Power-Vented Gas Water Heaters That Heat Fast

Power vented gas water heaters are essential for modern homes without traditional chimneys. They provide efficient hot water delivery and can significantly lower energy costs.

Choosing the right model can be overwhelming, but understanding the key features will help you make a quick decision. This guide highlights the best options available to meet your hot water needs.

Power Vented Gas Water Heater Comparison

Product	Best for	Flow Rate (GPM)	Energy Efficiency	Tank Size (Gallons)	Price
Noritz NRC66DVNG Power Vented Gas Water Heater	Best Overall	6.6	High	—	Check price
Rinnai V65EP Power Vented Gas Water Heater	Best for Small Spaces	6.5	Moderate	—	Check price
Noritz NRC111DVNG Power Vented Gas Water Heater	Best for Large Homes	11.1	High	—	Check price
Rinnai RUR98iN Ultra Series Power Vented Water Heater	Best High Efficiency	9.8	Very High	—	Check price
Noritz NRC50DVNG Power Vented Gas Water Heater	Best Budget	5.0	Moderate	—	Check price

Top Picks for Power Vented Gas Water Heaters

1

Best Overall

Noritz NRC66DVNG Power Vented Gas Water Heater

Best for: Most households needing endless hot water and energy efficiency

The Noritz NRC66DVNG features a compact design that fits small spaces while delivering continuous hot water. Its high energy efficiency reduces fuel use, making it cost-effective for daily use. It suits homes with moderate to high hot water demand.

• Flow Rate (GPM)6.6
• Energy EfficiencyHigh
• Tank Size (Gallons)—

Pros

• Compact design saves space
• Provides endless hot water
• High energy efficiency reduces fuel costs

Cons

• Installation requires professional plumber
• Higher upfront cost than standard models

Skip it if: Skip if you need a simple, low-output heater for occasional use.

Check price on Amazon

2

Best for Small Spaces

Rinnai V65EP Power Vented Gas Water Heater

Best for: Small homes or apartments with limited installation room

This model has a compact footprint and power venting that allows flexible vent placement. It delivers efficient hot water output suitable for small households. Its design is ideal where space is tight and venting options are limited.

• Flow Rate (GPM)6.5
• Energy EfficiencyModerate
• Tank Size (Gallons)—

Pros

• Compact size fits tight spaces
• Flexible venting options
• Energy efficient for small loads

Cons

• Lower flow rate than larger models
• Not ideal for large households

Skip it if: Skip if you need high hot water flow for multiple bathrooms.

Check price on Amazon

3

Best for Large Homes

Noritz NRC111DVNG Power Vented Gas Water Heater

Best for: Homes with high hot water demand and multiple bathrooms

The NRC111DVNG offers a higher flow rate to supply multiple fixtures simultaneously. Its power vent system supports flexible installation and maintains efficiency at high output. It suits larger households needing reliable hot water on demand.

• Flow Rate (GPM)11.1
• Energy EfficiencyHigh
• Tank Size (Gallons)—

Pros

• High flow rate for multiple fixtures
• Power venting allows flexible installation
• Energy efficient at high output

Cons

• Larger size requires more installation space
• Higher fuel consumption than smaller units

Skip it if: Skip if you have a small household or limited installation space.

Check price on Amazon

4

Best High Efficiency

Rinnai RUR98iN Ultra Series Power Vented Water Heater

Best for: Energy-conscious users with high hot water needs

This ultra series model features top-tier energy efficiency ratings and a condensing design that maximizes fuel use. It delivers a strong flow rate while minimizing energy waste. Ideal for users prioritizing energy savings without sacrificing performance.

• Flow Rate (GPM)9.8
• Energy EfficiencyVery High
• Tank Size (Gallons)—

Pros

• Exceptional energy efficiency
• Condensing technology reduces fuel use
• High flow rate for demanding homes

Cons

• Higher purchase and installation cost
• Requires professional installation

Skip it if: Skip if upfront cost is a major concern.

Check price on Amazon

5

Best Budget

Noritz NRC50DVNG Power Vented Gas Water Heater

Best for: Budget-conscious buyers needing reliable hot water

The NRC50DVNG provides sufficient hot water flow for small to medium households at a lower cost. It includes essential power venting features for flexible installation. This model suits buyers who want a dependable heater without premium features.

• Flow Rate (GPM)5.0
• Energy EfficiencyModerate
• Tank Size (Gallons)—

Pros

• Affordable price point
• Adequate flow rate for small families
• Power venting allows flexible vent placement

Cons

• Lower flow rate limits simultaneous use
• Less energy efficient than premium models

Skip it if: Skip if you need high flow rates or advanced efficiency.

Check price on Amazon

How to Choose the Right Power Vented Gas Water Heater

Start by identifying the best power vented gas water heater for your household. The Noritz NRC66DVNG stands out for most homes due to its compact design, endless hot water supply, and high energy efficiency.

Choosing a gas water heater depends mainly on flow rate, energy efficiency, tank size, and installation space. The flow rate, measured in gallons per minute (GPM), determines how much hot water the heater can supply at once. Match this to your household’s peak water demand to avoid running out of hot water.

Energy efficiency ratings, such as the Energy Factor (EF), show how well the heater converts fuel into hot water. Higher EF means lower fuel bills and less wasted energy. Look for models with EF above 0.7 for power vented units.

Tank size matters for storage models. Larger tanks hold more hot water but take longer to heat and use more space. Consider tankless models if you want continuous hot water without storing it.

Installation requirements include venting options and space availability. Power vented models use a fan to push exhaust gases through PVC pipes, allowing more flexible vent placement. Make sure you have enough clearance around the heater and follow local codes.

Sizing and Heat Output for Your Home

Sizing a power vented gas water heater begins with calculating your peak hot water usage. Add up the flow rates of all fixtures likely to run simultaneously, such as showers, faucets, and appliances.

Typical flow rates are 2.5 GPM for a shower, 1.5 GPM for a faucet, and 1.0 GPM for a dishwasher. For example, if two showers and one faucet run at once, the required flow rate is 2.5 + 2.5 + 1.5 = 6.5 GPM.

Compare this to the heater’s maximum flow rate. Choose a heater that meets or exceeds your calculated peak demand to avoid cold water interruptions.

Decide between tank and tankless models based on your household’s usage patterns. Tank models store hot water and deliver it until depleted, while tankless units heat water on demand without storage.

Tankless heaters suit households with variable or high simultaneous demand because they provide continuous hot water. Tank models fit homes with steady, predictable hot water use and may have lower upfront costs.

Safety Features and Certifications

Gas water heaters must have specific safety features to protect your home and family. Look for models certified by ETL or UL, which meet strict safety and performance standards. These certifications ensure the heater has been tested for electrical and gas safety.

Overheat protection is a critical feature. It shuts off the burner if the water temperature rises above a safe limit, preventing damage or fire risk. Most power vented gas water heaters include this feature, but verify it in the specifications before buying.

Proper venting is essential to safely remove combustion gases. Power vented models use a fan to push exhaust through a vent pipe, which must be installed according to the manufacturer’s instructions and local codes. Incorrect venting can cause dangerous carbon monoxide buildup indoors.

Installation safety depends on following venting requirements and using a licensed professional. The vent pipe should have the right diameter, slope, and materials to handle hot gases. Clearances to combustibles must be maintained to avoid fire hazards.

To ensure gas heater safety, install a carbon monoxide alarm near the water heater and test it regularly. Never block vents or modify the heater’s venting system. Regular maintenance, including checking the vent fan operation and inspecting for leaks, keeps the heater safe and efficient.

Running Costs of Power Vented Gas Water Heaters

The cost to run a power vented gas water heater depends on gas prices, heater efficiency, and your hot water use. Calculate running costs by multiplying your gas consumption (in therms or cubic feet) by the local gas rate. Efficiency ratings like the Energy Factor (EF) show how much fuel turns into hot water.

Tankless models heat water on demand, so they avoid standby losses common with storage tanks. This can lower running costs, especially if your household uses hot water intermittently. However, the initial cost is higher than traditional tanks.

For example, a 0.82 EF gas water heater consuming 30 therms per month at $1.20 per therm costs about $36 monthly. Improving efficiency by 10% reduces this to about $32.50. Savings add up over years, especially with rising fuel prices.

Energy-efficient models have better insulation and more precise burners. They also use power venting fans to optimize combustion. These features reduce fuel use and lower your bills. Choose a model with a high EF rating and a power vent system designed for your climate and home size.

Check your gas bills and monitor hot water use to estimate your actual running costs. This helps identify if your heater is working efficiently or if you should consider an upgrade. For more on heater types and energy use, see Which Heater Type Holds Heat Best on Low Power?.

Common Installation Considerations

Installing a power vented gas water heater requires professional expertise. These units connect to gas lines, electrical power, and venting systems that must meet local building codes. Before installation, confirm your home’s gas supply can support the heater’s demand and that you have proper electrical access for the blower and controls.

Venting is a key factor in installation. Power vented heaters use a fan to push exhaust gases through a vent pipe, allowing flexible vent placement compared to standard atmospheric models. Vent pipes can run horizontally or vertically but must terminate outdoors with a proper cap to prevent backdraft and water intrusion.

Common challenges include ensuring the vent pipe length and diameter meet manufacturer specifications to maintain proper airflow. Incorrect venting can cause poor combustion, carbon monoxide buildup, or premature component failure. Also, the vent must avoid obstructions and be insulated if passing through unheated spaces to prevent condensation issues.

Gas connections must be tight and leak-free. Use a licensed plumber or gas technician for all gas line work. Electrical wiring should be grounded and comply with the National Electrical Code. The heater’s location needs at least 3 feet of clearance around it for service access and to comply with safety regulations.

Watch for these installation pitfalls: improper venting, undersized gas lines, and poor clearance around the unit. These can cause safety hazards or reduce the heater’s lifespan. A professional installer will also check for proper combustion and install a carbon monoxide detector nearby as an added safety measure.

Frequently Asked Questions