Option 1: The Left Split
On desktop the image sits to the right with a soft edge blend into the navy content panel. On mobile, a bottom-to-top gradient lets the text sit over the image.
- Navy content panel on desktop
- Image edge-blend gradient
- Mobile-optimized overlay
Option 2: The Right Split
A mirror of the Left Split — image on the left, navy content panel on the right. The same premium gradient treatment, just flipped.
- Mirrored layout
- Works with any image
- Fully responsive
Option 3: Full Dark Overlay
An immersive, centered hero with layered directional gradients for depth. Perfect for bold, statement-making pages.
San Francisco Radiant Heating and Boiler Experts
Trusted by homeowners across the Bay Area since 2005. Licensed, insured, and factory-certified.
- Boiler Repair & Installation
- Radiant Heating Systems
- Leak Detection Devices
- Water Heater Service
Why Choose Us?
Emergency Response
Expert Installation
Residential Masters
Frequently Asked Questions
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Why San Francisco Trusts Us
Diamond Certified
Independently rated highest in quality and helpful expertise.
Eichler Experts
We are the Bay Area's premier specialists in radiant heating systems.
24/7 Dispatch
Plumbing emergencies don't wait. Our dispatch center is always open.
Google Reviews
"Hydroflow saved our weekend! We had a massive leak under the kitchen sink and they arrived within 45 minutes of my call. The technician was polite, explained exactly what was wrong, and fixed it quickly. Highly recommend their 24/7 service!"
Sarah Jenkins
2 weeks ago"As an Eichler homeowner, it's incredibly hard to find plumbers who actually understand radiant heating systems. The team from Hydroflow did a phenomenal job retrofitting our boiler. Flawless execution and zero damage to our original flooring."
Marcus Thorne
1 month ago"Professional from start to finish. They replaced our old water heater with a new tankless system. The installation is so clean it looks like art. They even cleaned up the entire garage area before leaving."
Elena Rodriguez
3 months ago"Honest pricing and no upselling. They diagnosed a tricky pipe rattle that two other companies completely missed."
David Chen
4 months ago"We manage several multi-family properties across San Francisco and Hydroflow has been our go-to plumbing contractor for three years now. Whether it's a midnight emergency or routine maintenance, they are always reliable and their communication is top notch."
Amanda Foster
5 months agoPagesBlocksLogoCloud
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What Makes a Boiler Different?
The easiest way to understand this is by comparing it to water heaters.
Standard Water Heater
- Stores 40-50 gallons
- 80% efficient
- Constant temperature
- Limited power
Tankless Water Heater
- No storage needed
- 95% efficient
- Heats on demand
- More powerful
Boiler System
- Modulates 10-100%
- 95-97% efficient
- Smart operation
- Most powerful
The Key Difference: Modulation
A boiler can "modulate," meaning it can run at 10%, 50%, or 100% power depending on demand. If you are heating your floors, it might only need to warm the water slightly. This precise control saves energy and keeps your home at a consistent, comfortable temperature.
Recent Projects
HVAC and Water Heating System Decommissioning in San Francisco
Our San Francisco team successfully decommissioned an existing split HVAC system and associated domestic hot water (DHW) piping. This project involved the careful removal and proper disposal of all designated components. The current combo boiler, dedicated solely to heating, was unaffected by this demo. We ensured a clean site, preparing the space for future system installations.
Mixing Valve Repair & Boiler Service in San Francisco
Our team recently completed an essential service call in San Francisco, addressing a leaking mixing valve and performing comprehensive annual boiler maintenance. We successfully mitigated the leak, ensuring the system operates efficiently and reliably. This proactive service helps prevent future issues and maintains optimal performance for consistent heating and hot water.
Pressure Reducing Valve and Expansion Tank Installation in San Francisco
Our plumbing experts recently installed a new pressure reducing valve (PRV) on the main water line. This critical component ensures your home's water pressure is safely regulated, protecting your entire plumbing system from potential damage due to high pressure. Additionally, an expansion tank was installed to accommodate thermal expansion, safeguarding your water heater and extending its lifespan.
Essential Radiant Heating Maintenance Tips
Keep your system running efficiently and avoid costly repairs with these expert recommendations from the Hydroflow team.
Check Your Boiler Pressure Monthly
Your boiler pressure gauge should read between 1.0 and 1.5 bar when cold. Low pressure can cause your radiators to heat unevenly, while high pressure may trigger the safety valve. Repressurize your system if needed.
Bleed Your Radiators Every Season
Trapped air in your radiators prevents hot water from circulating properly. Use a radiator key to release any trapped air at least once before winter. If the radiator is cold at the top but warm at the bottom, it likely needs bleeding.
Install a Smart Thermostat
A smart thermostat can reduce your heating bill by up to 25% by learning your schedule and adjusting temperatures automatically. Look for models compatible with hydronic systems like Nest or Ecobee.
Never Ignore Strange Boiler Noises
Banging, whistling, or gurgling sounds from your boiler can indicate limescale buildup, air in the system, or low water pressure. Address these early to prevent expensive repairs down the line.
Schedule Annual Professional Servicing
A certified technician should inspect your radiant heating system at least once a year. They'll check for leaks, test safety controls, flush the system, and ensure everything is operating at peak efficiency.