Boiler Installation and Replacement in Andover, MA
Andover has a lot of homes built before oil heat gave way to gas, which means a lot of original or second-generation steam boilers still doing the job. Some of them are on borrowed time, and some just need a competent look before anyone talks about replacement. Chris handles both conversations the same way: tell you what he actually sees, not what sells the biggest job.
Boiler Installation and Replacement in Andover
We are a Salem-based company and Andover sits at the far western edge of where we work, so we are upfront about scheduling rather than pretending we are five minutes away. A boiler swap gets booked, not walked in on. Once we’re on site, the work itself doesn’t change because of the drive. Same drain-down, same venting checks, same gas sizing calculations whether the house is in Salem or off River Road in Andover.
What does change town to town is the housing stock, and Andover’s is a mix that keeps us paying attention. You’ve got historic center homes with knob-and-tube ghosts in the walls and a boiler that’s outlived two owners, next to post-war colonials with their original cast iron still chugging along, next to newer construction with high-efficiency combi units that were installed to spec and just need normal service life attention.
What Andover homes typically have
Steam heat is common in the older sections of Andover, especially homes built before the 1950s near the town center. Cast iron radiators, a single steam boiler in the basement, and a system that’s forgiving if maintained but expensive to replace badly. Post-war construction around town tends to run hot water baseboard instead, usually paired with a cast iron or early steel boiler that’s now 25 to 40 years old.
Gas availability varies block by block. Much of Andover has natural gas on the street, which opens up higher-efficiency boiler and combi options. Some pockets, particularly further out toward the Tewksbury and North Andover lines, are still oil-only or propane. That single fact changes the entire equation: unit selection, venting method, even whether a tankless water heater makes sense alongside the boiler work. We check gas availability before we quote anything, not after.
Most of Andover is on town water, but there are private wells scattered through the more rural stretches. On well water, we look at the boiler’s heat exchanger and any indirect hot water tank for mineral buildup, since hard well water shortens boiler life faster than town water does.
What the work involves
A full boiler replacement starts with draining the existing system and disconnecting the old unit from supply, return, and flue. If it’s a steam system, we check the near-boiler piping, header, and equalizer sizing against the manufacturer specs, because a lot of the steam problems we see in older Andover homes are piping mistakes made decades ago, not boiler failure.
Gas boilers need proper gas line sizing run from the meter or existing branch, sized in BTU load and pipe diameter, not just tapped off the nearest line. Venting depends on the unit: older atmospheric boilers vent through a chimney liner, while high-efficiency condensing boilers vent through PVC or CPVC run to an exterior wall, with a condensate line to match. We size all of this to the boiler’s actual output, not a generic number off a chart.
Most installations mean the house is without heat and hot water (if it’s a combi or the boiler feeds an indirect tank) for the better part of a day. We plan around that. If it’s the coldest week of the year, we tell you that upfront and work to keep the gap as short as possible.
Repair or replace
This is the part most companies skip past on the way to selling a new unit, and it’s the part Chris won’t skip. A leaking gasket, a failed zone valve, a bad aquastat, or a cracked flue pipe are repairs, not reasons to replace a boiler that still has good iron in it. If your system is under 20 years old and the shell is sound, fixing what’s actually broken is almost always the right call, and we’ll say so.
Replacement makes sense when the heat exchanger itself is cracked or leaking, when the boiler is short-cycling because it’s oversized or worn out, when repair parts for an obsolete model are getting hard to source, or when the unit is old enough that efficiency losses are costing you more in fuel than a new install would cost over time. We’ll show you what we’re seeing and let you weigh it, not tell you it’s an emergency when it isn’t.
What it costs
Boiler cost depends on fuel type, BTU output, whether it’s steam or hot water, and whether the venting and gas line need updating to meet current code. A straightforward like-for-like hot water boiler swap on an existing gas line is a different job from a steam-to-high-efficiency conversion that needs new near-boiler piping and a new vent run. We walk the job in person and give you a real number before any work starts, in writing, with the reasoning behind it. We don’t quote sight unseen over the phone.
How long it takes
A standard boiler replacement, same fuel type and similar output to the old unit, typically runs one day. If the job involves re-piping steam mains, upsizing a gas line, or running new venting to the exterior, plan on it stretching into a second day. We tell you which category your job falls into during the walkthrough, not after we’ve already started.
Common Questions
Is my Andover home likely on gas or oil heat?
It depends on the block. Much of Andover has natural gas on the street, but some outlying areas are still oil or propane only. We check availability at your address before recommending a boiler type.
Can I replace an oil boiler with gas?
Yes, if gas is available at the street. It means running a new gas line sized for the boiler's BTU load and changing the venting, so it's a bigger job than a like-for-like swap, but a lot of Andover homeowners find the fuel cost difference makes it worth doing.
How do I know if my steam boiler just needs a repair?
If the boiler shell isn't cracked or leaking and the problem is a valve, gasket, aquastat, or piping issue, it's almost always repairable. We check the actual cause before recommending anything bigger.
Do you work on older cast iron radiator systems?
Yes. A lot of the historic center homes in Andover still run original or early replacement cast iron steam systems, and Chris knows how to diagnose piping issues specific to that setup rather than just swapping the boiler.
How far out do you book boiler jobs in Andover?
Reach Out for Boiler Installation and Replacement
Call {PHONE} to get a straight answer on your boiler and a real quote before anything gets torn out. We schedule Andover jobs in advance, so the earlier you reach out on a marginal system, the more choices you have when it finally does need work.
Contact information
Talk to Chris
Chris runs the plumbing and heating side of this company and he’s the one who’ll walk your basement, look at your existing boiler, and tell you straight whether it needs to go or just needs attention. No inspection fee tricks, no quota to hit. If it’s fixable, he’ll fix it. If it’s not, he’ll explain exactly why and what the replacement involves.