Frisco York-to-Daikin HVAC Replacement: 1.5-Ton R-32 Case Study

Project completed October 2, 2026 | Frisco, Texas 75035

After the homeowner reported that the system was not cooling, Greentech Engineering Heating & Air Conditioning — DFW HVAC replaced one weathered York straight-cool system in a Frisco, TX 75035 single-family home. The new system includes a nominal 1.5-ton Daikin R-32 air conditioner, matched horizontal evaporator coil and 60,000-BTU-input gas furnace. This page documents one completed project; it is not a sizing recommendation for other homes.

AHRI certificate 214856763 rates the exact installed combination at 17,600 BTUH, 15.0 SEER2 and 12.0 EER2. Greentech completed the permit and inspection process, and the installation passed final inspection.

Project facts

• Location: Frisco, Texas 75035
• Property: Single-family home
• Customer-reported problem: No cooling; specific failed component not provided
• Existing equipment: One York straight-cool A/C, coil and gas-furnace system
• Installation completed: October 2, 2026
• New cooling system: Nominal 1.5-ton Daikin single-stage R-32 A/C
• Outdoor model: DC4SEA1810AA
• Horizontal coil: CHPTA2426B3AA
• Gas furnace: DR80SN0603AXAA
• Furnace rating: 60,000 BTUH input, 48,000 BTUH output and 80% AFUE
• AHRI reference: 214856763
• Certified performance: 17,600 BTUH, 15.0 SEER2 and 12.0 EER2
• Permit and inspection: Permit process completed; final inspection passed
• Contractor labor warranty: Complimentary three-year/1,095-day labor warranty, subject to written terms

How is this project different from Greentech’s other Frisco 75035 case study?

This October 2 project involved a weathered York system, a customer-reported no-cooling condition and a nominal 1.5-ton Daikin R-32 replacement rated at 17,600 BTUH and 15.0 SEER2. It is separate from Greentech’s published 3-ton Frisco upstairs replacement, which involved an approximately 16-year-old Goodman system, a different homeowner decision, different model numbers and a 34,400-BTUH, 15.2-SEER2 AHRI match.

The two pages should not be combined because they answer different homeowner questions: this case focuses on a smaller 1.5-ton York-to-Daikin replacement and exact-match rating differences, while the earlier case focuses on an upstairs 3-ton replacement after a history of frequent repairs.

What the homeowner was deciding

The homeowner reported no cooling and selected replacement of one complete A/C, evaporator-coil and gas-furnace system. The project photographs document a weathered York outdoor unit with visible surface corrosion, an older horizontal attic system and the installed Daikin components.

The supplied record does not identify the specific failed component or show what repair-versus-replacement alternatives were presented. It also does not include Manual J sizing, diagnostic measurements or before-and-after comfort data. This case therefore documents the selected replacement and installation—not an inferred failure diagnosis or a universal recommendation for other homes.

• What problem did the homeowner report? No cooling.
• What facts were confirmed? One weathered York system, visible outdoor corrosion, exact new equipment models, R-32 refrigerant, horizontal attic configuration, AHRI match and passed final inspection.
• What did the homeowner select? Complete replacement of one A/C, coil and gas-furnace system.
• What related work was included? Condensate protection, drain pan, condenser pad, gas sediment trap, line-set preparation, equipment connections, sealing and startup/testing according to the written job scope.
• What does the case not prove? Failure cause, energy savings, right-sizing, airflow improvement, comfort improvement or future reliability.

What the photographs showed before replacement

The existing York outdoor condenser showed substantial visible surface corrosion.

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The attic photographs showed the older horizontal indoor assembly that was replaced as part of the same system.

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Corrosion is relevant condition evidence, but it is not a diagnosis. Without service measurements identifying the failed component, the article cannot conclude that corrosion caused the no-cooling condition. The exact age and efficiency rating of the York system were also not supplied.

Project photos used with permission. Identifying information has been removed.

Why the exact AHRI match matters

HVAC efficiency figures can refer to different levels of information:

1. a product family or minimum regulatory class;
2. the highest performance available within a product family; or
3. the certified performance of one exact outdoor unit, indoor coil and furnace/blower combination.

For this installation, the controlling system rating is the exact AHRI match—not a general product-family headline. AHRI certificate 214856763 covers the installed DC4SEA1810AA condenser, CHPTA2426B3AA coil and DR80SN0603AXAA furnace/blower combination. It rates that combination at 17,600 BTUH, 15.0 SEER2 and 12.0 EER2.

Greentech confirmed the AHRI-certified match during quotation and equipment selection before installation. The certificate copy was downloaded on October 8, six days after the October 2 installation; that later date records when the document copy was retrieved, not when the equipment match was first checked.

What Greentech installed

The outdoor unit is a nominal 1.5-ton Daikin single-stage straight-cool air conditioner using R-32 refrigerant. The indoor equipment includes a matched horizontal cased evaporator coil with a factory-installed TXV and an 80% AFUE single-stage gas furnace with a multi-speed ECM blower.

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Cooling and heating ratings describe different functions. The air conditioner’s nominal 1.5-ton classification refers to cooling capacity. The furnace is properly described by its 60,000-BTU input, 48,000-BTU output and 80% AFUE—not as a “three-ton furnace” or a “full gas” cooling system.

Installation details

The written project scope included removal and disposal of the old system, refrigerant recovery, a concrete condenser pad, gas sediment trap, drain pan, Safe-T drain switch and drain-line insulation. It also addressed condensate-drain preparation, horizontal indoor-equipment connections, plenum sealing, gas and vent/flue modifications and refrigerant line-set preparation.

The scope specified RX-11 and dry-nitrogen line-set cleaning, brazing with a 15% silver alloy, a dry-nitrogen pressure test, evacuation below 500 microns and system startup/testing. These are important commissioning procedures; however, the detailed pressure, duration and vacuum figures should be presented as achieved results only when confirmed by the final technician closeout record.

What the result establishes—and what it does not

The evidence establishes the installed models, refrigerant type, AHRI-certified match, horizontal attic configuration, installation date and passed final inspection. It also visually documents the before-and-after equipment.

This evidence does not establish that corrosion caused the original complaint, that the 1.5-ton system was selected from a Manual J load calculation, or that energy use, airflow, humidity or comfort improved by a specific amount. Actual operating results vary with the home, duct system, controls, installation and operating conditions.

Warranty summary

Greentech provided a complimentary three-year labor warranty for eligible labor on the installed Daikin system, subject to the project’s written warranty terms, exclusions and ownership restrictions.

Manufacturer limited warranties are separate and subject to timely registration, eligibility, maintenance requirements, exclusions and the applicable written terms. Homeowners should retain the final estimate, invoice, equipment registration, AHRI record, labor-warranty terms and permit closeout together.

Frequently asked questions

What equipment was installed in this Frisco home?

Greentech installed a nominal 1.5-ton Daikin R-32 straight-cool air conditioner, matched horizontal evaporator coil and a 60,000-BTU-input, 80% AFUE gas furnace. AHRI certificate 214856763 rates the exact combination at 17,600 BTUH, 15.0 SEER2 and 12.0 EER2.

What does 17,600 BTUH mean on a nominal 1.5-ton system?

“Nominal 1.5-ton” identifies the equipment class; it does not promise an exact 18,000 BTUH result in every matched configuration. AHRI certificate 214856763 rates this exact condenser, coil and furnace/blower combination at 17,600 BTUH under the certificate’s test conditions, so 17,600 BTUH is the project-specific certified value.

Is a 1.5-ton air conditioner appropriate for every smaller Frisco home?

No. Equipment size depends on the served area, building envelope, windows, orientation, duct system, indoor design conditions and other project-specific factors. The supplied record for this case did not include a Manual J load calculation, so this article documents the installed system without presenting 1.5 tons as a universal recommendation.

Why is the furnace listed as 60,000 BTU when the air conditioner is 1.5 tons?

Cooling capacity and furnace heating input are different ratings. The air conditioner is described by its nominal cooling class, while the furnace is described by heating input, output and efficiency. The furnace should not be converted into a tonnage rating.

Is 14.3 SEER2, 15.0 SEER2 or 15.2 SEER2 the correct rating?

Those numbers may describe different product-family or matched-system ratings. For this installed system, the controlling public figure is the 15.0 SEER2 rating on the AHRI certificate covering the exact condenser, coil and furnace/blower combination.

Did the visible corrosion cause the old York system to fail?

The photographs show substantial surface corrosion, but the supplied record does not identify corrosion as the failure cause. A technical diagnosis requires service findings, not appearance alone.

Was every HVAC system at the home replaced?

The project evidence supports replacement of one system. Another outdoor unit is visible in the photographs, so this article does not claim that every system at the property was replaced.

What labor warranty applied?

The project record describes a complimentary three-year/1,095-day Greentech labor warranty, subject to the written eligibility requirements, exclusions, claim procedures and ownership restrictions.

Request a transparent HVAC replacement estimate

Greentech Engineering Heating & Air Conditioning — DFW HVAC provides written, itemized estimates that identify the proposed equipment, related work and authorized price before installation. Frisco homeowners can review Greentech’s Frisco HVAC services, A/C replacement service in Frisco and heating replacement service in Frisco.

Request a transparent HVAC replacement estimate or schedule an HVAC evaluation in Frisco, or call (469) 551-6806.

About the author

Siwei (Lucas) Chen
Chief Technology Officer | Greentech Engineering Heating & Air Conditioning — DFW HVAC

Siwei (Lucas) Chen applies an engineering-based, data-first approach to residential HVAC system design, diagnostics, airflow measurement, equipment selection and duct-system optimization across Dallas–Fort Worth. He holds a B.S. in Mechanical Engineering from Virginia Tech.

Lucas completed ACCA’s Residential Design for Quality Installation Course, which covers residential design procedures associated with ACCA Manuals J, S, T and D. He is also an NCI Certified Residential Air Balancer and NCI Certified Duct System Optimization Specialist.

Technical facts last verified October 8, 2026.