How long does AC installation take?

For a standard residential AC replacement (existing infrastructure, no ductwork modifications): one full day (8-10 hours). For installations requiring electrical upgrade, line set replacement, or duct modifications: two days. For new construction or major retrofit such as AC-to-heat-pump conversion with electrical service upgrade: two to four days.

Do I need a permit for AC installation?

Yes. Every AHJ in our service area requires a mechanical permit for AC installation, ranging from $80 to $280 in residential permit fees. We pull every permit; we don't perform unpermitted work. Unpermitted HVAC installations can void homeowner's insurance, create disclosure problems on sale, and may violate manufacturer warranty requirements.

What if the AHJ inspector finds issues?

Our first-inspection pass rate across all AHJs in Salt Lake County is approximately 94.7%. When an inspector identifies an issue with our work, we correct it at no cost to the customer. When an inspector identifies pre-existing code violations not part of our scope, we provide a written description and quote for remediation as a separate change order.

Will the new equipment be louder or quieter than my old AC?

Significantly quieter. Modern AC condensers run at 56-72 dB depending on model and capacity, compared to 76-86 dB for 1990s and 2000s equipment. Variable-capacity inverter units (Carrier Infinity, Trane XV20i, Lennox SL28XCV) are the quietest, often at 56-62 dB — quieter than normal conversation.

What if I want to upgrade later (e.g., add a heat pump or smart thermostat)?

We design installations with future upgrade paths in mind. Standard practice: install a smart-thermostat-compatible control board even if you're starting with a basic thermostat; pull dual-fuel wiring even if you're only installing AC initially; size the electrical disconnect for one tier higher than the equipment installed, when budget permits. Discuss future plans during the in-home assessment.

AC Installation in Salt Lake County

August 3, 2025. A homeowner named Aaron M. on the bench above 4500 South in Federal Heights called us after getting three replacement quotes for his failed 1998 Carrier 38EZA condenser. The lowest bidder had walked through his 3,200 sq ft Tudor with a clipboard, said “you need a 4-ton replacement,” and quoted $7,800. The mid-bidder ran a quick room-by-room walkthrough using a tablet app, said “you need 3.5 tons,” and quoted $9,200. Neither contractor measured a single window, asked about attic insulation, or pulled up the building department’s parcel history to see what was permitted on the structure. Dakota Whitfield spent 2 hours and 15 minutes at Aaron’s house running a proper ACCA Manual J load calculation: actual cooling load was 28,400 BTU/hr at the 96°F design temperature. 2.5 tons, not 4. A 60% oversizing error on the lowest bid. We installed a Carrier 24VNA624 Infinity variable-capacity 2.5-ton heat pump (cooling capacity 28,800 BTU/hr at AHRI conditions) paired with a Carrier FE4ANF002 variable-speed air handler. Total: $11,400 net of $1,200 Rocky Mountain Power Wattsmart rebate and $2,000 federal IRA 25C credit. Aaron’s August 2025 electric bill came in $89 lower than August 2024 despite an objectively hotter month.

The story above isn’t unusual. Roughly 70% of the AC installation quotes Salt Lake Valley homeowners receive are based on rule-of-thumb sizing rather than measured load calculation. Roughly 40% of existing installed AC systems in our service area are oversized by at least one full ton. The reason is simple: properly sizing equipment requires 2-3 hours of measurement and analysis before quoting, which most contractors skip because it slows down their close rate. We don’t. Every cooling installation we touch begins with a measured Manual J. Below is how we approach the work, what equipment we install, what it costs, and what you should expect from the process.

How We Size AC Equipment

We use ACCA Manual J Eighth Edition load calculation software (Wrightsoft Right-J version 14, updated quarterly with current code adoptions). The calculation inputs include:

Outdoor design conditions for Salt Lake County:: 96°F dry bulb / 64°F wet bulb at the 1% summer design level (ASHRAE Climate Zone 5B for Salt Lake County, slightly cooler for bench properties above 4,800 ft elevation, slightly hotter for valley floor properties in West Valley and Magna). Altitude correction at 4,226 ft baseline: approximately 2.5% capacity derate per 1,000 ft, applied to manufacturer rated capacity.
Indoor design conditions:: 75°F indoor dry bulb / 50% relative humidity, with adjustment for occupant preferences (some customers run 72°F, some 78°F — this changes the sensible heat load).
Building envelope characteristics:: Square footage by floor, ceiling heights, wall construction (R-value), attic insulation (R-value), basement or crawl space conditioning, window dimensions and orientation, window U-factor and Solar Heat Gain Coefficient (SHGC) where known. We measure windows with a tape measure on-site; we don’t rely on county assessor records.
Infiltration rate:: For older homes (pre-1990): typically estimated at 0.50-0.80 ACH natural. For tighter newer construction (post-2015 with Energy Star certification): typically 0.20-0.35 ACH natural. If blower door test data is available (we offer blower door testing as a separate service), we use the measured ACH50 converted to natural infiltration via the LBNL formula.
Internal heat gains:: Occupant count, kitchen and laundry appliance usage patterns, lighting load (LED vs. incandescent), home office equipment (server racks, large monitor arrays). For homes with significant internal gains (commercial photographers, home-based food prep, server closets), we add the calculated load directly rather than using ACCA defaults.
Duct system characteristics:: Duct location (conditioned vs. unconditioned space), insulation level (R-4 to R-8), measured or estimated leakage rate. Ducts in unconditioned attics with poor sealing can add 15-30% to the cooling load through conductive and infiltration losses.

The Manual J output gives us the total sensible and latent cooling load in BTU/hr. We then run Manual S (equipment selection) to match available equipment to the calculated load with proper sensible/latent split for our dry climate, and Manual D (duct sizing) to verify that existing or proposed ductwork can deliver the airflow the new equipment requires.

What’s Different About R-454B

All AC equipment manufactured for sale in the United States after January 1, 2025 uses A2L-classified refrigerants — primarily R-454B — under the EPA’s AIM Act. The transition shifts us away from R-410A (which has a Global Warming Potential of 2,088) to refrigerants with GWP under 700. R-454B has a GWP of 466.

Practical implications for new installations:

Smaller refrigerant charge. R-454B equipment is designed with smaller refrigerant charge volumes than the R-410A predecessors, which reduces leak risk and the impact of any leak that does occur.
Tighter brazing tolerances. R-454B requires sealed and pressure-tested refrigerant connections to a higher standard than R-410A. We test every new install at 500 psig nitrogen for 60 minutes minimum, then pull a deep vacuum to 200 microns or below before refrigerant charging.
A2L classification (mildly flammable). R-454B is rated A2L by ASHRAE Standard 34. The ignition energy required to combust R-454B is dramatically higher than propane or other flammable refrigerants, and modern equipment is engineered with appropriate safety margins. In residential split-system installations, the practical safety risk is comparable to R-410A. Some equipment includes leak detection sensors in the indoor unit; we install per manufacturer specification.
Line set requirements. Existing R-410A line sets are typically reusable for R-454B retrofits because both refrigerants use similar oil chemistry (POE) and operating pressures. R-22 line sets (1990s-2000s installs) must be replaced when converting to R-454B because mineral-oil residue from R-22 will contaminate the new POE oil.
Technician certification. EPA Section 608 certification covers all refrigerants including A2L. We completed full R-454B transition training for every field technician during Q4 2024.

Equipment We Install for AC

Carrier (Carrier Factory Authorized Dealer since 2018)

Infinity 24VNA6 series — variable-speed inverter, up to 18 SEER2, Greenspeed platform, integrates with Infinity touchscreen control
Performance 24ACC6 series — two-stage, 17 SEER2 mid-tier
Comfort 24ABC6 series — single-stage, 14.3 SEER2 (federal minimum), reliable value tier

Trane (Trane Comfort Specialist since 2019)

XV20i — up to 22 SEER2, Climatuff variable-speed compressor modulating 25-100%
XR17 — two-stage, 17 SEER2
XR14 — single-stage, 14.3 SEER2

Lennox (Lennox Premier Dealer since 2017)

SL28XCV — up to 28 SEER2 (highest residential SEER2 currently available), variable-capacity, Quantum Coil
EL18XPV — variable-speed compressor at mid-tier price
EL16XC1 — single-stage, R-454B

Bryant, Rheem, Goodman, American Standard

Bryant Evolution (shared platform with Carrier Infinity), Rheem Prestige (top-tier with EcoNet integration), Goodman GSX140241 (value tier, common in rentals), American Standard Platinum (Trane shared platform). Full details on the brands we service page.

Installation Process — What to Expect

Day -10 to -5: In-home assessment. 45-75 minutes on-site. Manual J load calculation. Existing system evaluation (refrigerant, line set condition, electrical service, ductwork). Equipment selection discussion with the homeowner including AHRI matched-system references for the options under consideration. Written quote delivered within 48 business hours.
Day -5 to -3: Permit application and equipment ordering. Permit filed with the relevant AHJ. Equipment ordered from the manufacturer or distributor. Permit fees, equipment costs, and labor scheduled in our project management system.
Day 0 (install day morning): Pre-installation walkthrough. Homeowner walks the site with the lead technician. Existing equipment photographed. Work area protected with floor coverings and plastic sheeting. Power isolated at the disconnect.
Day 0 (mid-morning to early afternoon): Removal of existing equipment. Refrigerant recovered to EPA-compliant standards (manifest number documented). Old condenser, evaporator coil, and line set (if being replaced) removed. Old equipment loaded for recycling at Salt Lake County’s E-Waste facility or scrap dealer where applicable.
Day 0 (afternoon): Installation. New condenser set on pad (concrete or polypropylene, depending on site). New evaporator coil installed in air handler or furnace plenum. New line set run if existing isn’t being reused. Electrical connections per NEC 440 (proper disconnect within sight, correctly sized wire and breaker per nameplate). Condensate drain piped to approved termination point.
Day 0 (late afternoon): Commissioning. Nitrogen pressure test at 500 psig for 60 minutes. Vacuum pull to 200 microns or below. Refrigerant charge per manufacturer chart, weighed in by oz with line set length adjustment. Start-up sequence verified. Subcool and superheat measured against manufacturer target. Static pressure measured across air handler. CO check on any gas appliance in the equipment space.
Day 0 (end of day): Walkthrough and documentation. Homeowner shown all new equipment with model and serial numbers. Operating instructions reviewed. Filter location and replacement schedule explained. AHRI certificate, warranty documentation, and post-install measurement sheet delivered.
Day +1 to +3: Manufacturer warranty registration. Filed within 72 hours of commissioning. Customer receives confirmation by email.
Day +1 to +5: AHJ inspection coordination. Building inspector scheduled. Most jurisdictions complete inspection within 5 business days of work completion. We coordinate access; homeowner doesn’t need to be present unless required by AHJ.
Day +5 to +10: Rebate paperwork filed. Rocky Mountain Power Wattsmart application submitted (typically processed within 4-6 weeks). Dominion Energy ThermWise application submitted if applicable. Manufacturer-specific rebates filed where applicable.

Pricing Reference (Q2 2026)

Single-stage AC installation (2-3 ton, Tier 3):

$6,800-$8,400 (Goodman GSX140241, Amana ASX140241, Carrier Comfort, Trane XR14). Includes equipment, labor, permit, refrigerant, standard line set, warranty registration.

Two-stage AC installation (2-3 ton, Tier 2):

$8,400-$10,200 (Carrier Performance 24ACC6, Trane XR17, Lennox EL18XPV, Bryant Preferred 226ANV, Rheem Classic Plus RA17)

Variable-capacity AC installation (2-3 ton, Tier 1):

$10,200-$13,800 (Carrier Infinity 24VNA6, Trane XV20i, Lennox SL28XCV). Variable-speed delivers the best comfort and efficiency but costs more upfront. Payback through utility savings typically 8-14 years depending on usage patterns.

Heat pump installation (2-3 ton, replaces AC + adds heating):

$9,400-$15,800 gross. Net after rebates and tax credits typically $5,800-$11,200. See the heat pump installation page for details.

Common add-on costs (when applicable):

Concrete pad replacement: $185-$340
Line set replacement (R-22 → R-454B retrofit): $385-$840
Electrical disconnect upgrade: $245-$485 (if existing disconnect is undersized or non-code-compliant)
Ductwork modifications (Manual D-driven): $400-$1,800 depending on scope
Asbestos abatement on pre-1980 octopus ducts: $1,200-$3,500 through Western Insulation Asbestos or Apex Environmental (licensed subcontractor)
EPA 608 R-22 recovery from legacy equipment: $185 minimum + $4/lb of refrigerant recovered + manifest fee

Rebates and Tax Credits Available

Rocky Mountain Power Wattsmart:: Instant rebates on high-efficiency cooling equipment. AC: $50-$200 depending on SEER2 and ENERGY STAR certification. Variable-speed heat pump: $1,200. Smart thermostat: $50.
Dominion Energy ThermWise:: Mailed rebate check. Variable-speed AC: $200. Dual-fuel high-efficiency system: $600. Smart thermostat: $50. Typically arrives 6-10 weeks post-install.
Federal IRA 25C Energy Efficient Home Improvement Credit:: 30% of equipment cost up to $2,000 for heat pump installations (separate from the $1,200 furnace/water heater limit, so combined heat pump + furnace projects can claim up to $3,200 in the same tax year). Claimed on IRS Form 5695. We provide the manufacturer certification statement and your portion of the invoice broken out for tax purposes. Full financing breakdown including stacking strategy on the financing page.

Common AC Installation Concerns

How long does AC installation take?: For a standard residential AC replacement (existing infrastructure, no ductwork modifications): one full day (8-10 hours). For installations requiring electrical upgrade, line set replacement, or duct modifications: two days. For new construction or major retrofit (existing system removed and replaced with significantly different equipment, e.g., AC to heat pump conversion with electrical service upgrade): two to four days.
Do I need a permit for AC installation?: Yes. Every AHJ in our service area requires a mechanical permit for AC installation, ranging from $80 to $280 in residential permit fees. We pull every permit; we don’t perform unpermitted work. Unpermitted HVAC installations can void homeowner’s insurance, create disclosure problems on sale, and may violate manufacturer warranty requirements.
What if the AHJ inspector finds issues?: Our first-inspection pass rate across all AHJs in Salt Lake County is approximately 94.7%. When an inspector identifies an issue with our work, we correct it at no cost to the customer. When an inspector identifies pre-existing code violations not part of our scope (e.g., undersized service panel, missing GFCI in basement, improper gas line termination from a prior contractor), we provide a written description and quote for remediation as a separate change order.
Will the new equipment be louder or quieter than my old AC?: Significantly quieter. Modern AC condensers run at 56-72 dB depending on model and capacity, compared to 76-86 dB for 1990s and 2000s equipment. Variable-capacity inverter units (Carrier Infinity, Trane XV20i, Lennox SL28XCV) are the quietest, often at 56-62 dB — quieter than normal conversation. Indoor air handlers with ECM variable-speed blowers also run quieter than legacy PSC motors.
What if I want to upgrade later (e.g., add a heat pump or smart thermostat)?: We design installations with future upgrade paths in mind. Standard practice: install a smart-thermostat-compatible control board even if you’re starting with a basic thermostat; pull dual fuel wiring even if you’re only installing AC initially (in case you add a heat pump later); size the electrical disconnect for one tier higher than the equipment installed, when budget permits. Discuss future plans during the in-home assessment and we’ll engineer accordingly.

Schedule Your AC Installation Assessment

In-home assessments are free for installation projects and take 45-75 minutes on-site. Written quotes delivered within 48 business hours. No high-pressure same-day closing — you have the right to a three-day rescission period under FTC 16 CFR Part 429 and Utah Code § 70C-7-102 (covered in detail on the terms of service page).

Emergency Line (24/7): (385) 300-1867
Address: 756 E Winchester St #322, Salt Lake City, UT 84107
Email: info@saltlakecityheatingairconditioning.xyz
Utah DOPL HVAC Contractor License: #11567823-5501
EPA Section 608 Universal (Lead Tech): #608U-2009-447129

Schedule Your Assessment →

Office Hours

Emergency Service: 24 hours a day, 7 days a week
Office Staff: Monday – Friday, 8:00 AM – 5:00 PM
Closed: Weekends and State/Federal Holidays (emergency line always active)

AC Installation Salt Lake City | Manual J + R-454B