Manual J load calculation
We measure your home's windows, insulation, and duct runs and size the system to the real load. This is the step that prevents short cycling and humidity problems, and it is included on every quote, not sold as an extra.
Licensed, insured, and warrantied installs across Clackamas County
AC installation Milwaukie OR done right the first time
When you need AC installation Milwaukie OR homeowners can count on, our licensed techs handle everything from load calculations to final refrigerant charge. We install Carrier, Trane, Lennox, Goodman, and Mitsubishi Electric systems sized for your home, not a generic box. Whether you are replacing a 20-year-old unit or adding central air to a home that never had it, we get it running before the next heat wave.
Careful work. Honest options.
About this service
What AC installation Milwaukie OR really involves
AC installation Milwaukie OR is the full mechanical process of sizing, setting, and commissioning a new cooling system so it runs at its rated capacity for years. That means a Manual J load calculation, not a guess based on square footage. We run copper tubing, braze the line set, pull a deep vacuum with a vacuum pump, then charge the system by weight with R-410A refrigerant. Every install ends with a static pressure test and a temperature split check at the return and supply.
Most Milwaukie homes were built before 1990, and many still have undersized ductwork or a furnace that cannot handle a matched coil. If your AC not cooling complaints started last summer, a new AC unit Milwaukie homeowners buy should be matched to your existing furnace or air handler. We measure duct leakage, check the blower motor, and confirm your electrical panel can carry the new circuit before we quote a price.
- ✓ Lower summer power bills
- ✓ Rooms that actually cool
- ✓ Fewer breakdowns
- ✓ Quieter, cleaner air
What's included
What our AC installation package includes
Every install includes the equipment, labor, permit, and startup. We list what is covered so you can compare quotes apples to apples, and we flag anything that would be an add-on before you sign.
New line set and pad
We run new copper tubing, braze with nitrogen flowing, and set the condenser on a level pad. Reusing an old line set is a common shortcut that voids warranties and hides leaks. We replace it as standard practice.
Permit and inspection
We pull the mechanical permit through Clackamas County, meet the inspector, and leave the signed-off paperwork with you. That record matters at resale and keeps the install code-correct under Oregon rules.
Refrigerant charge by weight
We pull a deep vacuum to 500 microns, then charge R-410A by weight to the manufacturer's spec. We verify with manifold gauges and a clamp meter so the system runs at rated capacity, not a guess.
Thermostat setup and walkthrough
We wire and configure your thermostat, whether it is a basic programmable unit or a Nest or Ecobee. Then we show you the filter, the condensate cleanout, and the shutoff so you can handle the basics yourself.
Haul-away and recycling
We recover refrigerant from your old unit with a recovery machine, then haul the equipment away and recycle it. You are not left with a condenser on the side of the house or a refrigerant can in the garage.
How it works
How our AC installation process works
We ask about your home's age, square footage, existing furnace, and whether you have central air now. Ten minutes on the phone tells us if you need a full new AC unit Milwaukie install or a replacement coil. We book a same-week visit and confirm your ZIP, whether that is 97222 or 97269.
On site, we measure windows, insulation, and duct runs, then run a Manual J load calculation to size the system. We check your electrical panel for the new circuit and inspect ductwork for leakage. You get a written quote with equipment options, not a pressure pitch.
We set the condenser on a level pad, run new copper tubing and a PVC condensate line, and mount the indoor coil on your furnace or air handler. Line sets get brazed with nitrogen flowing, then pressure-tested to catch leaks before we charge the system.
A vacuum pump pulls the system down to 500 microns and holds it there. We then charge R-410A by weight to the manufacturer's spec, using manifold gauges and a clamp meter to verify amp draw. This is the step that separates a system that lasts 15 years from one that fails in three.
We check the temperature split, set the thermostat, and show you the filter location and condensate cleanout. You get the warranty paperwork and our number. If anything feels off in the first week, we come back at no charge.
STEP 01Phone assessment
We ask about your home's age, square footage, existing furnace, and whether you have central air now. Ten minutes on the phone tells us if you need a full new AC unit Milwaukie install or a replacement coil. We book a same-week visit and confirm your ZIP, whether that is 97222 or 97269.
Tools & methods
Tools and methods we bring to every install
Manifold gauges
Used to read high and low side pressures during charging and to verify the system is running at the manufacturer's target pressures after startup.
Vacuum pump and micron gauge
Pulls the line set and coil down to 500 microns to remove moisture and air. Skipping this step is the number one reason new systems fail early.
Recovery machine
Recovers R-410A and R-22 refrigerant from old equipment before haul-away, keeping us compliant with EPA Section 608 rules and keeping refrigerant out of the atmosphere.
Clamp meter and multimeter
Checks amp draw on the compressor and blower motor and verifies control voltage. High amp draw on a new install points to a wiring or capacitor problem we fix before leaving.
Leak detector
Electronic sniffing and pressure testing to find leaks in brazed joints and old line sets before we charge the system, so you are not paying for refrigerant twice.
Tube bender and fin comb
Bends copper tubing cleanly without kinking and straightens condenser fins after shipping or hail damage, protecting airflow and efficiency.
Real results
Before and after.
AC installation
1960s ranch in Linwood, window units to central air
A 1,450-square-foot ranch with four window units, a 100-amp panel, and original ductwork that leaked at every joint. Summer power bills ran $240 a month, and the back bedroom never got below 78 degrees.
After: We added a dedicated 240-volt circuit, sealed the accessible duct joints, and installed a 2.5-ton Carrier system with a matched coil. August bills dropped to about $150, and the back bedroom now holds 72 degrees.
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AC installation
Two-story in North Clackamas, hot upstairs fixed
A 2,300-square-foot home with a builder-grade 3-ton unit and one undersized return. Upstairs bedrooms ran 8 degrees warmer than the main floor, and the system cycled every 10 minutes on hot afternoons.
After: We added a second return upstairs, balanced the registers, and installed a variable-speed air handler with a 3.5-ton condenser. The upstairs gap closed to 2 degrees, and cycle times stretched to 25 minutes, cutting wear on the compressor.
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AC installation
Ardenwald emergency replacement during a heat wave
A 20-year-old Goodman condenser failed on a 98-degree Friday. The homeowner had a newborn in the house and called three companies before reaching us. The compressor was locked and the refrigerant had leaked out over the prior season.
After: We recovered the old refrigerant, hauled the unit away, and installed a new 3-ton Rheem system the next morning. By 2 p.m. the house was at 72 degrees. The new unit came with a 10-year parts warranty and a registered install.
Book this service → Problems we solve
Problems a new AC install solves for good
Most Milwaukie cooling complaints trace back to equipment that was the wrong size, installed with a shortcut, or simply worn out. Here is what we fix.
Ask a pro →AC not cooling on hot afternoons
We test the charge and compressor amps first. If the equipment is done, we quote a replacement sized by Manual J and charge it by weight. If a leak is the only issue, we repair the line set and recharge, which is often the cheaper path.
Frozen evaporator coil every summer
A frozen coil almost always means restricted airflow or a low charge. We check the air filter, blower motor, and duct static pressure, then find and fix the refrigerant leak. If the coil is damaged, we replace it as part of the install.
Clogged condensate drain and water damage
Every install gets a new PVC condensate line with a proper trap and cleanout. We show you how to flush it each spring, and we can add a float switch that shuts the system down before water ever reaches your drywall.
Duct leakage wasting half your cooling
We measure duct leakage during the quote and seal accessible joints with mastic and mesh. If the trunk lines are undersized, we resize them. Sealing ducts is often the cheapest way to make a new system feel stronger in every room.
Proof you can check
Licensed, certified, and reviewed
- NATE Certification · North American Technician Excellence
- EPA Section 608 · U.S. Environmental Protection Agency
- Oregon CCB License · Oregon Construction Contractors Board
- ACCA Standards Compliance · Air Conditioning Contractors of America
- OSHA Safety Compliance · Occupational Safety and Health Administration
Most full central air installations in Milwaukie run $4,800 to $9,500 in 2026, including equipment, labor, and permit. A simple replacement coil or single-zone ductless head can land under $3,500. Factors that move the number: system size, SEER2 rating, ductwork repairs, and whether your electrical panel needs a new circuit. We give you a written range before any work starts.
ThermexaPro installs air conditioners across Milwaukie and Clackamas County. Our techs are NATE-certified and EPA Section 608 certified, and we are licensed and insured in Oregon. We handle Carrier, Trane, Lennox, Goodman, Rheem, York, Mitsubishi Electric, and Daikin equipment. Call (855) 947-9500 and we will book a load calculation and quote for your home.
A standard central air install takes six to eight hours, so most homes are cooling by dinner. Ductless multi-zone jobs or full duct replacements can run two days. If your electrical panel needs an upgrade, add a day for the electrician. We tell you the expected timeline when we quote, and we do not leave a job half-finished overnight.
Size comes from a Manual J load calculation, not square footage alone. A 1,500-square-foot Milwaukie ranch with average insulation usually lands around 2 to 2.5 tons, while a 2,400-square-foot two-story with west-facing glass may need 3.5 tons. Oversizing causes short cycling and high humidity. We measure windows, insulation, and duct runs before recommending a tonnage.
Ready when you are
Get your AC installation Milwaukie OR quote today
We are licensed, insured, and warrantied, and we give you a written price before we start. Call (855) 947-9500 or book online and we will schedule your load calculation this week.
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Request an appointment
Contact ThermexaPro in Milwaukie
Call (855) 947-9500 any time, day or night, and a live dispatcher will get a tech headed your way. Regular office hours run 8 a.m. to 6 p.m. Monday through Friday, with 24/7 emergency coverage for no-heat and no-cool calls. You can also email [email protected] and we will reply the same business day.
Call anytime(855) 947-9500Email the office[email protected]
Office hoursOpen 24 hours · 7 days a week