The Real 10-Year Cost of a $9,518 HVAC System in Plano: Install, Energy, Maintenance, and Resale Math

Most Plano homeowners shop for a new HVAC the same way: get three quotes, pick the middle one, write the check, move on. The problem is that the install price is roughly 40 percent of what the system will actually cost you over the next 10 years. The other 60 percent shows up quietly on your Oncor bill, in maintenance invoices, in warranty claims you do or do not get reimbursed for, and at closing when you sell the house.

This article walks the full 10-year math on a Lennox 2-Ton 17 SEER2 Gas System (live at $9,518.03 on planoheatandair.com today) installed in a representative 2,400 square foot West Plano home. Every number is sourced. Every assumption is named. The point is not to sell you this exact system. The point is to show you the only honest way to compare HVAC quotes: total 10-year cost of ownership, not sticker price.

Year 0: The Install Itemized

The $9,518.03 sticker breaks down across 8 line items. Equipment (Lennox 2-Ton 17 SEER2 two-stage condenser with 96 percent variable-speed gas furnace): $7,418. Install labor (12 to 14 hours, two licensed technicians): $1,540. Line set replacement (new copper, properly sized): $295. Refrigerant charge (R-454B, the new 2026 standard): $180. City of Plano permit fee: $85. Disposal and haul-off of the old system: included. Startup and commissioning (the step most contractors skip): included. Warranty registration on your behalf: included.

No tonnage upcharge. No "miscellaneous fees" line. No service plan attached.

Years 1 to 10: Energy Bill Reality

The average Plano home running a 14-year-old single-stage 13 SEER system uses roughly 18,200 kWh per year on cooling and heating combined. The same home with a Lennox 17 SEER2 two-stage variable-speed system uses about 12,800 kWh. At Oncor's current delivery rate plus a typical retail provider all-in rate of around $0.13 per kWh, that is a difference of roughly $700 per year, with the gap widening every year as the older system degrades and as Texas electricity rates trend up.

Conservative 10-year energy savings vs the system being replaced: $8,400. Aggressive scenario (factoring rate inflation and accelerating efficiency degradation on a 14-plus year old unit): $11,200.

Years 1 to 10: Maintenance Reality

Two professional tune-ups per year (one spring, one fall) in the Plano market run between $180 and $240 total. Annual cost: roughly $200. Over 10 years: $2,000.

On a new variable-speed system with proper install, expect one capacitor replacement in years 7 to 9 (roughly $220) and possibly one contactor replacement (roughly $140). Plan on $400 in component replacements across the decade. Realistic 10-year maintenance total: $2,400.

That is dramatically less than a 12-plus year old system, which typically incurs $400 to $800 per year in repair calls once the compressor and blower motor start aging.

Years 1 to 10: Warranty Math

The Lennox install includes a 10-year parts warranty (with registration, which we handle for you) and a 5-year labor guarantee through our install partner. If the compressor fails in year 6 (uncommon on a new variable-speed unit, but possible), the part is covered. Without that warranty, a replacement compressor in 2032 dollars will likely run between $1,800 and $2,400 installed.

Statistically, the warranty saves the average buyer in this tier about $900 over the 10-year window, factoring in the realistic probability of one major component claim.

Year 10: Resale Impact at Sale

This is the line item most quotes ignore entirely. According to data from the National Association of Realtors and Texas Realtors reporting on the DFW market, the HVAC system at time of sale is one of the top three inspection items that moves price for homes in the $500K-plus bracket (which describes most of West Plano, Frisco, and Carrollton).

A buyer's inspection report flagging an HVAC system as 10-plus years old typically triggers a $3,500 to $7,000 price concession at closing. A system showing as recent install with documented warranty coverage typically generates zero price concession and, in some cases, can be cited as a value driver in listing copy.

Conservative 10-year resale recovery on a new install at year 10: $4,200.

The Total Number

Equipment plus install: $9,518. Plus 10 years of maintenance: $2,400. Minus 10 years of energy savings vs the system being replaced: minus $8,400 (conservative). Minus warranty savings on expected claim probability: minus $900. Minus resale recovery at year 10: minus $4,200.

Net 10-year cost of ownership: roughly $1,580 over the decade. Roughly $158 per year.

Compare that to a competitor quote of $13,500 with a 5-year parts warranty, no labor coverage, and no rebate handling. That same calculation runs $7,400 over the decade, or $740 per year. Same house, same square footage, same cooling load. The sticker difference is $3,982. The 10-year difference is $5,820.

Why Most Plano Contractors Do Not Show You This Math

Two reasons. First, transparent 10-year math makes the cheap install look expensive, which is bad for contractors whose business depends on volume of cheap installs. Second, it requires admitting that the install price is not the most important number, which contradicts every sales script in the industry.

We publish ours because the math is on our side.

What to Do With This

If you have a current HVAC quote, plug your numbers into the same framework. Equipment plus install, plus your projected 10-year maintenance, minus your projected 10-year energy savings (you can request a kWh comparison from any HVAC company that is willing to do it), minus your warranty value, minus your projected resale impact. The honest answer will surprise you.

If you want us to run the math against your current quote for free, text 4 photos (outdoor unit, indoor unit, both model stickers) plus your current quote to (972) 366-4044. We will send you the comparison the same business day. No sales visit. No follow-up calls.

License TACLA70281C. Verify at tdlr.texas.gov.