Old Boilers in Steel-Era Homes
Short answer: older boilers and cast iron radiators can heat a house well for decades with yearly service. Know whether yours is steam or hot water, bleed radiators as needed and have the boiler checked before winter.
Request an HVAC technicianSteam or hot water
Steam systems have a sight glass showing water level; hot water systems have a pressure gauge and a circulator pump.
Bleeding radiators
Hot water radiators that stay cool at the top have trapped air. A radiator key lets it out.
Steam radiator vents
Air vents on steam radiators let air escape so steam can enter; stuck vents leave radiators cold.
Banging
Water hammer in steam pipes often means pipes have sagged and hold water.
Water level
Steam boilers need the right water level; low water can damage the boiler.
Pressure
Hot water systems should sit in the normal range on the gauge.
Leaks
Small leaks at valves get worse in winter.
Asbestos
Old pipe insulation may contain asbestos; leave it alone and ask a professional.
Replacement
A modern boiler can connect to existing radiators and pipes.
Adding AC
Ductless mini-splits add cooling without ductwork.
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