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A contractor sizing a furnace in Ross County has to account for what this area actually asks of heating equipment, and that starts with the weather record rather than a catalog spec sheet. 107 severe weather events were recorded in Ross County, Ohio between 2015 and 2024. At that rate, severe weather is a standing condition across the county, not an occasional interruption, and a furnace sized to a national average load profile will spend winters running short of what the house needs. The equipment choice and the installation details both follow from that judgment.
Ductwork in a house this old was designed around the equipment that came with it, and modern furnaces draw and distribute air differently enough that the existing layout often needs assessment before a new unit can be matched to it. Half the homes in Ross County, Ohio were built in 1974 or earlier (2020-2024 ACS 5-year). A contractor quoting a furnace installation here pulls the job scope from what the ducts can actually do, not from the unit alone. Undersized returns or sections that were sealed and forgotten drive the real decisions about what gets replaced and what stays.
What Gets Installed With a New Furnace
The furnace itself sits in the basement, utility room, or closet and is the piece doing the heating work. A gas burner fires inside it, a heat exchanger warms the air passing over it, and a blower pushes that air out into the house. That cabinet and everything inside it is what a contractor sets into place first.
The flue pipe runs from the furnace up and out of the house, carrying combustion gases away. Alongside it, the contractor installs a new thermostat on an interior wall, which is the control point the homeowner actually touches. Some installations also include a new filter housing or an air handler depending on how the rest of the system is set up.
The drawing shows the general layout of these components, and a licensed contractor determines exactly what applies to this house.
Get matched in Ross CountyRoss County, Ohio, by the numbers
107 severe weather events were recorded in Ross 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 Ross County, Ohio were built in 1974 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRoss County, Ohio holds 32,092 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 69.6% of the occupied homes in Ross County, Ohio (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFurnace Installation Rules for Ross County, Ohio18 sourced standards and codes
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 That Apply in Ross 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 Ross County
Heating equipment in Ross County works against whatever the local climate puts out, and the pressure those conditions place on a furnace over its lifetime is a local fact, not a general one. A contractor sizing and installing equipment here accounts for that load.
107 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.