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A contractor quoting a central AC installation in Putnam County has to size the system for a climate that does throw serious weather at it, but not so often that storm load becomes the main variable in the work. 56 severe weather events were recorded in Putnam County, Ohio between 2015 and 2024. At that rate, most systems here have spent the bulk of their lives running against ordinary summer demand, and what wears them out is age and the quality of the original install. A contractor working through a replacement here will price the job around those factors, not around a weather record that, while real, leaves the design questions firmly in the hands of the installer.
Ductwork laid down for a furnace was sized and routed for that job. A central AC system moves air differently, and what the existing runs can actually carry is the question that shapes the scope of an installation here. Half the homes in Putnam County, Ohio were built in 1972 or earlier (2020-2024 ACS 5-year). A contractor working in this county opens duct runs before quoting, because whether the existing system handles the load determines whether the job is a unit swap or something larger. Electrical service matters too, but the ductwork is where the answer lives first.
What a Central AC Installation Covers, Part by Part
The outdoor condenser unit sits outside the house, usually on a concrete pad along a side or rear wall, and holds the compressor and condenser coil. The indoor air handler or furnace blower sits inside, most often in a basement, utility room, or closet, and moves conditioned air through the home. Together these two units form the system a contractor installs.
A refrigerant line set runs between the two units, connecting them through a small opening in the wall, and carries the refrigerant that links the indoor and outdoor sides. The thermostat mounts on an interior wall and gives the homeowner control over when the system runs. A contractor also installs the condensate drain line, which pulls moisture collected at the air handler out of the living space.
The drawing shows a typical layout, and a licensed contractor determines exactly how each piece applies to your house.
Get matched in Putnam CountyPutnam County, by the numbers
56 severe weather events were recorded in Putnam County, Ohio between 2015 and 2024.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.Half the homes in Putnam County, Ohio were built in 1972 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesPutnam County, Ohio holds 13,884 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 87.1% of the occupied homes in Putnam County, Ohio (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCode and Licensing Record for Central AC Installation in Putnam County, Ohio22 sourced rules and standards
What the Installation Actually Looks Like
Split-system central air conditioners rated below 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners rated at or above 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners manufactured between January 1, 2015 and December 31, 2022 had to meet 13 SEER, the metric that preceded SEER2.
Single-package central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Space-constrained central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 11.7 SEER2.
Federal efficiency standards for split-system central air conditioners and heat pumps are set on each certified combination of outdoor unit and indoor coil rather than on the outdoor unit alone.
Residential and light commercial air conditioning and heat pump systems assembled in the field, including mini-splits and unitary systems, may not be installed on or after January 1, 2025 using a refrigerant with a global warming potential above 700.
A field-assembled system whose specified components were all manufactured or imported before January 1, 2025 carries no installation compliance date under the refrigerant restrictions and may still be installed.
Licensing and Legal Requirements in Putnam County, Ohio
An Ohio home construction services contract must include a copy of the supplier's certificate of insurance showing general liability coverage of not less than two hundred fifty thousand dollars.
In Ohio a home construction service means the construction of a residential building, including the repair, improvement, remodel or renovation of an existing structure, and does not include construction on a structure containing four or more dwelling units except for work on an individual dwelling unit within it.
A home construction service supplier in Ohio is defined as a person who contracts with an owner to provide home construction services for compensation and who maintains a general liability insurance policy of not less than two hundred fifty thousand dollars.
The Ohio construction industry licensing board issues state licenses to individuals as heating, ventilating and air conditioning contractors, refrigeration contractors, electrical contractors, plumbing contractors and hydronics contractors.
An Ohio board of county commissioners may accept a valid and unexpired Chapter 4740 license held by a heating, ventilating and air conditioning contractor toward its own licensing requirements for work on one-, two-, or three-family dwelling houses.
An Ohio board of county commissioners may adopt rules licensing heating, ventilating and air conditioning contractors who are not required to hold a state license under Chapter 4740.
In Ohio municipal law a specialty contractor includes heating, ventilating and air conditioning contractors, refrigeration contractors, electrical contractors, plumbing contractors and hydronics contractors.
An Ohio board of county commissioners may not register a specialty contractor who is required to hold a license under Chapter 4740 but does not hold a valid one.
An Ohio municipal corporation may not register a specialty contractor who is required to hold a license under Chapter 4740 but does not hold a valid one.
In Ohio building law a residential building means a one-family, two-family or three-family dwelling house and any accessory structure incidental to it, and does not include an industrialized unit, a manufactured home or a mobile home.
Ohio's contractor licensing chapter reaches only work on a construction project, and a construction project is defined to exclude residential buildings, so an HVAC contractor working on a one-, two-, or three-family dwelling in Ohio falls outside the state licensing requirement.
Violating Ohio's contractor licensing prohibition is a minor misdemeanor on a first violation and a misdemeanor of the fourth degree on subsequent violations.
Under Ohio law no person may act as or claim to be a type of contractor that Chapter 4740 licenses unless that person holds a license issued under that chapter.
In Ohio a home construction service supplier may not perform a home construction service costing twenty-five thousand dollars or more without entering into a written home construction services contract with the owner, unless the supplier and owner enter into a cost-plus contract.
Severe Weather Events in Putnam County
Local weather puts real demands on cooling equipment over its lifetime. How hard a system has to work, and how reliably it needs to hold up, is shaped by what the climate here actually does.
56 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.