Terms of Use
Effective September 4, 2026.
Calderwick is articles about hot water and steam heat plus one phone number at the top of every screen. No cart, no sign-up, no subscription: the paragraphs below are the whole understanding between reader and publication, and opening an article puts them into effect.
Who writes this, and what none of them can do
Editorial work here means burner manuals, code language, agency figures, and running the result past people who service heating equipment for a living.
Nobody on the masthead carries a heating license. No jacket gets pulled, no fitting soldered, no burner lit by anyone at this desk. Reading comes from Calderwick; the wrench belongs to the trade.
Articles describe equipment, not your basement
Pages here treat hydronic heat as a class of machinery: what makes a zone go cold, how a circulator shifts water, what an oil burner wants before the first hard freeze. The subject is houses at large, not the one you are keeping warm.
Your gauge has gone unread here, along with your sight glass, wiring and flue. Identical symptoms trace back to opposite faults, since a 1920s steam main misbehaves in ways a wall-hung condensing unit never will.
Treat none of it as legal, insurance or engineering advice. A sentence that turns a step over to a professional draws the boundary of the homeowner's share on purpose.
Safety outranks anything written on this site
Several situations wipe out every recommendation here: a carbon monoxide alarm sounding, gas or fuel oil you can smell, a relief valve that keeps letting go, standing water near electrical gear, or a gauge needle pinned past its scale.
Get people out of the building, phone 911 and the fuel supplier from outdoors, and keep the system cold until a licensed professional has looked at it. Headaches, nausea, dizziness or muddled thinking in a house with fuel-burning appliances mean fresh air first and emergency medical attention right behind.
No article here is a reason to sit on a problem like that until the weekend, until payday, or until the last paragraph.
Every dollar figure is research, not a bid
Price bands trace back to something named and dated: cost research, a permit schedule, a fuel price series, or the spread partner contractors report from jobs they invoiced. That sourcing is there to be checked.
None of it is a quote on your house. Heating work gets priced once somebody has counted zones, measured the vent and seen what the near-boiler piping will put up with. Compare a proposal against replacement pricing and what an annual visit covers, then make the contractor put a firm number on paper.
Whoever answers the phone works for themselves
Dial (800) 555-0163 and the call lands with an independent company licensed for heating work in the caller's area, oil burner and HVAC technicians included, because those are the trades keeping hydronic equipment alive across the Northeast.
Such a company employs nobody here and speaks for nobody here. Calderwick assigns them no jobs, sets no rates, oversees no work and warrants none of it.
Say yes to a proposal and the agreement belongs to the two of you alone: scope, materials, permits, price, warranty, dates, any argument growing out of them. Ask to see the license number and proof of current insurance first, and verify it with your state board.
Signed work from one of these calls obliges that contractor to pay Calderwick a referral fee. The payment sits on the contractor's side, the caller's invoice does not rise because of it, and no amount of money buys a mention in an article.
Copyright in the text and the drawings
Articles, cost tables, diagrams and images here belong to the publisher under United States copyright law. Every image on this site came out of a generative model, and every file says so in its own metadata. Nothing here was photographed on a job.
Borrowing a line or two with attribution and a live link is welcome, as is emailing one to a neighbor with a cold baseboard. Written permission comes first for anything larger: reposting a piece whole or thinly reworded, redrawing the diagrams under a different name, or waving a price band around as though some contractor had priced the job.
Conduct that closes access
Print what helps, bookmark what helps, hand a paper copy to whoever holds the flashlight.
Access ends without warning for scraping heavy enough to strain the server, probing the site for vulnerabilities, ringing the helpline to harass whoever answers, or phoning in fake calls that pull a technician from a house with no heat.
Outbound links point at sources
A citation to the Department of Energy, a licensing board, a code body or a manufacturer manual is linked so the claim can be inspected at its origin. Other organizations own those addresses and rewrite, relocate and monitor them as they like; such a link is no recommendation of the site behind it.
No guarantees attached
Numbers get verified against the source beside them and corrected once an error surfaces. Diligence still falls short of a warranty: code language changes, manufacturers revise specifications, and a fix that suits one system does damage on the next. Accuracy, completeness, freshness, fitness for your equipment and uptime are none of them promised.
The ceiling on damages
Within whatever limits the law sets, neither this publication nor anyone writing or editing for it bears responsibility for consequential, incidental, indirect, special or punitive losses from an article here or a call made through this line. A zone that froze, a cracked section, a soaked floor, a motel bill during a cold snap and every contractor invoice fall inside that sentence.
Any liability that survives stops at the amount this publication has charged you for access, namely nothing. Certain states will not enforce a bar drawn this wide; there, the local rule prevails.
Governing law
United States law applies, alongside the law of the publisher's home state, with its choice of law provisions set aside. No single courthouse gets named: doing so would push readers toward a forum this publication cannot honestly claim. Whatever protections your state hands consumers outlive this page, small claims included.
Edits, and where a question goes
Revisions are expected. Rules tighten as the archive fills out, and the date at the top moves along with them. No notice goes out, the version on screen is the operative one, and reading on after an edit adopts it.
Send anything unclear above to [email protected]. A boiler that has already died deserves the phone instead: (800) 555-0163 stays staffed overnight all through the winter.