A 1,600 square foot colonial built in the 1950s hides roughly thirty years of heating decisions in its basement, and almost none of them arrive with paperwork. You inherit the oil boiler, the two mini splits somebody retrofitted upstairs in 2019, and a faded service sticker naming a company whose phone number now rings nowhere. The house is fine. The heating system is a question mark, and a question mark is a miserable thing to own in November. Booking a licensed HVAC company Blackstone MA owners can keep on file, in the quiet weeks before the first cold snap rather than during it, costs less and works far better than an emergency call at ten at night in January. That is the argument of this guide, and everything below is about how to do that hiring well.
Homes Change Hands But Service Records Usually Do Not
Deeds transfer. Service history does not. What usually turns up in a closing packet is a stack of disclosures, a septic report if you are lucky, and nothing whatsoever about the appliance that keeps the pipes from freezing. Sellers rarely hang onto tune-up receipts, and the few who do rarely think to hand them across the table.
Cost is part of why that gap matters this year. An April 2026 analysis from the Senate Joint Economic Committee reported that New England families paid an average of $230 more for heating oil in March 2026 than they did in March 2025. A boiler running on a clogged nozzle and a soot-lined heat exchanger burns more of that expensive oil to push out the same warmth. Buying fuel at the going rate is the part you cannot control, and getting full value out of every gallon is the part you can.
Confirm The License Before Anyone Opens The Boiler
Ask for a license number before anyone touches the burner. Oil burner and gas fitting credentials are issued state by state, so the license that counts in Massachusetts is not identical to the one that counts two towns over the line in Rhode Island, and the state board is where you verify a number rather than the contractor's own website. If the house also carries ductless mini splits, ask separately about EPA certification for handling refrigerant, because that is a different qualification from anything on the oil side. A company that has worked the same handful of towns since the 1980s can usually name the inspector who signed off on your neighbor's install last spring. (Ask that one and watch how fast the answer comes.) Certificates of insurance should land in your inbox the same afternoon you request them.
Translate The Tags And Model Numbers On Your Equipment
Your equipment will tell you what it is, provided you know where to look. The plate on the boiler lists an input rating in BTUs per hour alongside an AFUE number, which is simply the share of the fuel you buy that becomes heat in your rooms instead of drifting up the chimney, and an old cast iron unit sitting at 78 percent is not broken so much as honest about its age. The burner carries a nozzle stamped with something like 0.85 80B, meaning it sprays that many gallons an hour in a particular pattern, and a wrong nozzle quietly costs you fuel every day it fires. The mini splits wear their own tags with a SEER2 rating, roughly the cooling world's version of that same fuel-to-comfort ratio. A good HVAC company Blackstone MA homeowners keep on file will read every one of those numbers back to you in plain English and leave them written down.
Copy the model and serial numbers into a note on your phone before winter sets in. Parts for a 1990s boiler still exist, but the counter clerk at the supply house needs that serial to find the right circulator or control. In practice, the owners who can rattle off those numbers over the phone get the repair finished in one visit instead of two.
What A Careful First Service Visit Actually Covers
A first visit on an inherited system is an inspection, not a quick cleaning. Expect a combustion test with a meter in the flue, covering stack temperature, draft and smoke number, then a fresh nozzle and oil filter, brushed flue passages, and a look at the tank and its lines for weeping seams or surface rust. On a 1,600 square foot colonial carrying two retrofit mini splits, that appointment runs noticeably longer than the routine autumn tune-up an established customer gets, because nothing on your system has a documented baseline yet. Say a first inspection and cleaning lands somewhere around $250 to $400 for a house like that once the mini split coils and filters are included, treating that as an illustrative scenario rather than a quote. The written record at the end is the real purchase.
Ask for that record before the technician packs up. It should name the equipment, list the readings taken, note the parts replaced, and flag what will need money in the next two or three years, such as a tank that is sound today but not at fifteen years old. Never fire an unfamiliar combustion appliance for the season before a licensed technician has inspected and tested it. A heating system does not care how excited you are about the house, and October is the month to find out what it wants.
Carbon monoxide is the part of all this that is not negotiable. Federal fire safety guidance calls for CO alarms in a central location outside each separate sleeping area and on every level of the home, basement included, which is exactly where an oil boiler lives. Test each one the week you move in and replace any unit past the expiration date stamped on its back. If an alarm sounds, or if anyone in the house develops a headache, nausea or sudden dizziness, get everybody outside into fresh air first and call 911 from outside. Do not walk back down to the boiler to investigate, do not open it up, and do not silence the alarm and wait to see what happens.
One Contractor On File Beats An Emergency Search
The worst possible moment to choose a heating contractor is the morning the house reads 54 degrees and every phone line in the county is jammed with neighbors in the same weather. A relationship built in September means your address already sits in the system, your equipment history is already typed up, and the dispatcher can see that the boiler is a thirty-year-old unit fed by a tank in the crawlspace. Service contracts formalize that arrangement, usually bundling the annual cleaning with priority scheduling and some discount on parts. Whether a contract pays for itself depends entirely on the equipment behind it, and on an aging oil boiler with no history at all, it generally does.
Buying an older house means adopting decisions other people made about it years ago. Heating is the one place where that adoption goes smoothly if it happens on a calm autumn afternoon, with a meter in the flue and a notebook open on the workbench. Verify the license first, then make sure somebody writes the baseline down where you can actually find it in February. The first cold snap arrives whether or not you are ready for it, and readiness here comes down to a phone call you make while the weather is still pleasant.
