| Model | Capacity | Features | Pros | Cons |
| Amtrol BoilerMate | 41 & 80 gallons | Poly liner, strong insulation | Reliable, retains heat well | Higher cost |
| HTP SuperStor Ultra | 20 to 119 gallons | Stainless steel, efficient exchanger | Durable, multiple sizes | Needs pro install |
| Triangle Tube Smart Series | 30 to 120 gallons | Corrugated exchanger, high efficiency | Compact, great for large families | Pricey |
| Burnham Alliance SL | 30 to 119 gallons | Hydronic exchanger, corrosion-resistant | Long-lasting, versatile | Limited availability |
So, What Exactly Is an Indirect Fired Water Heater?
An indirect fired water heater is basically a storage tank that heats water using an external source—usually your home’s boiler. Unlike the more common direct fired water heaters that have their own burner, these systems rely on the boiler to do the heavy lifting. The boiler heats a fluid, typically water or a water-glycol mix, which then circulates through a coil or heat exchanger inside the water heater tank. This process heats the water stored in the tank without the need for a separate burner.
How Do Indirect Fired Water Heaters Work?
Here’s a simple rundown of how these heaters operate:
When you need hot water, the thermostat activates the boiler. The boiler heats a fluid that warms up the water in the tank through a heat exchanger. This way, your water is ready for showers, dishes, or laundry, using the boiler’s power without extra fuel.
Why Should You Consider an Indirect Fired Water Heater?
They’re Super Efficient
One of the biggest selling points of an indirect fired water heater is its efficiency. By using your existing boiler, the system doesn’t need a separate fuel source. This setup reduces energy consumption, which is great for your wallet and the environment. Plus, fewer components mean lower maintenance costs over time.
They Last Longer
These water heaters tend to have a longer lifespan because they don’t have a burner or combustion chamber that can wear out. Also, since the tank isn’t exposed to direct flames, there’s less risk of corrosion. This durability can translate into a solid investment that lasts many years.
They’re Cost-Effective
Since the system works with your boiler, it’s especially cost-effective during colder months when the boiler is already running to heat your home. You’re basically getting your hot water “for free” whenever your boiler is on, which means lower energy bills and better overall efficiency.
You’ll Never Run Out of Hot Water
If you’ve got a big family or just really love long showers, an indirect system is a great choice. These heaters can provide a consistent supply of hot water because they’re connected to a powerful boiler. So whether you’ve got multiple people using hot water at the same time or you just like to soak in the tub, this system can handle it.
How Do Indirect Fired Water Heaters Stack Up Against Direct Fired Ones?
So, how do these compare to direct fired water heaters? Well, the biggest difference is that direct fired models have their own heat source, like a burner. Indirect models, on the other hand, use your boiler, which makes them more fuel-efficient. They also tend to last longer since there’s no direct flame exposure, which reduces the risk of corrosion. Plus, because they’re so flexible, you can install them with a variety of boiler types, whether you’ve got gas, oil, or electric.
What to Look for When Choosing an Indirect Fired Water Heater
Tank Material: Stainless Steel vs. Glass-Lined
When it comes to durability, the material of the water heater tank is crucial. Stainless steel tanks are generally more resistant to corrosion and scaling, making them a top choice if you want something long-lasting. On the flip side, glass-lined tanks offer good rust protection but might need a bit more upkeep.
Size and Capacity
Picking the right size and capacity is key to ensuring you’ve got enough hot water when you need it. If you choose a tank that’s too small, you might run out of hot water during peak times. But go too big, and you could end up wasting energy. Consider how many people live in your home and your hot water usage habits before making a decision.
Efficiency Ratings
When it comes to cutting down on energy bills, efficiency is key. Check out models with high Energy Factor (EF) ratings or those that are ENERGY STAR® certified. The better the rating, the more efficiently the heater turns energy into hot water, which means more savings for you.
Boiler Compatibility
Make sure the water heater you choose works well with your existing boiler. Some heaters are designed to be more efficient with specific types of boilers, so it’s important to check for compatibility. The right combination will ensure your system runs smoothly and efficiently.
Warranty
A good warranty is like a safety net. It gives you peace of mind knowing that if something goes wrong, you’re covered. Look for models with warranties of at least 10 years. Longer warranties usually mean better quality and value for your money.
Top Indirect Fired Water Heaters: Our Picks
Amtrol BoilerMate
If you’re looking for a reliable and efficient boiler, the Amtrol BoilerMate is a great pick. It’s got a tough polyethylene liner that resists corrosion and scaling, so you can count on it lasting a long time. Plus, it’s insulated with high-density urethane, which keeps the heat in and helps lower your energy bills. You can choose from 41 or 80-gallon models, so there’s one that’s just right for your home.
HTP SuperStor Ultra
The HTP SuperStor Ultra is all about durability, thanks to its stainless steel construction. This model also boasts a high-performance heat exchanger that ensures you always have hot water when you need it. With sizes ranging from 20 to 119 gallons, it’s perfect for both small and large homes.
Triangle Tube Smart Series
The Triangle Tube Smart Series stands out with its unique corrugated heat exchanger design, which boosts efficiency. This model is a great pick for homes with high hot water demands. It’s available in sizes from 30 to 120 gallons, so you can find the perfect fit for your household.
Burnham Alliance SL
If you’re looking for something versatile and durable, the Burnham Alliance SL is worth considering. It features a hydronic heat exchanger and a corrosion-resistant tank, making it a solid choice for long-term use. It’s available in 30, 50, 70, and 119-gallon models, so you can pick the size that best suits your needs.
Tips for Installation and Maintenance
Get It Installed by a Pro
Even if you’re handy around the house, installing an indirect fired water heater is something you might want to leave to the pros. Proper installation is crucial for ensuring your system runs efficiently and safely. Plus, a professional can make sure your new heater is compatible with your boiler and properly hooked up to your plumbing system.
Keep Up with Maintenance
To keep your water heater in top shape, regular maintenance is crucial. Try to schedule an annual check-up to catch any leaks, corrosion, or efficiency issues before they turn into major problems. If you’re dealing with hard water, make it a point to flush the tank now and then to clear out any sediment. And don’t overlook your boiler—keeping it in good condition is important for your water heater’s performance too.
Wrapping It Up
Indirect fired water heaters are a smart, cost-effective choice. They use your existing boiler, saving on energy bills and ensuring a steady hot water supply. When choosing one, just check the tank material, size, efficiency, and compatibility with your boiler.
Top models like the Amtrol BoilerMate, HTP SuperStor Ultra, Triangle Tube Smart Series, and Burnham Alliance SL each have their own unique features and benefits, so there’s sure to be one that’s perfect for your home.
Key Takeaway:
If you’re looking to cut down on your energy bills and still get hot water on demand, indirect-fired water heaters are a great option. They work with your current boiler, so they’re not only budget-friendly but also better for the environment.
FAQs
How long do indirect fired water heaters last?
On average, these heaters last between 15 to 20 years, depending on the quality of the unit and how well you maintain it.
Can I use an indirect fired water heater with any boiler?
While most of these heaters are compatible with a wide range of boilers, it’s always a good idea to double-check with the manufacturer to ensure everything will work smoothly.
How often should I flush my water heater?
It’s a good idea to flush the system at least once a year to prevent sediment buildup, especially if you have hard water.
Is it easy to install an indirect fired water heater on my own?
While it’s possible, we recommend getting a professional to do the installation. This ensures everything is set up correctly and safely.
What are some signs that my water heater needs maintenance?
If you notice inconsistent water temperatures, strange noises, or any leaks, it’s time to call in a professional for a maintenance check.