Water Heater Installation in San Rafael, CA
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Nine months a year of hot water demand
Water heaters in San Rafael work October through June, nine months a year. Winter nights average 43°F, and a cold tank has to work harder to bring water up to temperature every time someone runs a shower or starts the dishwasher.
Marin County has seen 122 damaging wind events over the past ten years, and statewide, 17% of California households went at least 24 hours without power in 2024. A gas water heater with a standing pilot stays lit through an outage. One with electric ignition will not fire until power is back. If you're installing new, the federal minimum efficiency isn't one number. It's set by a formula based on your tank's size, applied differently across four draw patterns, so the minimum for your household depends on how much hot water you actually use.
- 43°F
- the average winter night, and colder incoming water means longer heating
- 9 months
- October through June, the months homes here need heat
- 17%
- of California households lost power for a day or more in 2024, and a heater with an electric element or electric ignition stops without it
NOAA nClimDiv, 1991–2020 normals
A heat pump water heater would save about $780 a year to run in California compared with an electric water heater.
Estimates for a typical California home, from EIA household energy data and California fuel prices. Your home will differ.
- How do I know it's time to replace my water heater?
- Age is the biggest clue, and a contractor can tell you where your unit stands for its type. Watch for rusty water, a tank that's making rumbling or popping sounds, water pooling underneath, or water that won't get as hot as it used to. If the tank itself is leaking, that's not a repair, that's a replacement, since the tank can't be patched.
- Should I switch to a tankless water heater?
- It depends on what you want out of it, not on whether your current tank is failing. Tankless units heat water as it flows through rather than storing a tank of it, so you don't run out of hot water partway through a long shower. They also tend to last longer than tank models. What they don't do is deliver hot water instantly at every faucet, there's still a wait for it to travel through your pipes. A contractor can look at your gas line, venting, and water usage to tell you if a tankless unit fits your house.
- What changes when you install a tankless water heater?
- The biggest change is what's on your wall instead of what's on your floor. A tankless unit is a compact box mounted on the wall, not a tank that takes up closet or garage space. Because it heats water on demand instead of storing it, it often needs a larger gas line and different venting than the tank it replaces, and the electrical or gas hookup may need updating to match. Your water heater will also need service on a different schedule, since tankless units need the intake filter and internal components checked and flushed periodically to keep working the way they should.