Tell us about the job
Takes about a minute. No obligation.
A furnace contractor quoting a new installation in Washington County has to work out what the equipment will be running against before settling on a unit. 105 severe weather events were recorded in Washington County, Ohio between 2015 and 2024. At that rate, severe weather is a standing condition here, and sizing to catalog minimums leaves a system working harder than it was designed to for long stretches of its life. A contractor who accounts for that load from the start specs the equipment differently than one who treats the weather as a background variable.
Ductwork laid down for an older heating system carries assumptions about airflow, trunk sizing, and where heat needs to go that a modern furnace will not share. Half the homes in Washington County, Ohio were built in 1973 or earlier (2020-2024 ACS 5-year). A contractor quoting a furnace replacement in a house from that era has to assess whether the existing runs can move the volume the new unit produces, and whether the electrical service will support it. If the ductwork falls short, the installation price changes before the furnace is even ordered.
What Gets Installed With a New Furnace
The furnace itself sits in the basement, utility room, or closet and is the unit that produces heat. A heat exchanger inside it warms the air, and a blower motor pushes that air out into the home. The flue pipe runs from the furnace to an exterior wall or through the roof, carrying combustion gases out.
The thermostat mounts on an interior wall and is what the homeowner interacts with daily, telling the system when to run and at what temperature. A new furnace also comes with a filter housing at the air-intake side, and in many installs a new condensate drain line runs to a nearby floor drain or utility sink.
The drawing shows a typical layout, and a licensed contractor determines exactly what applies to your house and its existing setup.
Get matched in Washington CountyWashington County, Ohio, by the numbers
105 severe weather events were recorded in Washington 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 Washington County, Ohio were built in 1973 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesWashington County, Ohio holds 27,949 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 75.4% of the occupied homes in Washington County, Ohio (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFurnace Installation Rules & Codes for Washington County, Ohio18 sourced standards and regulations
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 and Legal Requirements in Washington 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 Washington County
Weather in Washington County puts real demands on heating equipment: hard winters and summer heat swings shorten equipment life and drive up the cost of an undersized or poorly installed system. Furnace installation here is a local decision, not a catalog one.
105 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.