Steam and hot water heat in old city brick is demand with no good answers online
A large share of older housing in the City of St. Louis was built around boilers and radiators, and almost nobody writes for the people who own it.
Walk a block in Soulard, Tower Grove or the Central West End and you are looking at brick houses designed for hydronic heat. The people in them search in a vocabulary that no national HVAC template uses. Knocking pipes. One cold radiator. A boiler that short cycles. Whether a hundred year old system is worth keeping.
National content answers none of that. It talks about efficiency ratings and condenser pads, which is a different house in a different climate. A page written by someone who has actually stood in one of these basements reads differently on the first paragraph, and readers can tell.
Build the cluster properly: one page on boiler repair symptoms, one on replacement and what drives the cost, one honest page on converting a radiator house to forced air and what plaster walls and solid masonry do to that job. Give the real constraints, not a sales pitch.
Competition on those terms is thinner than on furnace repair. Thin competition is not a promise of a ranking. It is a reason the page is worth writing, because you are not fighting three franchises and an aggregator for every sentence.