Commercial ·
Commercial Water Heater Sizing Guide for Sacramento-Area Businesses
An undersized commercial water heater costs you customers. An oversized one wastes money every month. Here is how commercial systems are sized.

Key takeaways
- Commercial systems are sized by peak demand and recovery rate, not tank size alone.
- Restaurants, salons and gyms have very different demand profiles.
- Multiple tankless units or a boiler system can provide redundancy.
Businesses depend on hot water to stay open. Choosing the right commercial water heater starts with understanding how much hot water you use at your busiest hour.
Key sizing factors
- Peak hourly demand in gallons.
- Recovery rate: how fast the system reheats.
- Required temperatures, such as sanitizing or dish machine needs.
- Fuel type and available gas or electrical capacity.
- Space and venting options.
Typical demand by business type
- Restaurants: heavy dishwashing and prep, high peaks.
- Salons and barbershops: steady use through the day.
- Gyms: large shower peaks in the morning and evening.
- Offices: light use, often served by smaller units.
- Multifamily: morning and evening peaks across many units.
Tank, tankless or boiler?
High-input commercial tanks handle large, steady draws. Racked tankless systems offer redundancy and save space. Boiler and storage systems suit large multifamily and industrial buildings.
Plan ahead to avoid downtime
We size, install and service commercial systems with minimal disruption to your business. Call HOTCO at (916) 905-4468. We answer 24/7 and serve Roseville, Rocklin, Lincoln, Granite Bay, Folsom, Sacramento and the rest of Placer and Sacramento Counties.
Frequently asked questions
- Do you install commercial water heaters?
- Yes. HOTCO installs and services commercial tanks, tankless systems and boilers across the Sacramento region.
- Can you install after business hours?
- Yes. We schedule commercial installs around your hours to minimize downtime.


