Commercial Water Heaters: What Business Owners Should Know
Joe • January 14, 2026
Choosing the Best Commercial Water Heater for Your Business

Investing in the right commercial water heater saves money, reduces complaints, and improves daily operations. Whether you're a landlord, property manager, or business owner, knowing the differences between commercial and residential units can help you make the right choice for your building or business.
In this guide, Joe the Plumber breaks down the essentials so you can find the best commercial water heater for your needs. And if you want expert guidance or a free estimate, call us at (717) 581-7407 — we serve all of Lancaster County and surrounding areas.
How do I determine the size of my current commercial water heater?
To determine the size of your existing water heater, start by checking the manufacturer’s label, usually found on the side of the unit. This label will tell you the gallon capacity and model number.
You should also take physical measurements of the unit:
Height – From base to top
Width/Diameter – Across the widest part
Installation space – Measure from floor to ceiling and note any side or overhead restrictions
These measurements help ensure your replacement unit fits in your existing space and supports your water needs.
Why does commercial water heater size matter?
If your water heater is too small, you may run out of hot water during peak hours. If it’s too large, you’ll waste money on energy bills because the system keeps water hot unnecessarily. Choosing the right size ensures reliable hot water delivery and energy efficiency.
How much hot water does a business typically need?
Hot water usage depends heavily on your industry:
- Restaurants – Use about 2 gallons per meal served. Dishwashing often accounts for 60% of usage.
- Hotels – High demand in the morning (showers, kitchens, laundry).
- Office Buildings – Low demand; mostly restrooms and break rooms.
- Gyms & Fitness Centers – High demand due to showers and locker rooms.
Understanding your business’s usage patterns helps you select the right unit size and energy source.
What types of commercial water heaters are available?
The most common types are:
- Traditional Tank Water Heaters – Store hot water in a tank and reheat when it cools. Cost-effective but can suffer from standby heat loss.
- Tankless Water Heaters – Heat water on demand. Great for saving energy but may have flow rate limitations depending on your demand.
- Hybrid Water Heaters – Combine tank storage with heat pump or other high-efficiency technologies.
- Gas vs. Electric – Gas is often more powerful for commercial use, but electric models offer easier installation and fewer emissions.
Joe the Plumber can help you decide which type fits your needs best.
Who installs commercial water heaters in Lancaster County?
Joe the Plumber offers expert commercial water heater repair, replacement, and installation services throughout Lancaster County. We help you choose the right system based on your usage, space, and budget. Call (717) 581-7407 today for a free estimate and fast service.






