Water Heaters Types

Understanding the different types of water heaters available helps you choose the best option for your home's needs, budget, and space constraints. Each type has unique advantages in terms of efficiency, capacity, and operating costs.

Quick Comparison

Type	Best For	Price Range	Pros	Cons
Heat Pump Water Heaters	homes with a garage, basement, or utility room that stays above 40°F year-round and has enough air volume	$1,200-$2,500 for unit ($1,800-$3,500 installed, before tax credits)	2-3x more efficient than standard electric -- UEF ratings of 2.0-3.5 vs 0.9 for resistance heaters	Higher upfront cost -- $1,200-$2,500 for the unit vs $400-$800 for standard electric
Solar Water Heaters	sunny climates (Southwest, Southeast, Hawaii), homes with south-facing roofs, and homeowners planning to stay 10+ years	$3,000-$7,000 installed (before 30% federal tax credit)	50-80% reduction in water heating costs in sunny climates	Highest upfront cost of any residential water heater -- $3,000-$7,000+ installed
Storage Tank Water Heaters	most homes, budget-conscious buyers, straightforward replacement of an existing tank, and areas where gas is cheap	$400-$1,200 for unit ($700-$2,000 installed)	Lowest upfront cost -- $400-$1,200 for the unit, $300-$800 for installation	Standby heat loss -- energy wasted keeping 40-80 gallons hot 24/7 even when nobody is using it
Tankless Water Heaters	homes that run out of hot water frequently, small spaces where a tank won't fit, and households willing to pay more upfront for long-term savings	$800-$2,500 for unit ($2,000-$5,000 installed for gas, $1,500-$4,500 for electric)	Unlimited hot water -- heats on demand, never runs out as long as you stay within flow capacity	Higher upfront cost -- $800-$2,500 for unit, $2,000-$5,000 total installed (gas)

All Water Heaters Types 4

Heat Pump Water Heaters

6 min read

Heat pump water heaters (hybrid water heaters) extract heat from the surrounding air and transfer it to the water -- like a refrigerator in reverse. 2-3 times more energy efficient than conventional electric resistance heaters. They use electricity to move heat rather than generate it, which dramatically reduces operating cost. Most models include backup electric elements for high-demand periods (hybrid mode). The tradeoff: higher upfront cost, need ambient air temperature above 40 degrees F, and they cool and dehumidify the space they are in.

Best for: homes with a garage, basement, or utility room that stays above 40°F year-round and has enough air volume $1,200-$2,500 for unit ($1,800-$3,500 installed, before tax credits)

Key features:2-3x more efficient than standard electric water heaters (UEF 2.0-3.5)Heat pump extracts warmth from ambient air -- works like an air conditioner in reverseHybrid mode: heat pump for normal use, electric elements for peak demandCools and dehumidifies the surrounding space (benefit in summer, drawback in winter)Qualifies for federal tax credits and utility rebates -- often -1000+ in incentives

Pros

2-3x more efficient than standard electric -- UEF ratings of 2.0-3.5 vs 0.9 for resistance heaters
Operating cost savings of $200-$400/year vs standard electric
Federal tax credit (30% of cost, up to $2,000) plus state and utility rebates
Cools and dehumidifies the space it is in -- a bonus in garages and basements in summer
20+ year lifespan for the heat pump components with proper maintenance

Cons

Higher upfront cost -- $1,200-$2,500 for the unit vs $400-$800 for standard electric
Needs 700-1,000 cubic feet of ambient air space (roughly a 10x10 room minimum)
Does not work well in spaces below 40°F -- backup electric elements kick in and negate efficiency
Slower recovery rate than standard electric -- size up one tank tier
Cools the surrounding space -- a drawback if the unit is in a heated room in winter

Solar Water Heaters

7 min read

Solar water heaters use rooftop collectors to capture the sun energy and transfer it to your hot water supply. Two types: active (pumped) systems circulate fluid through the collectors, and passive (thermosiphon) systems rely on natural convection. Both use a storage tank and typically include a backup conventional heater for cloudy days and high-demand periods. Can reduce water heating costs by 50-80%% in sunny climates. High upfront cost, but long lifespan (20-30 years for collectors) and significant utility savings.

Best for: sunny climates (Southwest, Southeast, Hawaii), homes with south-facing roofs, and homeowners planning to stay 10+ years $3,000-$7,000 installed (before 30% federal tax credit)

Key features:Rooftop solar collectors capture free thermal energy from the sunActive systems use a pump and controller; passive systems use natural convectionDirect systems circulate potable water through collectors; indirect systems use antifreeze fluid with a heat exchangerStorage tank holds pre-heated water; backup heater boosts temperature when neededCan reduce water heating energy use by 50-80%% in sunny climates

Pros

50-80% reduction in water heating costs in sunny climates
20-30 year lifespan for solar collectors -- longest of any water heater type
Federal tax credit (30% of total system cost) plus state incentives
Zero operating cost for the solar portion -- free energy from the sun
Reduces household carbon footprint significantly

Cons

Highest upfront cost of any residential water heater -- $3,000-$7,000+ installed
Requires south-facing roof with minimal shading and adequate structural support
Backup heater still needed for cloudy days and high-demand periods
Climate-dependent -- poor performance in cloudy or cold northern regions
Maintenance includes annual glycol fluid checks and pump inspection on active systems

Storage Tank Water Heaters

4 min read

Storage tank water heaters are the standard in most American homes. A 40-80 gallon insulated tank keeps water hot and ready. Gas models heat with a burner underneath; electric models use one or two immersion elements. When you use hot water, cold water enters the bottom and is heated to the thermostat set point. Simple, reliable, affordable, and well-understood by every plumber. The main drawback: standby heat loss (energy spent keeping water hot even when you are not using it) and running out of hot water when demand exceeds tank capacity.

Best for: most homes, budget-conscious buyers, straightforward replacement of an existing tank, and areas where gas is cheap $400-$1,200 for unit ($700-$2,000 installed)

Key features:Stores 30-80 gallons of pre-heated water for immediate useGas (natural gas or propane) or electric heatingRecovery rate: gas heaters recover faster (35-45 GPH) than electric (20-25 GPH)T&P (temperature and pressure) relief valve for safetyAnode rod provides corrosion protection -- the key maintenance item

Pros

Lowest upfront cost -- $400-$1,200 for the unit, $300-$800 for installation
Simple technology that every plumber knows how to install and repair
Handles simultaneous hot water demand well (sized correctly)
No electrical upgrades or gas line upsizing needed for replacement
Parts are universal, cheap, and available at any hardware store

Cons

Standby heat loss -- energy wasted keeping 40-80 gallons hot 24/7 even when nobody is using it
Runs out of hot water when demand exceeds tank capacity (no unlimited hot water)
8-12 year lifespan -- shorter than tankless (20 years) or heat pump (15+ years)
Large footprint -- 60+ inches tall, 20+ inches diameter, needs dedicated floor space
Tank can rupture catastrophically at end of life -- 40-80 gallons of water on the floor

Tankless Water Heaters

5 min read

Tankless water heaters heat water on demand as it flows through the unit -- no storage tank. Turn on a hot water faucet and the heater fires instantly. Endless hot water as long as you are within the unit flow capacity. Gas-fired models (most powerful) handle whole-house demand. Electric models work for point-of-use (single fixture) applications. Energy savings of 20-35%% vs tank heaters because there is no standby heat loss. The tradeoff: higher upfront cost, potential for cold-water sandwich (brief cold burst between draws), and flow rate limitations during simultaneous multi-fixture use.

Best for: homes that run out of hot water frequently, small spaces where a tank won't fit, and households willing to pay more upfront for long-term savings $800-$2,500 for unit ($2,000-$5,000 installed for gas, $1,500-$4,500 for electric)

Key features:Heats water on demand -- no tank, no standby heat lossEndless hot water supply (within flow rate capacity)Compact wall-mount design saves floor spaceGas models: 8-11 GPM flow rate, handles whole-house demandElectric models: 2-5 GPM, best for single fixtures or small apartments

Pros

Unlimited hot water -- heats on demand, never runs out as long as you stay within flow capacity
20-year lifespan -- nearly double a storage tank heater
20-35% energy savings vs tank heaters (no standby heat loss)
Compact wall-mount saves floor space -- about the size of a suitcase
No risk of tank rupture or catastrophic flood

Cons

Higher upfront cost -- $800-$2,500 for unit, $2,000-$5,000 total installed (gas)
Cold-water sandwich -- brief burst of cold water between back-to-back draws
Flow rate limited -- running 3 showers simultaneously may exceed capacity
Gas models need larger gas line and new venting ($200-$1,000 in infrastructure)
Electric models may require 200-amp panel upgrade ($500-$2,000)

Which Water Heaters Type Is Right For You?

Heat Pump Water Heaters$1,200-$2,500 for unit ($1,800-$3,500 installed, before tax credits)

Best for: homes with a garage, basement, or utility room that stays above 40°F year-round and has enough air volume

Solar Water Heaters$3,000-$7,000 installed (before 30% federal tax credit)

Best for: sunny climates (Southwest, Southeast, Hawaii), homes with south-facing roofs, and homeowners planning to stay 10+ years

Storage Tank Water Heaters$400-$1,200 for unit ($700-$2,000 installed)

Best for: most homes, budget-conscious buyers, straightforward replacement of an existing tank, and areas where gas is cheap

Tankless Water Heaters$800-$2,500 for unit ($2,000-$5,000 installed for gas, $1,500-$4,500 for electric)

Best for: homes that run out of hot water frequently, small spaces where a tank won't fit, and households willing to pay more upfront for long-term savings

Frequently Asked Questions

How many types of water heaters are there?

There are 4 main types of water heaters: Heat Pump Water Heaters, Solar Water Heaters, Storage Tank Water Heaters, Tankless Water Heaters.

What is the most affordable type of water heaters?

Storage Tank Water Heaters typically offers the most budget-friendly option with prices in the $400-$1,200 for unit ($700-$2,000 installed) range.

How do I choose the right type of water heaters?

Consider your specific needs: Heat Pump Water Heaters is best for homes with a garage, basement, or utility room that stays above 40°F year-round and has enough air volume; Solar Water Heaters is best for sunny climates (Southwest, Southeast, Hawaii), homes with south-facing roofs, and homeowners planning to stay 10+ years; Storage Tank Water Heaters is best for most homes, budget-conscious buyers, straightforward replacement of an existing tank, and areas where gas is cheap.