The Case for Switching From Oil to Gas
Home heating oil has kept houses warm for generations, but the economics and logistics of oil heat have shifted. Oil prices swing with global markets, deliveries depend on scheduling and road access, and an aging oil furnace or boiler often runs at efficiency levels far below modern equipment. For many homeowners, the ongoing cost of keeping an oil tank filled, maintained, and inspected adds up year after year.
Converting to natural gas removes much of that unpredictability. Gas arrives through a metered line, so there is no tank to monitor and no delivery truck to wait for. Modern gas appliances also burn cleaner and can reach efficiency ratings that were simply not possible with older oil units. At Larry's Plumbing, Heating and Cooling, we handle oil to gas conversions as a complete project, from evaluating your existing setup to firing up the new system and confirming it runs correctly.
What Happens During a Conversion
An oil to gas conversion is more than swapping one heater for another. It involves the fuel source, the appliance itself, the venting, and in many cases the removal of old equipment. We treat each conversion as its own project because every home presents different conditions. A house with an existing gas line for the stove or water heater has a different scope than one that has never had gas service at all.
Our typical conversion follows a clear sequence so you always know what to expect:
- Site evaluation: We inspect your current oil system, check the location of the gas main, and measure the heating load your home actually requires.
- Gas line coordination: We work with the utility to bring a service line to the meter, then run properly sized piping to the appliance.
- Equipment selection: We help you choose a gas furnace or boiler matched to your home, not an oversized unit that short-cycles and wastes fuel.
- Old system removal: We disconnect and remove the oil-burning unit and address the old tank as part of the plan.
- Installation and venting: We set the new appliance, connect the gas supply, and install code-compliant venting for the type of equipment chosen.
- Startup and testing: We commission the system, verify combustion, check for leaks, and confirm the unit meets its rated performance.
Because we are a full service company, the plumbing, gas fitting, and heating work all stay under one roof. You do not have to coordinate separate contractors for the gas line, the appliance, and the venting. Larry's Plumbing, Heating and Cooling manages the entire process.
Technical Details That Matter
The efficiency gain is usually the headline reason people convert, but the details deserve attention. Older oil boilers and furnaces often operate in the range of 60 to 75 percent efficiency once age and soot buildup are factored in. Modern condensing gas units can reach 90 percent and higher, meaning far more of the fuel you pay for actually turns into heat for your home. That difference shows up on every bill through the heating season.
Venting is another area where the switch changes things. High-efficiency condensing gas appliances extract so much heat from the exhaust that the flue gases cool enough to be vented through PVC pipe rather than a traditional masonry chimney. This affects where the equipment can sit and how the venting is routed. We size the gas piping to deliver adequate volume at the correct pressure, because an undersized line can starve the appliance and cause nuisance shutdowns. Proper combustion air, condensate drainage, and safe termination of the vent are all part of a code-compliant installation, and we address each one during the conversion.
Where Conversions Make the Most Sense
We see oil to gas conversions in a wide range of situations. Some homeowners are replacing a failing oil boiler and decide the timing is right to change fuels entirely. Others are tired of scheduling deliveries and want the convenience of a metered supply. Still others are renovating and want to modernize the mechanical systems while walls and floors are already open. In multi-family buildings and small commercial properties, the switch often pairs with upgrades to domestic hot water so a single gas supply serves several appliances.
No matter the setting, the goal stays the same: a reliable, efficient heating system that fits the building and the budget. We service all makes and models, so whether you are keeping a compatible distribution system or starting fresh, we can work with what you have. We also offer free estimates, so you can understand the scope and investment before committing to anything.
Why Work With Larry’s Plumbing, Heating & Cooling
We are a family owned full service plumbing, heating and cooling business that has been in operation since 1982. Decades of conversions across Vermillion and Yankton, SD have taught us how to handle the surprises that come with older homes, from tight mechanical rooms to unusual venting paths. Our crews treat each home as if it were their own, protecting floors, cleaning up after the work, and explaining how the new system operates before we leave.
Heating problems rarely wait for business hours, which is why we offer 24/7 emergency service. If your oil system fails in the middle of winter, we can respond quickly and discuss whether a repair or a conversion makes the most sense for your situation. To keep a project manageable, we also offer financing so the upgrade fits your budget rather than forcing you to wait. When you are ready to leave oil behind, Larry's Plumbing, Heating and Cooling is ready to guide you through every step.