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A contractor sizing and installing a furnace in Putnam County is not working against a brutal weather record. 56 severe weather events were recorded in Putnam County, Ohio between 2015 and 2024. At roughly that rate, severe weather passes through, but it does not set the dominant terms of how a system ages. What drives installation decisions here is accurate load calculation for the structure, the quality of the ductwork, and the grade of equipment chosen for a home that will mostly run through ordinary Ohio winters. A contractor who attributes oversizing or underperformance to storm load is reaching past what the record here supports.
Ductwork laid down for an older furnace was sized and routed for that furnace's output, and a new unit does not inherit those assumptions for free. Half the homes in Putnam County, Ohio were built in 1972 or earlier (2020-2024 ACS 5-year). A contractor installing a furnace in stock like this opens the job by checking whether the existing distribution system will carry what the new equipment delivers, and in houses from that era the answer shapes everything from the equipment choice to the final cost. Electrical service gets the same look, since panel capacity in older homes does not always match what modern furnaces draw.
What Gets Installed With a New Furnace
The furnace itself sits in the basement, utility room, or crawlspace and is the heart of what gets purchased. A contractor mounts the heat exchanger and burner assembly inside that cabinet, along with the blower that pushes conditioned air through the house. The flue pipe runs from the furnace to an exterior wall or roof to carry combustion gases out.
The air handler components connect to your existing duct openings at the furnace cabinet, while the thermostat goes on a main living-area wall and tells the system when to fire. A contractor also installs the gas line connection at the unit and fits the filter housing where return air enters the cabinet before it reaches the heat exchanger.
The drawing shows a typical layout, and a licensed contractor determines what applies to your specific house and its existing setup.
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 EstimatesFurnace Installation Rules for Putnam County, Ohio18 codes, standards, and laws
What the installation actually looks like
Non-weatherized gas furnaces manufactured on or after November 19, 2015 must reach 80.0 percent AFUE.
Non-weatherized oil-fired furnaces manufactured on or after November 19, 2015 must reach 83.0 percent AFUE.
Mobile home gas furnaces manufactured on or after November 19, 2015 must reach 80.0 percent AFUE.
Non-weatherized gas furnaces manufactured on or after December 18, 2028 must reach 95.0 percent AFUE, up from the 80.0 percent minimum that applies to units manufactured before that date.
Licensing Rules for HVAC Work 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
Heating equipment works harder when the climate swings. How often Putnam County sees severe weather is part of what determines how much a furnace is asked to do over its lifetime, and that load shapes what makes sense to install here.
56 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.