May 14, 2026
Picking the Best Water Heater: A Family Survival Guide
Why Knowing How to Choose the Right Water Heater Matters for Your Home
Knowing how to choose the right water heater is one of the most important decisions you can make for your home’s comfort and your family’s budget. Water heating accounts for nearly 18% of your home’s total energy use — making it the second-largest energy expense after heating and cooling. Yet most homeowners only think about their water heater when it stops working.
Here in Des Moines, that month often comes at the worst possible time — a freezing January morning, right before guests arrive, or when back-to-back showers leave everyone cold. The good news? You don’t have to wait for a crisis. This guide walks you through everything you need to make a smart, confident decision before your current unit lets you down.
How to choose the right water heater — quick answer:
- Identify your fuel source — natural gas, electric, or propane
- Choose a type — storage tank, tankless, heat pump, or solar
- Size it correctly — 10–15 gallons per person for tanks; match GPM rating for tankless
- Check efficiency ratings — look for the Uniform Energy Factor (UEF) and ENERGY STAR certification
- Consider your space — measure your installation area and check venting or electrical requirements
- Plan for local conditions — Des Moines hard water and cold winters affect performance and maintenance needs
- Look for incentives — federal tax credits and utility rebates can offset upfront costs for high-efficiency models
This guide covers all of these steps in detail — so whether you’re replacing a failing unit or planning ahead, you’ll know exactly what to look for.
Understanding the Main Types of Water Heaters
When it comes to how to choose the right water heater, the first step is understanding the technology available in April 2026. The industry has shifted significantly toward high-efficiency models, but the “best” type depends entirely on your household habits and existing infrastructure.
Storage Tank Water Heaters
These are the most common units found in Iowa homes. They keep a ready reservoir of hot water (typically 30 to 80 gallons) in an insulated tank. When you turn on the tap, hot water is pulled from the top of the tank.
- Pros: Lower upfront cost and simpler installation.
- Cons: They suffer from “standby heat loss” because they heat the water even when you aren’t using it. Once the tank is empty, you have to wait for it to refill and reheat.
Tankless (On-Demand) Water Heaters
Unlike tanks, these units heat water directly using high-powered burners or electric elements as the water flows through the device. For a deeper dive into this technology, check out our Tankless Water Heaters Complete Guide.
- Pros: They provide a continuous supply of hot water and take up significantly less space (they are wall-mounted.)
They also last about 20 years, nearly double the lifespan of a traditional tank. - Cons: They have a limited flow rate (gallons per minute.) If you try to run the shower, the dishwasher, and the laundry all at once, the temperature might drop.
Heat Pump (Hybrid) Water Heaters
These are the “superstars” of efficiency. Instead of generating heat directly, they move heat from the surrounding air into the water. They are often 2 to 4 times more energy-efficient than standard electric heaters.
- Pros: Massive energy savings and they can actually dehumidify the space they are in.
- Cons: They require more physical space (usually 1,000 cubic feet of air space around them) and can be noisier than other models.
Solar Water Heaters
These use roof-mounted collectors to absorb the sun’s energy. While less common in the Midwest compared to the Southwest, they are the most environmentally friendly option. They typically require a backup system (gas or electric) for those cloudy Des Moines winter days.
To see all the options we offer, visit our main Water Heaters page.
How to choose the right water heater for your family size
Sizing is where most homeowners make mistakes. If you buy a unit that is too small, you’ll be shivering in the shower. If it’s too large, you’re paying to heat water you’ll never use.
| Household Size | Recommended Tank Capacity (Electric) | Recommended Tank Capacity (Gas) |
|---|---|---|
| 1–2 People | 30 Gallons | 30 Gallons |
| 2–3 People | 40 Gallons | 40 Gallons |
| 3–4 People | 50 Gallons | 40–50 Gallons |
| 5+ People | 80 Gallons | 50+ Gallons |
When looking at tanks, pay attention to the First-Hour Rating (FHR.) This tells you how many gallons of hot water the unit can deliver in one hour starting with a full tank. For tankless units, you focus on Gallons Per Minute (GPM.) A typical shower uses about 2 GPM.
If you want to run two showers at once, you need a unit rated for at least 4.5 to 5 GPM. For more localized advice, see our Best Tankless Water Heaters Des Moines IA Guide.
Comparing tank vs. tankless performance
The “Tank vs. Tankless” debate usually comes down to lifestyle.
- Continuous Flow: Tankless wins here. You can take a two-hour shower and the water will stay hot.
- Recovery Time: Tanks take time to “recover” once depleted. In the winter, when Des Moines groundwater is near freezing, a tank might take 40–60 minutes to get back to temperature.
- Space Savings: Tankless units are about the size of a suitcase and mount on the wall, freeing up floor space in your basement or utility closet.
- Lifespan: You can expect 10–15 years from a tank, but 20+ years from a well-maintained tankless unit.
Key Factors in How to Choose the Right Water Heater
Beyond the type of heater, several technical factors will influence your decision. We’ve detailed many of these in our post on Top Factors to Consider When Choosing a Water Heater for Your Des Moines Home.
Fuel Types
- Natural Gas: Generally faster at heating water and cheaper to operate in our area. It does require proper venting to the outside.
- Electric: Easier to install and doesn’t require a chimney or vent, but usually has higher monthly operating costs.
- Propane: A great alternative for rural homes around Indianola or Mitchellville that don’t have natural gas lines.
Energy Efficiency and UEF Ratings
The Uniform Energy Factor (UEF) is the standard way to measure efficiency. The higher the number, the more efficient the unit. ENERGY STAR certified models are tested to meet strict environmental and performance standards. Switching to a high-efficiency heat pump model can save a family of four hundreds of dollars a year on utility bills.
Smart technology and how to choose the right water heater features
Modern water heaters are smarter than ever.
Look for these features:
- Wi-Fi Connectivity: Control the temperature from your phone or set a “vacation mode” while you’re away from home.
- Leak Detection: Some units have built-in sensors that alert your smartphone the second they detect moisture.
- Automatic Shut-off: In the event of a leak, these valves automatically cut the water supply to prevent a flooded basement.
Evaluating space and installation requirements
Before you buy, grab a tape measure. Newer, high-efficiency tanks are often 1–2 inches wider than older models because they have thicker insulation.
- Lowboy/Short Models: These are wider and shorter, perfect for crawlspaces or under-counter installations.
- Tall Units: Standard for basements where height isn’t an issue.
- Venting: If you switch from a standard gas tank to a high-efficiency condensing model or tankless unit, you may need to install new PVC venting.
- Electrical Capacity: Switching to a tankless electric unit often requires a significant upgrade to your home’s electrical panel (sometimes requiring 3 or 4 dedicated 40-amp breakers).
Ensuring your installation meets local standards is vital for safety, which is why we emphasize Water Heater Code Compliance.
When to Replace Your Current System
We always recommend being proactive. Waiting for a tank to burst is a recipe for property damage and high-stress decisions.
Signs Your Water Heater Is Going Out
- Age: Most tanks last 10–12 years. If yours is over 10, it’s on borrowed time.
- Rusty Water: If hot water comes out brown or orange, the tank is likely corroding from the inside.
- Noises: Popping or rumbling sounds indicate sediment buildup at the bottom of the tank.
- Frequent Repairs: If you’re calling us every few months for a new heating element or thermostat, it’s time to move on.
For a full checklist, see our Water Heater Replacement Guide and our list of Signs Your Water Heater Is Going Out.
Proactive steps before a water heater replacement
Before the “big day,” it helps to have a professional inspection. We can assess your current venting, gas lines, and water quality to see if a different type of heater might serve you better. Understanding How Long Does a Water Heater Last can help you budget for the future. You can also review our Steps Before a Water Heater Replacement to ensure a smooth transition.
Maintenance and Longevity in Des Moines
Des Moines is known for having relatively hard water. This mineral content is the “silent killer” of water heaters.
- Annual Flushing: For tank models, flushing the tank once a year removes sediment that settles at the bottom. If left alone, this sediment acts as an insulator, making the burner work harder and eventually cracking the tank.
- The Anode Rod: This is a “sacrificial” rod inside the tank that attracts corrosive elements so they eat the rod instead of the tank. It should be checked every 2–3 years.
- Tankless Descaling: Tankless units need to be flushed with a descaling solution to keep the heat exchanger clear of calcium buildup.
If you start noticing lukewarm water or reduced pressure, it might be time to check for Signs You Need Water Heater Repair.
Impact of Iowa winters on performance
Our winters change the math on hot water. In the summer, the water coming into your home might be 60°F.
In the middle of an Iowa January, it can drop to near 35°F.
- Recovery Delays: Your heater has to work much harder to raise the temperature by 85 degrees instead of 60.
- Thermal Expansion: As water heats, it expands. If you have a “closed system,” this can put stress on your pipes. We often recommend an expansion tank to handle this.
- Pipe Protection: Ensure pipes in unheated areas like crawlspaces are properly insulated to prevent freezing and heat loss.
Frequently Asked Questions about Water Heaters
Is a tankless water heater better for a large family?
It depends on how you use water. If your family takes showers one after another (staggered), tankless is amazing because it never runs out. However, if you have three people showering at the exact same time in different bathrooms, a standard tankless unit might struggle to keep up with the GPM demand. In those cases, a high-capacity tank or a “cascaded” tankless system (two units working together) is better.
How does hard water affect my choice?
Hard water creates scale. In a tank, this leads to sediment buildup. In a tankless unit, it can clog the narrow passages of the heat exchanger. If you have hard water, we strongly recommend a water softener to protect your investment. Without one, you’ll need to perform maintenance much more frequently to avoid a breakdown.
Are there incentives for high-efficiency models?
Yes! As of April 2026, there are significant federal tax credits available for ENERGY STAR certified heat pump water heaters (often up to $2,000.)
Many local utility providers in the Greater Des Moines area also offer rebates for switching to high-efficiency gas or electric models. These incentives can significantly lower the effective cost of an upgrade.
Conclusion
Choosing the right water heater doesn’t have to be overwhelming. By considering your family’s size, your home’s fuel source, and the unique challenges of our Iowa climate, you can ensure your home stays comfortable for years to come.
At True Comfort Heating, Cooling and Plumbing, we treat our customers like family. Whether you are in Ankeny, Waukee, or right here in Des Moines, we provide honest assessments and dependable service. We even offer flexible maintenance plans where your fees can be credited toward new equipment in the future.
Don’t wait for a cold shower to start the conversation. Schedule your water heater consultation today and let us help you find the perfect fit for your home.