Manual J load calculation
We measure square footage, insulation, window area, and duct sizing, then size the equipment to the house. This is the step that prevents the oversized, short-cycling systems we replace constantly in McLean.
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What our heat pump installation includes
Every installation starts with a load calculation and a written scope, and the price you approve is the price you pay. Here is what is standard on a McLean changeout, and what we quote separately when your house needs it.
New line set and pad
We run a new copper line set rather than reusing the old one, set the outdoor unit on a composite pad, and protect the lines with UV-rated insulation. Reusing old line sets is how contaminants get into a brand-new compressor.
Permit and inspection
We file the Fairfax County permit and meet the inspector on site. You get the signed-off inspection record for your files, which matters when you sell the house.
Deep vacuum and commissioning
We pull a deep vacuum with a vacuum pump and hold it to confirm the system is dry and leak-free, then charge by weight and verify superheat and subcooling with a manifold gauge set.
Thermostat setup and walkthrough
We install or configure your thermostat, program the schedule, and walk you through filter changes, defrost behavior, and emergency heat. You get the AHRI certificate and warranty registration by email.
Air Source Heat Pump Installation McLean VA explained
Air Source Heat Pump Installation McLean VA means removing the old condenser and air handler, running new line sets and a condensate drain line, and commissioning a matched outdoor unit and indoor coil so the system heats and cools from one compressor. We pull the Fairfax County permit, verify the electrical panel can carry the load, and pressure-test every braze joint with nitrogen before we charge the system with R-410A or R-32 refrigerant.
Most McLean homes we visit are 1960s to 1990s colonials and split-levels with original ductwork that leaks 20 to 30 percent of conditioned air. That is why an air source heat pump replacement McLean VA often includes duct sealing and a manual J load calculation, not just a box swap. If your current system is 12 to 15 years old and blowing cold air in heat mode, replacement usually beats another repair.
How our installation process works
Five steps, one crew, and a written scope before we touch a wrench. Here is exactly what happens from the first phone call to the day your new system runs.
01
Schedule
Call or book online — a real human picks up and confirms a 2-hour arrival window.
02
Diagnose
Licensed tech inspects on-site, then walks you through the cause and your options.
03
Fix
The job is completed to code and done right the first time — no shortcuts, no surprises.
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Guarantee
Every job backed by a written workmanship warranty — and we stand behind it.
Tools and methods we use on every job
Tools & Equipment
Manifold gauge set
Used to read suction and liquid pressures during charging, then confirm superheat and subcooling match the manufacturer's specification for the indoor and outdoor match.
Vacuum pump
Pulls the system down to a deep vacuum and holds it, which removes moisture and confirms the line set has no leaks before we open the refrigerant valves.
Refrigerant recovery machine
Recovers R-410A or R-32 refrigerant from the old system so it is handled legally under EPA Section 608 rules instead of vented to the atmosphere.
Clamp meter and multimeter
Measures amp draw and voltage on the compressor, blower motor, fan motor, capacitor, and contactor to confirm the electrical side is correct before startup.
Duct pressure gauge
Reads static pressure across the air handler and duct system so we can size the equipment to the actual ductwork instead of assuming it is adequate.
Fin comb and coil cleaning pump
Straightens bent condenser fins and flushes the coil so the new system starts with full airflow and rated capacity from day one.
Leak detection electronic detector
Sniffs braze joints, Schrader ports, and coil bends for refrigerant leaks during commissioning and on any warranty callback.
Methods & Standards
Manual J load calculation
We size equipment to the house using measured square footage, insulation, window area, and orientation. This is the single biggest difference between a system that lasts 15 years and one that short-cycles and fails in seven.
Nitrogen pressure test and deep vacuum
Before charging, we pressurize the line set with nitrogen to find leaks, then pull a deep vacuum and hold it. Skipping either step is how moisture and debris get into a new compressor.
AHRI-matched equipment pairing
We pair indoor and outdoor units from the same AHRI certificate so the rated efficiency, Energy Star status, and manufacturer warranty all stay valid. Mismatched equipment voids warranties and underperforms.
Fairfax County permit and inspection
Every changeout is permitted and inspected. We meet the inspector on site, correct anything they flag, and hand you the signed record so your file is clean when you sell.
When McLean homeowners call us
01
A 1970s colonial in McLean Central with original ductwork and a failing 15-year-old heat pump.
What we do: We run a manual J, seal the accessible duct leaks, and install a 3-ton cold-climate system with a matched air handler. The permit goes through Fairfax County, and we commission by measured superheat and subcooling.
→ The house holds temperature within one degree on both floors, and the first full winter runs 25 to 40 percent cheaper than the old system.
02
A homeowner in Salona Village whose heat pump died in January and needs heat now.
What we do: We come out same day, diagnose the compressor failure, and set up temporary heat. Within a week we install a replacement system sized to the house, with the permit and inspection handled in parallel.
→ They are never without heat for more than a day, and the new system comes with a full manufacturer warranty and AHRI certificate for the tax credit.
03
A Chesterbrook family finishing a basement and adding a conditioned garage office.
What we do: We calculate the added load, then install a ductless mini-split for the garage and upgrade the main system so it can carry the finished basement without short-cycling.
→ Both new spaces heat and cool independently, and the main system stops running constantly trying to serve square footage it was never sized for.
04
A homeowner in Country Club Hills replacing a gas furnace and AC with one all-electric heat pump.
What we do: We verify the electrical panel capacity, run a new circuit, and install a cold-climate heat pump with a matched coil. We cap the gas line and remove the old flue.
→ One system instead of two, one filter instead of two, and eligibility for federal tax credits plus Dominion Energy rebates.
How heat pump installation works in McLean
McLean sits in a mixed-humid climate with cold winters and humid summers, so an air source heat pump has to defrost properly in January and dehumidify in July. Most of the housing stock here dates from the 1960s through the 1990s, which means ductwork that was sized for a furnace and AC, not a modern variable-speed air handler. We see undersized returns in almost every split-level, and we see condensate drain lines that terminate somewhere they should not. That is why our HVAC air source heat pump installation McLean Virginia process starts with a load calculation and a duct inspection, not a catalog. We pull the Fairfax County permit, verify panel capacity, and commission by measured superheat and subcooling. If you are comparing air source heat pump system installation McLean options, ask each contractor whether they run a manual J and whether they pull a permit. The answer tells you most of what you need to know.
Neighborhoods We Serve
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Downtown McLean
Older homes close to the commercial core often have tight mechanical closets, so we measure the air handler footprint before ordering equipment.
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Langley Forest
Larger lots and longer line set runs, which means we pay extra attention to line sizing and insulation to protect capacity.
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Chesterbrook
Many homes here have finished basements, so condensate management and drain routing get planned before install day.
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West McLean
A mix of original 1960s ductwork and later additions, so duct sealing often delivers as much comfort gain as the new equipment.
Local Conditions We Plan For
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Winter design temperatures near 15 degrees Fahrenheit
Cold-climate heat pumps hold rated capacity at these temperatures, while standard units fall back to auxiliary heat. We size for the cold snap, not the average.
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Humid summers with long cooling seasons
Correct charge and airflow matter more here than almost anywhere. An overcharged system will not remove moisture, and the house feels clammy at 72 degrees.
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Aging ductwork in 1960s to 1990s housing stock
Leaky ducts can waste 20 to 30 percent of capacity. We seal and balance before commissioning so the new system performs to its rating.
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Fairfax County permitting and inspection requirements
Every changeout needs a permit and inspection. We handle the paperwork and meet the inspector so the job closes out cleanly.
1990s colonial, Chesterbrook
Problems a new heat pump solves in McLean
Most replacement calls start with one of these four complaints. If you recognize yours, the system is telling you it is near the end of its service life.
Problem
Heat pump blowing cold air in heat mode
You run auxiliary electric heat constantly, which can double your winter bill, and the house still never reaches the set temperature on a cold night.
Our Fix
We test the reversing valve, defrost control board, and refrigerant charge with a clamp meter and manifold gauge set. If the compressor or valve is failing on a system over 12 years old, we quote air source heat pump replacement McLean VA instead of another partial repair.
Problem
Frozen coil every cold snap
Ice builds on the outdoor unit, airflow stops, and the system shuts down on high pressure. Repeated freeze cycles stress the compressor and shorten its life.
Our Fix
Defrost failures usually trace to the control board, sensor, or a reversing valve that will not switch. We diagnose the sequence of operation and repair the failed part, or replace the system if the compressor has been damaged by repeated freeze-ups.
Problem
Upstairs rooms never comfortable
You adjust the thermostat to fix one floor and make the other worse. The real issue is duct leakage and pressure imbalance, not the equipment.
Our Fix
We measure static pressure with a duct pressure gauge, seal leaks with mastic and mesh, and balance registers. On many McLean jobs, duct work alone recovers 20 percent of lost capacity before we even discuss new equipment.
Problem
System 15 years old and costing more to run
Older R-22 systems lose efficiency every year, and parts get harder to find. You pay more each winter for less heat, and one major failure can cost a third of a new system.
Our Fix
We compare repair cost against replacement cost honestly. If the repair is more than a third of a new system on equipment over 12 years old, we recommend a new air source heat pump install McLean with a cold-climate model and a fresh warranty.
Why McLean homeowners upgrade to heat pumps
A properly sized air source heat pump moves heat instead of burning fuel, so it delivers two to three times the heating output per dollar of electricity. Here is what that looks like in a McLean house.
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Lower winter bills
A modern cold-climate unit holds rated capacity down to 5 degrees Fahrenheit, which covers every McLean cold snap we see. Homeowners replacing 15-year-old equipment commonly report 25 to 40 percent lower winter operating costs once duct leaks are sealed and the thermostat is programmed correctly.
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One system, year-round
Heating and cooling air source installation McLean combines both jobs in a single outdoor unit. You stop paying for a separate furnace and AC, you get one filter to change, and you get one warranty to track instead of two aging machines competing for the same closet space.
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Cleaner indoor air
We seal ductwork with mastic and mesh, then balance airflow room by room with a duct pressure gauge. That cuts the dust and pollen pulled in through return leaks, and it stops the pressure imbalance that makes upstairs bedrooms stuffy while the basement stays cold.
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Rebates and tax credits
Energy Star certified heat pumps qualify for federal tax credits and Dominion Energy efficiency rebates. We hand you the AHRI certificate with the model and serial numbers already filled in, so your paperwork goes through the first time instead of bouncing back for missing documentation.
What heat pump installation costs in McLean
Typical 2026 pricing for a full air source heat pump replacement McLean VA runs $6,500 to $14,500 installed, including equipment, line set, permit, and labor. A straightforward 3-ton changeout with usable ductwork sits near the low end. Cold-climate models, duct sealing, electrical upgrades, and second zones push toward the top. We give you a written range after the load calculation, and the price you approve is the price you pay.
Typical Investment Range
$6,500 - $14,500 installed, depending on size, equipment tier, and ductwork
A correctly sized, permitted, and commissioned heat pump lasts 15 years or more and cuts winter operating costs by 25 to 40 percent compared with aging equipment. The upfront price includes the load calculation, permit, and inspection, which is what separates a system that performs from one that just runs.
What changes the price
01
System size and tonnage
A 2-ton system costs less than a 5-ton system, and the load calculation decides which one your house actually needs. Oversizing costs more upfront and costs more to run, so we size to the measured load.
02
Equipment tier
Single-stage, two-stage, and variable-speed inverter systems sit at different price points. Variable-speed units cost more but hold capacity at low temperatures and run quieter, which matters in tight McLean lots.
03
Ductwork condition
If your ducts leak badly or the return is undersized, we quote sealing and balancing as part of the job. Skipping it means paying for capacity that never reaches the rooms.
04
Electrical upgrades
Some homes need a new circuit, disconnect, or panel work to carry the new equipment. We check panel capacity during the site visit so this is in the written scope, not a surprise.
05
Line set and pad
We run a new line set rather than reusing the old one, and we set the outdoor unit on a proper pad. Reusing old lines is a common shortcut that shortens compressor life.
06
Permit and inspection
The Fairfax County permit and inspection are part of the price. A contractor who skips the permit is saving money on your behalf and leaving you with an unpermitted installation.
Licensed, certified, and inspected
Licensed & Certified
- NATE certification — issued by North American Technician Excellence
- EPA Section 608 certification — issued by U.S. Environmental Protection Agency
- Virginia HVAC contractor license — issued by Virginia Department of Professional and Occupational Regulation
- Fairfax County permit and inspection — issued by Fairfax County
- AHRI certification — issued by Air-Conditioning, Heating, and Refrigeration Institute
Verified Reviews
Google ★★★★★4.9
They were the only company that ran a load calculation before quoting. Install took one day, they pulled the Fairfax County permit, and the inspector signed off first visit. The house heats evenly for the first time since we bought it.
Yelp ★★★★★4.8
Our heat pump died in January and they came out the same day. Compressor was gone, so they set up temporary heat and installed a new cold-climate unit within a week. Price matched the written quote exactly.
BBB ★★★★★4.9
Professional crew, clean work, and they explained the defrost cycle and filter changes before leaving. They emailed the AHRI certificate for the tax credit without me having to ask twice.
Heat pump installation expertise you can check
Our technicians hold NATE certification and EPA Section 608 certification, and we work under a Virginia HVAC contractor license with Fairfax County permits pulled on every changeout. We install Carrier, Trane, Lennox, Mitsubishi Electric, Daikin, Bosch, Goodman, Rheem, American Standard, and Bryant equipment, so we are not locked into one brand's quirks. That range matters in McLean, where half the housing stock has ductwork that needs modification before a modern air handler will fit.
- NATE-certified technicians who commission every system by measured superheat and subcooling, not by guesswork
- EPA Section 608 certification for refrigerant handling, recovery, and charging on every job
- Virginia HVAC contractor license with Fairfax County permit and inspection on each installation
- AHRI-matched indoor and outdoor equipment so your Energy Star rating and warranty stay valid
- OSHA safety compliance on every site, including electrical lockout and refrigerant recovery procedures
What McLean homeowners say
Real experiences from customers who chose our Air Source Heat Pump Installation services.
“Our 1994 colonial had the original furnace and AC, and the upstairs was always 5 degrees warmer. They ran a load calculation, sealed the duct leaks in the attic, and installed a 3-ton cold-climate system. First January bill was $180 lower than the year before. The crew vacuumed the line set and showed me the readings before they left.”
D
David R.
Homeowner, Chesterbrook
“We got three quotes and theirs was the only one that included a manual J and a permit. Install took one day. They found a cracked drain pan during the changeout and replaced it instead of reinstalling the old one. Six months in, the system holds temperature within a degree and the defrost cycle is quiet.”
P
Priya S.
Homeowner, Langley Forest
“Our heat pump died on a Sunday in January. They came out the same day, confirmed the compressor was gone, and had a new unit installed within a week. They handled the Fairfax County inspection and emailed the AHRI certificate for the tax credit. No surprise charges, and the price matched the written quote.”
T
Tom W.
Homeowner, West McLean
Questions McLean homeowners ask before installing
Real answers to the questions we hear most often from local homeowners and property managers.
How much does air source heat pump installation cost in McLean VA?
Most full changeouts in McLean run $6,500 to $14,500 in 2026, including equipment, line set, permit, and labor. A straightforward 3-ton swap with existing ductwork sits near the low end. Cold-climate models, duct sealing, electrical upgrades, or a second zone push you toward the top. We give you a written range after the load calculation, not before.
How long does air source heat pump installation take in McLean?
A standard residential changeout takes six to nine hours, so it is a one-day job. Add a day if we are running new ductwork, adding a return, or upgrading the electrical panel. We schedule the Fairfax County inspection separately, usually within a few business days of completion, and the system runs the same evening we finish.
Who installs air source heat pump near me in McLean Virginia?
We do, and we are local. Our technicians hold NATE and EPA Section 608 certification and work under a Virginia HVAC contractor license. We install Carrier, Trane, Lennox, Mitsubishi Electric, Daikin, Bosch, Goodman, Rheem, American Standard, and Bryant systems, so we can match equipment to your ductwork instead of forcing one brand on every house.
Is air source heat pump installation available same-day in McLean?
Full installations are not same-day, but emergency heat restoration is. If your heat pump fails in January, we come out the same day, diagnose it, and get temporary heat running. If the compressor or reversing valve is gone, we quote a replacement and usually install within five to ten business days, faster if you are without heat.
Other heat pump services we handle
Heat Pump Repair
Repair keeps an existing system alive when the compressor, reversing valve, or control board still has life left. If your unit is under ten years old and the repair is under a third of replacement cost, we will tell you to fix it rather than sell you a new system.
View Heat Pump RepairHeat Pump Installation
Our general installation service covers conventional split systems and package units. It is the same crew and the same permit process, just without the air-source-specific sizing conversation about cold-climate performance and defrost behavior.
View Heat Pump InstallationHeat Pump Maintenance
Twice-a-year maintenance protects the investment you just made. We clean coils, check refrigerant charge with a manifold gauge set, test the capacitor and contactor, and clear the condensate drain line so your new system holds its efficiency instead of drifting down.
View Heat Pump MaintenanceEmergency Heat Pump Repair
When your heat dies on a 15-degree night in McLean, we run emergency calls. We diagnose fast, restore heat where possible, and if the compressor is gone we start the replacement quote the same visit so you are not waiting a week for answers.
View Emergency Heat Pump RepairHeat Pump Not Heating
A heat pump that runs but never warms the house usually has a reversing valve stuck, a failed defrost control board, or low refrigerant. We test all three with a clamp meter and electronic leak detector before recommending any part.
View Heat Pump Not HeatingHeat Pump Not Cooling
Cooling failures in McLean often trace to a dirty condenser coil, a failed capacitor, or a blower motor that has slowed down. We check airflow with a duct pressure gauge and verify the charge before we quote parts.
View Heat Pump Not CoolingContact McLean Heat Pump Pro Masters
Call 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.
McLean Heat Pump Pro Masters
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Phone
(571) 760-4593 -
Address
7321 Hooking Rd, McLean, VA 22101
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Hours
Mon–Fri: 7AM – 7PM
Sat: 8AM – 4PM
Sun: Emergency Only
24/7 Emergency Available