Condensing boiler repair, replacement and high-efficiency boiler installation for radiant and hydronic heating in Marin and Sonoma County.
When the boiler stops, the house gets cold quickly. We repair condensing boilers and install high-efficiency replacements for homes in Marin and Sonoma County, including homes with radiant floor heating and cast-iron radiators.
A condensing boiler only reaches its rated efficiency when it is set up to condense. That depends on correct sizing, good controls and cool enough water returning from your radiant loops or radiators. We size the boiler to your home and commission it so it runs the way it is designed to. If your boiler is old, noisy, leaking or losing pressure, we will tell you honestly whether repair is the better move. That is the John Owens Way: maintain first, repair when needed, replace last.
Homes in Larkspur, Corte Madera, Kentfield, San Anselmo and Ross are served from our San Rafael office, and Sonoma County homes from Santa Rosa and Petaluma. Call us to talk through what your boiler is doing. Estimates on replacements and installations are free, and financing is available.
We work on the whole hydronic system, not only the boiler: pumps, controls, radiant manifolds and indirect water heaters.
Yes. Marin homes in Corte Madera, San Anselmo, Kentfield, Larkspur and Ross are served from our San Rafael office. We diagnose the problem, explain what a repair involves and tell you honestly if replacement is the better move. We explain what we find in plain terms, so you can decide what to do next.
We look at your home’s heat loss, your radiant loops or radiators, the venting and the controls. Then we size the boiler, install it and commission it so it actually condenses. Where it fits, we connect it with an indirect water heater and modern controls.
The cost depends on the boiler, the size of your home, the venting and what the existing system needs. We look at the house before giving figures. Estimates on replacements and installations are free, and financing is available. We explain what we find in plain terms, so you can decide what to do next.
Usually yes. Many homes with radiant floors or cast-iron radiators are good candidates. We evaluate your piping, emitters and venting first, then recommend a modulating condensing boiler that suits the house. We explain what we find in plain terms, so you can decide what to do next.
Once a year, ideally before heating season. Annual boiler service keeps the heat exchanger, condensate drain, combustion and controls in good shape and catches small issues before they turn into a no-heat call in winter. We explain what we find in plain terms, so you can decide what to do next.
From the Marin coast to Sonoma wine country, we bring honest plumbing, heating & cooling to homeowners across both counties — based locally since 1986.