Tell us about the job
Takes about a minute. No obligation.
A boiler going into a Union County home is not being sized for a mild climate. 102 severe weather events were recorded in Union County, Illinois between 2015 and 2024. At that rate, severe weather is a standing part of what heating equipment here runs against, and a contractor sizing a new boiler has to account for that load from the start. A unit spec'd from a catalog without factoring in local conditions will cycle harder, stress its heat exchanger earlier, and cost more to keep running than one sized with this area's record in mind.
Ductwork laid in for one generation of heating equipment was never cut to carry what runs now, and in Union County that gap is where a boiler installation lives or dies. Half the homes in Union County, Illinois were built in 1975 or earlier (2020-2024 ACS 5-year). A contractor opening up walls and chases here is checking whether the existing distribution lines can handle the new system's output and routing, because if they cannot, that work becomes the job before the job. The boiler itself goes in on a known schedule; what the house already contains sets the actual scope.
What a Boiler Installation Puts in Your Home
The boiler itself sits in a mechanical room, basement, or utility closet and is the heart of the system. It heats water that travels out through the house to deliver warmth. A contractor also installs the expansion tank nearby, which absorbs pressure changes as the water heats and cools.
Radiators or radiant floor tubing go in the living spaces and are the pieces a homeowner sees and feels. The circulator pump, mounted close to the boiler, pushes heated water through the pipes to those terminal points. A pressure relief valve and controls also go in during installation, governing how the system runs and protecting it from excess pressure.
The drawing shows a typical layout, and a licensed contractor determines exactly which components and configurations apply to your specific home.
Get matched in Union CountyUnion County, Illinois, by the numbers
102 severe weather events were recorded in Union County, Illinois 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 Union County, Illinois were built in 1975 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesUnion County, Illinois holds 7,851 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 77.4% of the occupied homes in Union County, Illinois (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesBoiler Installation Rules on the Books for Union County, Illinois1 codes & standards
Licensing and Legal Requirements in Union County, Illinois
Illinois leaves HVAC licensing to the municipality: state law lets the corporate authorities of each city or village examine, license and regulate heating, air conditioning and refrigeration contractors, and caps the licence fee they may charge at $50 — so who licenses you depends on the town you work in.
Severe Weather Events in Union County
Weather in southern Illinois puts real pressure on heating equipment over time. A boiler that cycles hard through rough winters and volatile shoulder seasons wears faster, and sizing and installation decisions that ignore local conditions tend to show their costs early.
102 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.