How long a new HVAC system lasts in Lake Mary, Florida
Plan on the mid-teens in years rather than a specific number, and expect the low end of any national figure here. Orlando records roughly 3,452 cooling degree days a year on NOAA’s 1991–2020 normals, so a Lake Mary system banks runtime hours far faster than the same equipment further north.
Your warranty starts at installation, and registration cannot shorten it
This is worth knowing before a salesperson uses it: under s. 559.957, Fla. Stat., an HVAC system warranty runs from the date of installation by a Florida-licensed contractor, and a manufacturer may not condition it on the owner returning a registration card. Ask for the parts, compressor and labour terms as three separate numbers in years, and ask who honours the labour term — the contractor or a third-party administrator.
The thing that shortens a Lake Mary system fastest is not the equipment. It is the duct system it is connected to. A 1988 attic duct run leaking into a hot attic makes a new SEER2 rating a number on a sticker: the compressor runs longer for the same result, and runtime is what wears out. In a city whose 25th-percentile build year is 1988, that is not a hypothetical.
The question, in the wording people ask it
How Long Should My New HVAC System Last?
Plan on the mid-teens in years rather than a specific number, and expect the low end of any national figure here: Orlando records roughly 3,452 cooling degree days a year on NOAA's 1991–2020 normals, so a Central Florida system accumulates runtime hours far faster than the same equipment in a four-season climate. Maintenance, correct sizing and duct condition move the number more than brand does.
These questions are the verbatim wording used on live pages that rank for Lake Mary and Florida air-conditioning queries. They are evidence of how the question gets typed, not a capture of Google’s People Also Ask box.
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Researched 6 September 2026. Fees, rebate amounts and code minimums change — check the issuing authority before you rely on a figure.