothermal heat pump installation McLean VA delivers a 3.5-to-4.5 COP, compared to 1.5-to-2.5 for an aging air-source unit. Most of our customers see heating costs drop 30 to 60 percent in the first full winter after installation.
Problem
A compressor cycling on and off outside the bedroom or patio makes the yard unusable in summer and keeps you awake in winter.
Our Fix
The geothermal unit sits inside, and the loop field is silent. There is no outdoor fan, no compressor hum, no defrost whoosh. Homeowners in Salona Village and The Reserve tell us the quiet is the first thing they notice.
A ground-source heat pump moves heat instead of burning fuel to make it. That single fact drives every number below - lower bills, longer equipment life, and a house that stays comfortable when the outdoor unit would normally be struggling.
Lower Operating Costs
A correctly sized geothermal system in McLean typically cuts heating and cooling costs 30 to 60 percent versus an air-source heat pump or resistance furnace. The compressor runs less because the ground loop delivers 55-degree source water year-round, so the unit holds a steady 3.5-to-4.5 COP instead of dropping toward 1.0 on a 15-degree night.
25-Year Equipment Life
The indoor unit sits inside, out of the weather, so there is no fan motor fighting ice, no frozen coil from a failed defrost cycle, and no condenser pad sinking into the yard. Ground loops are warrantied for 50 years. That is why geothermal heat pump replacement McLean VA is a once-in-a-homeownership decision, not a every-12-years one.
Quiet, Steady Comfort
No outdoor compressor cycling on and off outside the bedroom window. A geothermal unit runs in longer, gentler cycles, which means fewer temperature swings between rooms and no cold-air blast when the reversing valve shifts. Homeowners in Langley Forest and Country Club Hills notice the difference in the first week.
Rebates and Tax Credits
Energy Star-rated geothermal equipment qualifies for the federal tax credit plus Virginia utility incentives, and we document AHRI certification so your paperwork is clean. Between the credit and the monthly savings, most McLean homeowners see the premium over air-source equipment paid back inside 6 to 10 years.
Typical 2026 pricing for geothermal heat pump installation in McLean runs $18,000 to $35,000 before incentives. That range covers the loop field, indoor unit, controls, permit, and commissioning. Vertical loops cost more to drill than horizontal loops, and larger homes need more tonnage and more loop length. The federal tax credit covers 30 percent of the total, and Virginia utility rebates can add $1,500 to $3,000. We give you a written number after the load calculation and lot assessment, so you know exactly what you are paying for. No hidden line items, no change orders mid-job.
Typical Investment Range
$18,000 - $35,000 before incentives, depending on loop type, tonnage, and ductwork
A geothermal system costs more upfront than an air-source replacement, but it lasts 25 years instead of 12 and cuts heating and cooling costs 30 to 60 percent. With the federal tax credit and Virginia rebates, most McLean homeowners break even inside 6 to 10 years and then pocket the savings for the next 15.
What changes the price
Loop Type and Length
Vertical bores cost more per ton than horizontal trenches because of drilling equipment and depth. A 3-ton home might need 600 feet of vertical loop or 1,200 feet of horizontal loop. Lot size and soil conditions determine which is possible.
System Tonnage
A 2,000-square-foot McLean home typically needs 3 to 4 tons. Larger homes in Langley Forest or The Reserve may need 5 tons or more, which drives up both equipment and loop cost. The Manual J calculation sets the number.
Ductwork Condition
If your existing ducts leak or are undersized, we seal and balance them before commissioning. Ductwork and airflow balancing adds $1,500 to $4,000 depending on scope, but skipping it wastes the efficiency you paid for.
Electrical Panel Capacity
A geothermal unit may need a dedicated circuit or a panel upgrade. We check available capacity during the assessment and quote any electrical work upfront. Most McLean homes have enough capacity.
Permits and Inspections
Fairfax County permit fees and inspection costs are included in our quote. We pull the permit, meet the inspector, and hand you the signed-off paperwork. No surprise fees later.
Incentives and Rebates
The 30 percent federal tax credit applies to the full installed cost, and Virginia utility rebates stack on top. We document AHRI certification so your filing is clean. Most homeowners see $6,000 to $12,000 back.
Google ★★★★★4.9
McLean Heat Pump Pro Masters installed our geothermal system in Chesterbrook. They ran a load calculation before quoting, pulled the Fairfax County permit, and walked us through the thermostat and filter schedule. The crew was on time every day and cleaned up before they left. Our winter electric bill dropped by more than half.
Yelp ★★★★★5.0
We got three quotes for geothermal and this was the only company that showed us the loop design and the Manual J numbers. The install took five days, and they set up a temporary heater so we were not cold while the loop field was being drilled. Honest pricing and no surprises.
BBB ★★★★★4.8
Our old heat pump died in January. Instead of pushing a quick repair, they walked us through geothermal replacement and showed us the break-even math with the tax credit. The new system is quiet, the house holds temperature, and the paperwork for the rebate was handled for us.
Google ★★★★★4.9
They installed a horizontal loop in our West McLean yard and restored the lawn before they left. The technician explained the loop pressure and refrigerant charge in plain language and gave us the commissioning data in writing. Two winters in and the system has not skipped a beat.
Our technicians hold NATE certification and EPA Section 608 certification, and we carry a Virginia HVAC contractor license. We work on Carrier, Trane, Lennox, Mitsubishi Electric, Daikin, Bosch, Goodman, Rheem, American Standard, and Bryant equipment, so we are not locked into one brand's parts chain. Every install is permitted through Fairfax County and inspected before we close the trench. We have commissioned ground-source systems in tight Chesterbrook lots and on multi-acre Salona Village properties, and we know how Virginia's clay-and-rock soil behaves when a rig hits it.
Real experiences from customers who chose our Geothermal Heat Pump Installation services.
“We had quotes from three companies for geothermal. McLean Heat Pump Pro Masters was the only one who actually ran a load calculation before giving us a number. The crew drilled four vertical loops in two days, and the indoor unit went in the third day. Our January electric bill dropped by $180 compared to the old air-source system. Clean work, and they left the yard looking better than they found it.”
David R.
Homeowner, Chesterbrook
“Our 18-year-old heat pump finally quit in a cold snap. We decided to go geothermal instead of replacing it with another air-source unit. The team handled the Fairfax County permit, the utility locates, everything. They even set up a temporary heater so we were not freezing while the loop field was being drilled. Six days from start to finish, and the house has never been more comfortable.”
Susan M.
Homeowner, Langley Forest
“I was worried about the yard getting torn up, but the horizontal loop trench was backfilled and seeded before they left. The technician walked me through the thermostat, the filter schedule, and the warranty registration. He also showed me the AHRI certificate so I could file the federal tax credit without guessing. Honest pricing and no surprises on the final invoice.”
James K.
Homeowner, Country Club Hills
Real answers to the questions we hear most often from local homeowners and property managers.
When your existing heat pump stops heating or cooling, we diagnose the reversing valve, compressor, or control board and get it running. Many McLean homeowners call us for repair first, then decide whether geothermal replacement makes more financial sense.
View Heat Pump RepairAir-source heat pump installation for McLean homes where a ground loop is not practical. We size, permit, and commission the system the same way we do geothermal, with a Manual J load calculation and code-correct ductwork.
View Heat Pump InstallationAnnual service keeps your geothermal or air-source system at peak efficiency. We clean coils, check refrigerant charge, test capacitors and contactors, and verify the defrost cycle before winter. A maintained system holds its COP and avoids mid-January breakdowns.
View Heat Pump MaintenanceNo heat at 2 a.m. in January is an emergency in McLean. We run 24/7 emergency calls for heat pump not heating and heat pump blowing cold air in heat mode, with priority dispatch for homes with infants, elderly residents, or medical equipment.
View Emergency Heat Pump RepairA heat pump that runs but never warms the house usually has a failed reversing valve, a bad defrost control board, or low refrigerant. We test each component with a multimeter and clamp meter, find the fault, and repair it the same visit when parts allow.
View Heat Pump Not HeatingWhen your heat pump blows warm air in July, the culprit is often a capacitor, contactor, or refrigerant leak. We recover refrigerant with a recovery machine, pressure-test the circuit, and repair the leak before recharging to factory weight.
View Heat Pump Not CoolingCall us any time at (571) 760-4593 for heat pump repair in McLean, Virginia. We answer live 24/7, book same-day appointments, and dispatch emergency calls across Fairfax County. You can also email [email protected] or stop by the shop during regular hours.
Phone
(571) 760-4593Address
7321 Hooking Rd, McLean, VA 22101
Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available
