Should I repair my old AC or replace it?

Rule of thumb: when repair cost approaches 30-40% of replacement cost on equipment older than 10 years, replacement usually wins economically. R-22 equipment (anything installed before 2010) is a special case because R-22 refrigerant costs $80-$150/lb versus $30-$50/lb for R-454B; ongoing repair becomes uneconomical fast. We provide both repair and replacement quotes when the decision is borderline, with 10-year operating cost projections.

What's the difference between SEER and SEER2?

SEER2 replaced SEER as the federal cooling efficiency standard on January 1, 2023. SEER2 uses revised testing conditions (higher external static pressure simulating real-world ductwork) so SEER2 ratings are typically about 5% lower than the equivalent SEER on the same equipment. A 14.3 SEER2 unit is roughly equivalent to the older 15 SEER. Federal minimum efficiency is now 14.3 SEER2 in northern climate zones including Utah.

What size AC do I need for my house?

It depends entirely on your specific building's load. Variables: square footage, insulation R-values, window U-factor and SHGC, infiltration rate (ACH50), shading and orientation, internal heat gains, ceiling height. A 1,400 sq ft 1950s Sugar House rambler with original windows might need 2 tons. A 1,400 sq ft 2022 Daybreak townhome with R-49 attic and triple-pane windows might need 1.25 tons. The only legitimate way to determine size is an ACCA Manual J load calculation.

Do I need to convert to R-454B if my current R-410A system fails?

For new equipment installation after January 1, 2025: yes, R-454B is what's manufactured. R-410A service refrigerant remains legal and available for repair of existing systems indefinitely. If your R-410A system has a major component failure, economic analysis usually favors full replacement with R-454B equipment. Minor repairs (capacitor, contactor, fan motor) on R-410A stay with R-410A.

What's the best AC brand for Salt Lake County?

Brand matters less than load calculation and installation quality. That said, for our climate we recommend Mitsubishi or Daikin for cold-climate heat pump applications, Carrier or Trane for traditional split-system AC, Lennox for the highest available SEER2 ratings, and Goodman for budget-conscious replacements where premium tier isn't justified.

Cooling Services Across Salt Lake County

July 19, 2024. 102°F at the Salt Lake City International Airport, 104°F on the asphalt of a driveway on Vine Street in Murray. Marcus Halverson rolled up to find the homeowner, Lin K., waiting with a FLIR One thermal imaging shot of her bedroom wall reading 91°F at 4 p.m. Her 2008 Lennox 13ACX three-ton condenser had failed the day before. The previous contractor had quoted a full system replacement at $9,400 without measuring the actual cooling load on the house, without testing the existing R-22 line set, and without inspecting the evaporator coil. Marcus ran an ACCA Manual J load calculation that night: the actual cooling load was 22,800 BTU/hr at the 96°F summer design temperature for Salt Lake County. Not 36,000 BTU/hr. Lin’s house had been over-cooled for sixteen years. A right-sized 2-ton Mitsubishi PUZ-A24NHA Hyper-Heat — which doubled as her heating system going forward — replaced both the failed AC and her 1996 80% AFUE furnace for $11,800 net of Rocky Mountain Power Wattsmart rebates and the federal IRA 25C tax credit. August 2025 electric bill: $124 lower than August 2024.

This is what good cooling work looks like in Salt Lake County: load calculation first, equipment selection second, installation third. The reverse order — pick equipment based on existing tonnage, install it, hope for the best — is how 60-70% of Salt Lake Valley homes ended up with oversized cooling systems that short-cycle, fail to dehumidify properly, and waste electricity for fifteen to twenty years at a stretch. Every cooling installation we touch starts with a measured Manual J. Every diagnostic visit starts with instruments — manifold gauges, capacitor microfarad readings, static pressure across the air handler. Permits get pulled with the relevant AHJ on every install: Salt Lake City Building Services for downtown work, Murray Building Department for properties south of 5300 South, plus West Valley City, Sandy, Draper, Holladay, Millcreek, South Jordan, Riverton, Cottonwood Heights, and Ogden City Building Services depending on jurisdiction.

Six Cooling Services

AC Repair

Diagnostic-first repair on residential and light-commercial cooling equipment. Most AC failures fall into one of seven categories: capacitor degradation (most common — a 35 µF dual-run dropping to 8 µF over six to eight summers), contactor pitting and welding, blower motor bearing failure or winding shorts, refrigerant leaks at flare connections or schrader cores or evaporator coil pinholes, control board failure (lightning damage during August monsoon backing), evaporator coil ice-over (caused by low refrigerant or restricted airflow), or condenser fan motor seizure. Most repairs land in the $185-$650 range, with the diagnostic fee ($89 weekdays, $149 after-hours) credited back if you authorize the repair the same visit. Detailed pricing, common failure patterns, and the diagnostic process are explained on the AC repair service page.

AC Installation

New AC and full system replacement. All equipment manufactured for sale in the United States after January 1, 2025 uses R-454B refrigerant under the EPA AIM Act — R-410A new equipment production has effectively ended. We size to ACCA Manual J load calculation at Salt Lake County’s 1% summer design temperature of 96°F dry bulb, with derate for our 4,226 ft elevation (cooling capacity reduces approximately 2-3% per 1,000 ft above sea level). Typical residential installs land between $6,800 and $11,400 depending on equipment tier, ductwork modifications, and complexity. Every install includes the AHRI matched-system reference number, manufacturer warranty registration filed within 72 hours of commissioning, AHJ permit, and post-install commissioning measurements: refrigerant pressures, subcool, superheat, and static pressure across the air handler. Read more on the AC installation page.

AC Tune-Up

Annual spring tune-up performed in late March through May, before peak summer demand. Each visit includes refrigerant pressure verification with subcool and superheat calculation, capacitor microfarad measurement against rated value (target within 6% tolerance), condenser coil chemical cleaning, evaporator coil visual inspection plus airflow check, condensate drain flush and safety float switch test, blower motor amperage compared to nameplate FLA, contactor visual and resistance inspection, and total external static pressure measurement across the air handler. Tune-ups are $129 as a one-time visit or included in the Comfort Care annual maintenance plan at $189/year, which also covers the fall furnace tune-up and waives the after-hours emergency fee for plan members.

Heat Pump Installation

Cold-climate variable-capacity heat pump installation. Salt Lake County’s ASHRAE 99% winter design temperature is 9°F — well within the operating envelope of modern cold-climate units. Mitsubishi Hyper-Heat H2i platform (MUZ-FS, PUZ-A, PUZ-HA outdoor units), Daikin Aurora, Bosch IDS Premium 2.0, and Carrier Greenspeed Infinity all maintain 100% of their rated heating capacity at 5°F outdoor temperature per NEEP Cold Climate Air Source Heat Pump (CCASHP) certification testing. We install both heat-pump-only systems and dual-fuel hybrid configurations where a 96% AFUE modulating gas furnace serves as auxiliary backup below a calculated balance point, typically 25-30°F. Pricing typically lands between $9,400 and $15,800, but Rocky Mountain Power Wattsmart rebates ($1,200 for cold-climate units), Dominion Energy ThermWise rebates ($600 for dual-fuel paired with high-efficiency furnace), and federal IRA 25C credit ($2,000 heat pump cap) bring net cost down to $5,800-$11,200 for most projects.

Heat Pump Repair

Diagnostic and repair on inverter-driven and conventional split-system heat pumps. Heat-pump-specific failure modes — in addition to standard cooling failures — include inverter board failure (more common in 2010-2015 Mitsubishi M-Series before the redesign), defrost cycle malfunction (typically a failed outdoor coil sensor or defrost board), reversing valve issues (electrical solenoid coil or pilot-bleed orifice), refrigerant charge errors (often the original installer didn’t compensate for line set length per manufacturer chart), and outdoor coil corrosion (Wasatch wind-blown dust and snowmelt salt accelerate this on Sandy bench and Cottonwood Heights elevations). Repair pricing falls in the $185-$650 range, similar to AC repair, but inverter system diagnosis requires manufacturer-specific tools and protocols — we hold Mitsubishi Diamond Contractor, Daikin Comfort Pro Premier, Bosch Authorized Pro, and Carrier Factory Authorized Dealer status.

Ductless Mini-Split

Single-zone and multi-zone ductless mini-split installation. Common applications across our service area: room additions where extending existing ductwork would require demolition (1920s Avenues bungalows, 1950s Sugar House ramblers), finished basements with limited return-air pathways, garage conversions and ADUs (accessory dwelling units — increasingly common under Salt Lake City’s 2024 zoning amendments), historic homes in Capitol Hill and Federal Heights without any ductwork, and supplemental cooling for problem rooms (north-facing master suites with poor airflow, west-facing afternoon-sun bedrooms above garages). Multi-zone systems use one outdoor unit serving 2-8 indoor heads through a single refrigerant circuit. We install Mitsubishi M-Series, Daikin FTXS/RXS, Bosch Climate 5000, and LG Art Cool product lines. Typical single-zone installs $4,800-$7,200; multi-zone systems $9,800-$22,400 depending on zone count and equipment tier.

The Salt Lake Valley Cooling Context

Three regional factors shape every cooling project we touch — none of them are addressed by cookie-cutter HVAC contractors flying generic playbooks from out-of-state corporate training centers:

Altitude (4,226 ft baseline at downtown SLC, 4,500-5,200 ft on the Sandy and Holladay benches):: Air density at Salt Lake’s elevation is approximately 0.0648 lb/ft³ versus 0.0765 lb/ft³ at sea level — a 15% reduction in air mass per cubic foot. This affects both heating (combustion air shortage requires manifold pressure derate) and cooling (reduced air mass flow through evaporator coils means lower heat transfer). Cooling capacity derate runs approximately 2-3% per 1,000 ft above sea level, so a 24,000 BTU/hr rated unit delivers approximately 22,000-22,500 BTU/hr at our elevation. ACCA Manual J load calculations factor altitude correctly. Rule-of-thumb sizing (“500 sq ft per ton”) doesn’t.
Climate Zone 5B (cold-dry):: The 2021 International Energy Conservation Code (IECC), as adopted in Utah, classifies Salt Lake County as Climate Zone 5B. The 5 indicates cold winters; the B indicates dry. Cooling design temperature is 96°F dry bulb at 64°F wet bulb, which corresponds to a relatively low latent cooling load compared to humid southeastern climates. We’re typically sizing for sensible heat removal rather than dehumidification, which means oversizing AC equipment in our climate is a more punishing error than elsewhere — there’s no humid air to absorb the excess capacity.
R-454B refrigerant transition (effective January 1, 2025):: All new residential cooling 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, which restricts production of high-Global Warming Potential refrigerants. R-454B has a GWP of 466 versus R-410A’s 2,088, a 78% reduction. It’s classified mildly flammable (ASHRAE Standard 34 designation A2L), which means slightly different installation procedures: smaller charge volumes, refrigerant detection sensors in some configurations, tighter brazing tolerances. We completed full R-454B transition training for all field technicians during Q4 2024 and maintain service inventory of both R-410A (for legacy system service and warranty work) and R-454B (for current installations).

Equipment Tiers We Install

Tier 1: Premium Variable-Capacity (15-22 SEER2 range)

Variable-speed inverter-driven systems with modulating capacity, typically delivering the best comfort and efficiency. Most expensive upfront, longest payback through utility savings.

Carrier Infinity 24VNA6 — 18 SEER2, variable-speed inverter, Greenspeed platform, Carrier Factory Authorized Dealer warranty
Trane XV20i — up to 22 SEER2, Climatuff variable-speed compressor modulating 25-100%, ComfortLink II touchscreen controls
Lennox SL28XCV — up to 28 SEER2 (highest residential SEER2 currently available), Quantum Coil corrosion protection, iComfort S30 integration
Mitsubishi MUZ-FH/MUZ-FS — ductless variable-capacity, Hyper-Heat capable down to -13°F outdoor
Daikin Aurora — cold-climate inverter heat pump with cooling efficiency up to 19 SEER2

Tier 2: Two-Stage (15-18 SEER2 range)

Two compressor stages (typically 60% and 100%) providing better part-load efficiency than single-stage units without the cost premium of variable-capacity.

Carrier Performance 24ACC6 — two-stage, 17 SEER2
Trane XR17 — two-stage Climatuff compressor, 17 SEER2, ComfortLink ready
Lennox EL18XPV — variable-speed compressor at 18 SEER2 price point
Bryant Preferred 226ANV — two-stage shared platform with Carrier Performance
Rheem Classic Plus RA17 — two-stage with EcoNet smart-home integration

Tier 3: Single-Stage Value (14.3-15 SEER2 range)

Federal minimum efficiency or slightly above. Reliable platforms at the lowest install cost — appropriate for rental properties, short-hold investment homes, or budget-driven replacements.

Carrier Comfort 24ABC6 — single-stage, 14.3 SEER2 (federal minimum)
Trane XR14 — single-stage, 14.3 SEER2
Goodman GSX140241 — reliable budget tier, common in rental and replacement-only scope
Amana ASX140241 — shared platform with Goodman, identical parts inventory
American Standard Silver 14 — Trane Silver-tier shared platform

How We Approach Every Cooling Project

Our installation workflow is the same on every job, from a $4,800 single-zone mini-split in a basement apartment to a $22,400 four-zone multi-split in a 1920s Avenues retrofit:

In-home assessment with Manual J load calculation. 45-75 minutes on-site, measuring window dimensions and U-factors, attic and wall insulation, ductwork condition, infiltration rate (ACH50 if a blower door test is in scope), interior heat gains. Most contractors skip this step or fake it with software defaults. We measure.
Manual S equipment selection. Matching equipment capacity to calculated load with proper sensible and latent split for our dry climate.
Manual D duct analysis. Total external static pressure modeling, duct sizing recommendations if existing system is undersized for the new equipment’s airflow requirements.
Written quote within 48 business hours. Itemized: equipment by line item with AHRI matched-system reference, labor by phase, permit fees by AHJ, refrigerant cost by pound, electrical and venting modifications by line item.
AHJ permit application. Filed with the relevant Authority Having Jurisdiction (we work with all 12+ municipal building departments in our service area regularly).
Installation by W-2 employee technicians. No 1099 subcontractors. Annual background checks. NATE certification current on all field staff. Equipment delivered, installed, refrigerant charged per manufacturer spec, commissioned with documented measurements.
Inspection coordination. AHJ inspector visit scheduled, work signed off, permit closed.
Manufacturer warranty registration. Filed within 72 hours of commissioning. Customer receives warranty documentation, AHRI certificate, and post-install measurement sheet as part of the project completion package.
Rebate paperwork. Rocky Mountain Power Wattsmart and Dominion Energy ThermWise applications filed on customer’s behalf within 5 business days.

Pricing Reference (Q2 2026 Salt Lake County)

Diagnostic visit, weekday business hours:: $89, credited toward authorized repair the same visit
Diagnostic visit, after-hours / weekend / holiday:: $149, credited toward authorized repair the same visit, waived for Comfort Care plan members
AC tune-up (one-time):: $129 single-visit, or included with Comfort Care plan ($189/year covers spring AC + fall furnace tune-up)
Typical residential AC repair:: $185-$650 (capacitor: $185-$320; contactor: $245-$385; refrigerant leak repair: $385-$840 plus refrigerant cost; blower motor: $485-$920; control board: $385-$640)
Single-stage AC installation (2-3 ton):: $6,800-$8,400 typical (Goodman, Amana, base-tier Carrier, base-tier Trane)
Two-stage AC installation (2-3 ton):: $8,400-$10,200 typical (Carrier Performance, Trane XR17, Lennox EL18XPV)
Variable-capacity AC installation (2-3 ton):: $10,200-$13,800 typical (Carrier Infinity, Trane XV20i, Lennox SL28XCV)
Cold-climate heat pump installation (2-3 ton):: $9,400-$15,800 gross; net cost after Wattsmart + ThermWise + IRA 25C typically $5,800-$11,200
Single-zone ductless mini-split:: $4,800-$7,200 installed (12,000-24,000 BTU/hr capacity range)
Multi-zone ductless (3-4 zones):: $12,800-$18,400 installed

Service Area

We perform cooling installation, repair, and maintenance throughout Salt Lake County and into Davis and Weber Counties. Specific city-level service detail and case studies are on the dedicated location pages: Salt Lake City, South Salt Lake, Murray, West Valley City, Sandy, and Ogden.

Frequently Asked Questions

Should I repair my old AC or replace it?: Rule of thumb: when repair cost approaches 30-40% of replacement cost on equipment older than 10 years, replacement usually wins economically. R-22 equipment (anything installed before 2010) is a special case — R-22 refrigerant costs $80-$150/lb versus $30-$50/lb for R-454B, so ongoing repair becomes uneconomical fast. We provide both repair and replacement quotes when the decision is borderline, with 10-year operating cost projections. Full repair vs. replacement framework on the AC repair page and detailed install economics on the AC installation page.
What’s the difference between SEER and SEER2?: SEER2 replaced SEER as the federal cooling efficiency rating standard on January 1, 2023. SEER2 uses revised testing conditions (higher external static pressure in the test setup, which better simulates real-world ductwork resistance) so SEER2 ratings are typically about 5% lower than the equivalent SEER rating on the same physical equipment. A 14.3 SEER2 unit is roughly equivalent to the older 15 SEER rating. Federal minimum efficiency for new equipment is now 14.3 SEER2 in northern climate zones including Utah.
What size AC do I need for my house?: It depends entirely on your specific building’s load. Variables include square footage, insulation R-values, window area and U-factor and SHGC, infiltration rate (ACH50), shading and orientation, internal heat gains from appliances and occupants, and ceiling height. A 1,400 sq ft 1950s Sugar House rambler with original single-pane windows might need 2 tons. A 1,400 sq ft 2022 Daybreak townhome with R-49 attic insulation and triple-pane windows might need 1.25 tons. The only legitimate way to determine your size is an ACCA Manual J load calculation, and rule-of-thumb sizing is wrong in roughly 70% of Salt Lake Valley homes. Read more about the sizing process on the new construction HVAC page or check out one of our installations on the case studies hub.
Do I need to convert to R-454B if my current R-410A system fails?: For new equipment installation after January 1, 2025: yes, R-454B is what’s currently manufactured. R-410A service refrigerant remains legal and available for repair of existing systems indefinitely. If your R-410A system has a major component failure (compressor, evaporator coil, condenser coil), economic analysis usually favors full replacement with R-454B equipment over major component replacement on R-410A. Minor repairs (capacitor, contactor, fan motor) on R-410A stay with R-410A and continue normally.
What’s the best AC brand for Salt Lake County?: Brand matters less than load calculation and installation quality. That said, for our climate we recommend Mitsubishi or Daikin for cold-climate heat pump applications (Sandy bench elevations and beyond), Carrier or Trane for traditional split-system AC, Lennox for the highest available SEER2 ratings, and Goodman for budget-conscious replacements where premium tier isn’t justified. Full brand breakdown with dealer relationships and training certifications on the brands we service page.

Contact Salt Lake City Heating & Air Conditioning

If you’d like a no-obligation cooling assessment with Manual J load calculation and written quote, schedule an in-home visit. Assessments take 45-75 minutes and produce a written proposal within 48 business hours. For repair service, emergency dispatch is available 24/7.

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 Cooling 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)

Cooling Services | SLC Heating & Air Conditioning