Tankless Water Heater Installation in San Francisco

Heise's Plumbing specializes in expert tankless water heater installation services in San Francisco, CA. If you want endless hot water and reduced energy bills, upgrading to a high-efficiency tankless system is an ideal solution. Our licensed technicians install top-rated brands like Rinnai and Navien, customized for your space. We handle all gas line modifications, water piping, and venting requirements to ensure a seamless upgrade.

Common Problems We Resolve

• Running out of hot water due to high household demand.
• High energy bills from storing preheated water in massive traditional tanks.
• Lack of floor space in tight urban closets or small utility zones.

How We Diagnose & Solve the Issue

Inspection & Diagnosis: We audit your electrical capacity and gas line pressure, evaluate hot water flow requirements (GPM), and select the appropriate wall-mount tankless model for your layout.

Our Service Process: We remove the old tank, install the wall-mount unit, upgrade the gas supply valves, hook up category III/IV PVC venting, and run hot water cycles to verify maximum heating efficiency.

Local Considerations in San Francisco

Upgrading to tankless in San Francisco requires careful layout calculations. Many historic homes require gas line upgrades (to a 3/4-inch supply) to support the high BTU demands of tankless units.

Why San Francisco Chooses Heise's Plumbing

Professional plumbing and heating engineering since 1954 in San Francisco. Serving San Francisco and the Peninsula since 1954, we are fully licensed and insured (CA Lic #1089561) in General Engineering, Plumbing, HVAC, and Electrical. Homeowners, building managers, and businesses trust our clean, code-compliant workmanship and transparent upfront pricing.