Water Heaters Buying Checklist Printable Updated March 2, 2026 Use This ChecklistPrint this checklist before shopping for Water Heaters. It covers everything from choosing the right type to avoiding common mistakes. Print This Checklist Research PhaseResearch the 4 types of water heaters availableStandard Electric Tank (Best Budget Option)Heat Pump Hybrid (Best Overall Value)Electric Tankless (Best for Space Savings)Why Cold Climate Changes EverythingGas Tankless: The Only Real Option for Whole-HouseElectric Tankless: Not Recommended for Whole-HouseCompare prices across at least 3 brandsRead warranty terms before purchasingCheck compatibility with your existing plumbing Shopping TipsHeat pump water heaters are the best long-term value for electric homes. The federal tax credit makes them cost-competitive with standard electric tanks upfront, and they save $200-$400/year in operating costs.Electric tankless in cold climates (Northeast, Midwest) is generally not recommended for whole-house use. The incoming water temperature is too low for the unit to deliver adequate flow to multiple fixtures simultaneously.If your home has both 240V capacity and space for a tank, heat pump hybrid is almost always the better choice over standard electric. The payback period is 3-5 years with the tax credit.Calculate your actual temperature rise: check your incoming water temperature in January (run the cold tap and measure with a thermometer). Subtract from 120°F. That is your temperature rise. Look up the unit's GPM at THAT specific rise, not the headline number.The Navien NPE-240A with built-in recirculation is the top pick for cold-climate homes. The recirculation keeps hot water in the pipes, eliminating the cold-water sandwich and reducing wait time at distant fixtures.Pair a tankless unit with a small buffer tank (2-5 gallons, $100-$200) to eliminate cold-water sandwiches. The buffer tank stores a few gallons of hot water that bridges the gap between draws while the tankless fires up.Gas tank heaters recover 2x faster than electric. If you have a gas line, a 50-gallon gas tank ($500-$700 installed) beats a 65-gallon electric ($400-$600 installed) in real-world performance for a family.Stagger showers by 15-20 minutes if your heater is borderline. A 50-gallon gas tank recovers 35-45 gallons per hour -- even a short break between showers helps.If you are replacing an existing tank that runs out of hot water, check for sediment first. A 50-gallon tank with 10 gallons of sediment acts like a 40-gallon tank. Flushing may solve the problem without buying a bigger unit.Use first-hour rating (FHR), not just tank size, to compare.Cold climates need tankless sized for higher temperature rise.Heat pump water heaters recover slower -- size up.Do not compare just the unit prices. Compare total installed cost over a 15-20 year period including energy, maintenance, and replacement.If you have natural gas, gas tankless is the strongest performer. Electric tankless struggles with whole-house demand in cold climates because incoming water is too cold.Heat pump water heaters are a third option worth considering. They use 60% less electricity than standard electric tanks, qualify for a 30% federal tax credit, and have a 15+ year lifespan.Budget installation cost equal to unit cost for tank replacements.Get 2-3 quotes -- prices vary significantly.Ask about permits. Many areas require them.Heat pump offers lowest operating cost of any electric option.Compare annual operating cost on EnergyGuide label, not just purchase price.Federal tax credits can reduce heat pump cost to near-standard electric prices.Gas tank or tankless is most cost-effective where gas is available.Heat pump is worth the premium -- pays back in 3-5 years.Stick with current fuel type unless compelling reason to switch. Mistakes to AvoidBuying a standard electric tank when a heat pump hybrid is available and your space qualifies. The operating cost difference is $200-$400/year -- the standard tank costs more over 5 years even though it is cheaper to buy.Choosing whole-house electric tankless without checking panel capacity first. A panel upgrade adds $500-$2,000 to the project and may not be worth it.Sizing an electric tank by gallon capacity alone. Electric tanks recover slower than gas (20-25 GPH vs 35-45 GPH). A 50-gallon electric does not perform the same as a 50-gallon gas -- you may need a 65-80 gallon electric for the same household.Buying a tankless based on the headline GPM spec without calculating the temperature rise for your climate. A '9.8 GPM' unit in Minnesota delivers 5 GPM when it matters most.Choosing an electric tankless for whole-house use in a cold climate. The math does not work -- you will run out of hot water during simultaneous use.Installing a non-condensing unit when a condensing model costs $100-$300 more. The venting savings alone often make condensing cheaper to install.Buying a tank based only on gallon capacity without checking the first-hour rating. A cheap 50-gallon with a 45-gallon FHR will not keep up with a family of four during peak hours.Choosing an electric tankless for a whole-house application in a cold climate. Incoming water at 40°F requires too much heating -- the unit cannot deliver enough GPM.Not accounting for a new dishwasher or shower head that uses more water than the old one. Usage changes over time.Sizing by tank gallons alone -- FHR matters more.Buying tankless sized for warm climate in a cold climate.Replacing 40-gal with 40-gal without checking if the old one was adequate.Choosing tankless solely based on 'unlimited hot water' without budgeting for the 2-3x higher installation cost.Choosing a tank solely based on lower upfront cost without considering that you will buy two tanks in the time one tankless lasts.Sizing a tankless by tank-gallon equivalents instead of GPM flow rate. A 'tankless equivalent to 50 gallons' is marketing, not engineering.Budgeting for unit only and being surprised by installation cost.Choosing cheapest plumber without verifying licensing.Not budgeting for code-required upgrades.Buying cheapest heater without considering operating cost.Comparing UEF across fuel types -- electric UEF is naturally higher but electricity costs more per BTU usually.Ignoring tax credits and rebates.Switching gas to standard electric to save purchase price -- operating cost erases savings.Standard electric over heat pump when you have the space.Not accounting for venting costs when comparing gas to electric. Installation PrepAssess difficulty level: Reference guideBudget for installation: See breakdown belowHave ready: Pipe wrenches and adjustable wrenchesHave ready: Pipe cutter and fittingsHave ready: Thread seal tape and pipe dopeAssess difficulty level: Intermediate to AdvancedBudget for installation: $100-$300 DIY / $800-$2,500 with pro Helpful ResourcesComplete Water Heaters GuideEverything in one placeWater Heaters TypesCompare all typesCost GuidesBudget planning See AlsoHeat Pump Water HeatersBest Electric Water HeatersWater Heater Installation CostsNew Water Heater Cost (Including Installation)How to Adjust Water Temperature
