Rinnai On Demand Water Heater: Instant Hot Water for Your Home

Imagine having endless hot water whenever you need it—without waiting for a tank to refill. That’s exactly what a Rinnai on demand water heater delivers. Built for performance, reliability, and energy savings, Rinnai’s tankless systems are a favorite among homeowners in North Little Rock, AR and surrounding areas.

Whether you're upgrading an old system or building a new home, here’s what you need to know about Rinnai’s on demand technology.

What Is an On Demand Water Heater?

An on demand water heater—also known as a tankless water heater—heats water only when you need it. There’s no storage tank keeping water hot 24/7. Instead, cold water flows through a heat exchanger and is instantly heated as it passes through the unit.

Rinnai’s systems are known for:

• Instant heating

• Long-lasting parts

• Wi-Fi connectivity

• Energy Star® certifications

Rinnai's Approach to On Demand Hot Water

Unlike standard heaters, Rinnai’s on demand systems:

• Deliver hot water within seconds

• Eliminate standby energy loss

• Automatically adjust burner intensity to match demand

• Are designed to last 15–20 years

Why Homeowners Choose Rinnai On Demand Systems

1. Instant, Unlimited Hot Water

Perfect for families, large homes, and simultaneous appliance use.

2. Compact and Wall-Mounted

Free up garage or closet space—great for remodels and new builds.

3. Lower Utility Bills

Units only heat water when used, helping cut energy consumption.

4. Long-Term Reliability

Built with quality Japanese engineering, Rinnai systems require minimal maintenance and have a proven track record.

Popular Rinnai On Demand Models

Rinnai RU Series

• Ultra-high efficiency

• Built-in recirculation pumps available

• Ideal for 2–4 bathroom homes

Rinnai RL Series

• Affordable mid-efficiency models

• Great for smaller households

Rinnai RUR Series

• Top-tier models with Smart-Circ™ Technology

• Offers comfort and convenience without energy waste

Need help choosing? Our licensed techs at Arrow Plumbing will recommend the perfect model based on your family’s usage.

How Much Does a Rinnai On Demand Water Heater Cost?

Equipment

Prices range from $1,000–$2,800 depending on size and features.

Installation in North Little Rock

Expect labor to range from $1,200–$3,000. Price factors include:

• Indoor vs. outdoor installation

• Gas line upgrades

• Venting requirements

• Recirculation setup

We provide free, no-pressure estimates before starting any work.

Maintenance Tips for Rinnai Systems

• Flush the system once per year to remove mineral scale

• Replace water filters as needed

• Schedule a full inspection every 12–24 months

• Use a water softener in hard water zones

Arrow Plumbing offers routine maintenance packages to keep your unit running like new.

Who Should Consider a Rinnai On Demand Heater?

You’re a great candidate if:

• Your current water heater is over 10 years old

• You want to eliminate running out of hot water

• You’re looking to reduce energy bills

• You’re upgrading a large or growing household

• You’re building or remodeling and need a space-saving solution

Local Installation You Can Trust

Arrow Plumbing has installed dozens of Rinnai on demand systems across Central Arkansas. From selection to setup and support—we make the process seamless.

Contact Us Today:

• Phone: (501) 443-3515

• Address: 4007 MacArthur Dr., North Little Rock, AR 72118

• Book Online: arrowplumbing.net/contact-us

Final Thoughts

The Rinnai on demand water heater combines efficiency, reliability, and performance in one sleek unit. With expert installation from Arrow Plumbing, you’ll enjoy endless hot water and long-term peace of mind.

• Plumbing