Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
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AfterFast, Reliable AC Installation Across Seattle
A new AC installation in Seattle typically costs $4,130-$8,850 and requires careful planning around your home’s existing electrical and ductwork. Most installations are scheduled within a week of your estimate, with our AC Installation team dispatching from our Seattle office to neighborhoods throughout the metro.
We’re familiar with the quirks of Seattle’s housing stock, from the Craftsman bungalows of Ballard and Wallingford to the mid-century ramblers near Northgate. Our technicians know that installing cooling in this city is rarely a simple swap. Many Seattle homes were built before air conditioning existed as a residential option, which means we often start from scratch: load calculations, electrical assessments, and ductless designs that respect the original architecture. If you’re ready to talk through what your home needs, call (817) 402-2972. Estimates are free, and you’ll get a written price before any work begins.
Why Coldharbour Heating & Air Is Seattle’s Preferred AC Installation Company
We’ve been part of the Seattle HVAC landscape since 2003, operating as an independently owned member of the Kingswell network. That structure matters because it means we follow The Kingswell Way: say the price before the work starts, show up in the window promised, leave the place cleaner than we found it, put every guarantee in writing, and come back if it fails.
Our 365-Day Done Right Promise applies to every repair we perform, and our upfront pricing policy means the written estimate you sign is the price you pay. No add-ons at the door. Our technicians are background-checked, uniformed, and trained on nine major brands including Goodman, Rheem, and Daikin. Phones are answered by a live person 24 hours a day, 7 days a week, because we know HVAC decisions don’t wait for business hours.
We serve Seattle from our local dispatch office, which means crews are already in the area when you call. Whether you’re in Queen Anne, Capitol Hill, or Fremont, we know the electrical panels, the permitting requirements, and the retrofit challenges specific to your neighborhood’s housing era.
AC Replacement in Seattle
AC Replacement in Seattle is often a misnomer. In most U.S. cities, this means pulling out an old condenser and sliding in a new one. In Seattle’s core neighborhoods, you’re frequently replacing something that was never there to begin with, or swapping out a window unit or portable system that served as a stopgap after the 2021 heat dome.
When we quote AC replacement in Seattle, we start with a Manual J load calculation to determine exactly how much cooling your home needs. This matters because an oversized system short-cycles, wastes energy, and fails to dehumidify properly, while an undersized one runs constantly and never catches up. Our typical AC replacement runs $4,130-$8,850, depending on whether we’re working with existing ductwork or designing a new distribution system.
Electrical Readiness Assessment
Before any equipment gets ordered, we inspect your electrical panel. Many Seattle homes still run on 100-amp service, which was plenty for 1940s living but insufficient for modern HVAC. If your panel needs upgrading, we include that as a line item in your written estimate so there are no surprises mid-project.
System Matching for Older Homes
We match equipment to your home’s physical reality, not to a catalog ideal. A Ballard bungalow with balloon framing and no insulation behaves differently than a 1980s Kirkland split-level. Our techs factor in wall construction, window quality, and solar gain when specifying equipment.
Central Air Conditioning Installation in Seattle
Central Air Conditioning Installation in Seattle makes sense when your home already has ductwork in place, typically from a gas furnace or Furnace Repair - Seattle work on a previous forced-air system. If you’re in a newer Seattle neighborhood like Northgate or parts of West Seattle where mid-century construction included ducts, central air can be the most cost-effective path to whole-home cooling.
The process starts with a duct inspection. Seattle’s damp climate can corrode metal ductwork over decades, and leaky ducts waste 20-30% of conditioned air before it reaches your rooms. We seal or replace compromised ductwork as part of the installation, then size the condenser and coil to work as a matched system. Central air installation in Seattle runs $4,130-$8,850, with existing ductwork landing at the lower end and full duct replacement pushing toward the higher figure.
Humidity Control Integration
Seattle’s marine climate means summers aren’t just warm, they’re sticky. We specify equipment with variable-speed blowers and proper thermostat controls that dehumidify without overcooling. This prevents the clammy feeling that cheap installations leave behind.
Quiet Operation Design
Seattle’s dense neighborhoods mean your condenser sits close to property lines and bedroom windows. We select equipment with low decibel ratings and position units to minimize noise transmission, because a system that keeps you cool but wakes you up isn’t done right.
Trusted Brands We Service in Seattle
Our technicians carry training certifications for Goodman, Rheem, York, and Daikin, and we also provide Carrier repair in Seattle through our relationships with local distributors to get parts quickly when summer demand spikes. Daikin has become a particular focus for our Seattle operation because their mini-split and multi-zone heat pump systems are purpose-built for the ductless retrofits that dominate this market. We stock common filters, capacitors, and control boards locally so a service call doesn’t turn into a two-week wait for a shipping container from the East Coast.
Common AC Installation Problems We See in Seattle Homes
- Rule-of-thumb sizing instead of load calculation. A technician walks into a Craftsman bungalow, glances at the square footage, and installs a system that’s wrong for the actual heat gain. We see upstairs bedrooms that never cool and main floors that freeze because no one measured wall insulation or window U-value.
- Skipped electrical upgrades on century-old panels. The new 18-SEER2 heat pump energizes, the homeowner celebrates, and then the main breaker trips every afternoon. We price panel upgrades as standard line items because they’re standard needs in Seattle’s pre-war housing stock.
- Poor humidity and filtration in tight retrofitted spaces. A mini-split cools the air but doesn’t move enough volume to filter properly or remove moisture. The result is clammy summers and aggravated allergies in homes that already battle Seattle’s year-round mold susceptibility.
- Inadequate commissioning after installation. The system runs, so the crew leaves. But static pressure, refrigerant charge, and thermostat calibration were never verified. Six months later, the homeowner has high bills and uneven temperatures that get blamed on the equipment instead of the installation.
Pricing for AC Installation in Seattle, WA
| Service | Price Range in Seattle |
|---|---|
| AC Installation (full system) | $4,130-$8,850 |
Your final price depends on four factors: whether your home needs electrical panel upgrades, whether ductwork exists or must be created, the efficiency tier you select (SEER2 ratings from 14.3 to 18+), and whether you choose cooling-only or a heat pump that also heats. Every estimate we provide is written, itemized, and fixed. The price on the paper is the price at completion. Call (817) 402-2972 to schedule your free estimate.
We Also Serve Cities Near Seattle
Our crews work throughout the metro, including AC Installation in Seattle proper as well as Medina, Bellevue, Mercer Island, and Kirkland. Each community has its own housing eras and permitting requirements, and we schedule accordingly.
Serving Seattle, WA - Our Local Coverage Area
We’re based in the Seattle area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About AC Installation in Seattle
Your 100-amp panel was designed for an era of minimal electrical demand: a few light bulbs, a radio, maybe a refrigerator. Modern HVAC equipment, especially heat pumps with auxiliary electric heat, can pull 30-50 amps on their own. A 200-amp panel provides safe headroom and is required by current electrical code for new HVAC circuits. We include this assessment in every estimate for pre-1940s Seattle homes. Call (817) 402-2972 and we’ll inspect your panel at no charge.
We use ductless mini-split technology with individual wall- or ceiling-mounted air handlers connected to a single outdoor condenser. Each zone gets its own thermostat, so your upstairs bedroom and main floor living room can maintain different temperatures. We perform room-by-room load calculations to size each air handler correctly, then select refrigerant line paths that minimize exterior wall penetration and preserve your home’s character. The result is zoned comfort without building soffits or chasing ducts through finished plaster.
SEER2 is the updated efficiency rating that reflects real-world conditions, including external static pressure that mimics actual ductwork. In Seattle’s mild summers, where systems run intermittently rather than constantly, a mid-tier SEER2 unit (15-16) often delivers better value than a premium model that won’t operate enough hours to justify its cost. We match efficiency tier to your actual usage patterns, not to a theoretical maximum.
Yes, and this is common in Wallingford, Queen Anne, and Capitol Hill. The radiators stay for heating, or we replace the boiler with a heat pump that handles both heating and cooling through new ductless distribution. We design around your existing hydronic system rather than tearing it out unnecessarily, which preserves your home’s original heating infrastructure while adding modern cooling where none existed.
We specify variable-speed equipment that runs longer cycles at lower capacity, which removes more moisture than short, blasts of cold air. In tight, retrofitted homes, we also assess ventilation needs because modern insulation can trap indoor humidity. Our installations include thermostat controls with dedicated dehumidification modes, not just temperature targets, because Seattle’s summer comfort depends on both. Call (817) 402-2972 to discuss your home’s specific moisture challenges.
Ready to get started? Call Coldharbour Heating & Air at (817) 402-2972 for your free, written estimate. We’ll assess your home’s electrical capacity, perform a full load calculation, and deliver an upfront price before any work begins. Every installation follows The Kingswell Way, and our 365-Day Done Right Promise means we come back and make it right if anything fails within the first year.
Written by Victor Mancini, Owner at Coldharbour Heating & Air, serving Seattle since 2003.