# How we rank water heater companies

Editorial rankings follow published, weighted factors totalling 100 points. Paid sponsorship is not a factor.

- **20% — Water heater specialization & depth:** How much of the company's work is water heaters, and how wide the coverage runs: tank, tankless, heat pump, commercial, recirculation, and the gas, venting, and electrical work installs actually require. Specialists and deep multi-trade departments both score well; a company that treats water heaters as a side line does not.
- **20% — License, insurance & bonding signals:** An active CSLB contractor license in a relevant classification (C-36 Plumbing, and C-20 HVAC for heat pump work), checked against the CSLB lookup where possible. We record whether a license is CSLB-verified or only claimed on the company's own site, and we say which.
- **15% — Review strength:** Volume, recency, and consistency of customer reviews across public sources. We only publish a specific score or count when we can cite the source and date we checked it; otherwise we describe review strength qualitatively.
- **15% — Availability for urgent work:** Whether the company offers 24/7 or same-day response for failures and leaks — the situation most water heater customers are actually in. Claims come from the company's own published commitments, recorded as claims.
- **10% — Local presence & coverage:** Years serving San Diego County, a real local operation, and how much of the county the company covers — coast, inland, North County, South Bay.
- **10% — Pricing & warranty transparency:** Whether the company publishes prices, service-call fees, or clear warranty terms before you call. Publishing real numbers scores higher than "call for pricing."
- **10% — Customer support signals:** Free estimates, financing options, clear scheduling, permit handling, and haul-away — the friction-reducers that separate a smooth replacement from a long week.

Paid sponsorship is not a ranking factor for editorial picks. Where paid placement affects order anywhere on this site, that section is labeled sponsored, not editorial.

Canonical page: https://www.sandiegowaterheater.com/methodology/

## Machine-readable index

- Site index for LLMs: https://www.sandiegowaterheater.com/llms.txt
- EntityMap v1.0 (entities + sourced evidence): https://www.sandiegowaterheater.com/entitymap.json
- Agent instructions (when to use this guide): https://www.sandiegowaterheater.com/agents.md
- XML sitemap: https://www.sandiegowaterheater.com/sitemap-index.xml

_Our editorial rankings follow our published methodology. Companies cannot pay to change their editorial ranking. Some companies may pay for enhanced profiles or clearly labeled sponsored directory placements; sponsorship never affects editorial rank._

_Published by San Diego Water Heater Guide. Guide last updated June 2026._