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A contractor quoting a furnace installation in Franklin County has to account for what the system will run against for years, not just on a mild day. 268 severe weather events were recorded in Franklin County, Ohio between 2015 and 2024. At that rate, severe weather is part of the normal operating environment, and it bears directly on how a furnace is sized and how tightly it is installed. A unit that fits the catalog spec but not the actual load of this area will work harder than it was built to, and the joints, seals, and duct connections that a careless install leaves loose will show it sooner.
Ductwork laid in decades when furnaces ran hotter and drew harder is not automatically ready for a modern system's airflow requirements. Half the homes in Franklin County, Ohio were built in 1979 or earlier (2020-2024 ACS 5-year). That distribution of building ages means a contractor sizing a new furnace here spends real time evaluating what the existing duct network will actually carry before any equipment gets ordered. A run that worked for the old unit may restrict a new one, create pressure imbalances, or require rerouting. The electrical side gets checked too, since panel capacity in houses of this vintage varies considerably. The furnace itself is often the straightforward part of the job.
What Gets Installed With a New Furnace
The furnace itself sits in the basement, utility room, or closet, depending on the house. That cabinet holds the burner assembly, the heat exchanger, and the blower motor, all of which get set in place and connected during installation. The thermostat mounts on a wall in the living area and gives the homeowner control over the whole system.
The flue pipe runs from the furnace up and out of the house, carrying combustion gases away. Alongside it, the contractor installs the condensate drain line if the unit is a high-efficiency model, and connects the gas line to the burner. The filter housing, which keeps debris out of the blower, sits where the return air enters the unit.
The drawing shows a general layout of these components, and a licensed contractor determines exactly how each one applies to your house.
Get matched in Franklin CountyFranklin County, Ohio, by the numbers
268 severe weather events were recorded in Franklin 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 Franklin County, Ohio were built in 1979 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFranklin County, Ohio holds 595,469 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 52.8% of the occupied homes in Franklin County, Ohio (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFurnace Installation Rules for Franklin County, Ohio18 sourced standards and codes
What the installation looks like from your side
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 Contractors in Franklin 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 Franklin County
Franklin County weather puts real cumulative stress on heating equipment, and that stress shapes what a furnace needs to handle over its working life. Installation decisions made without accounting for local conditions are decisions made blind.
268 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.