Choosing the right pool heater is a big decision that carries a significant investment. With so many models on the market, it can be tricky to determine which brand and heater is best suited for your pool. The two leading options, Hayward and Pentair, both have advantages and disadvantages to weigh.
For most residential pools, Pentair heaters are typically the superior choice if budget allows. Their higher performance, efficiency, and reliability make them ideal for maintaining desired pool temperatures with lower operating costs.
To help make this important decision for one of your pool’s key systems, this guide compares Hayward vs Pentair heaters in depth. Keep reading to learn the key differences between these two brands in performance, features, durability, warranties, and more. Understanding these factors will ensure you select the ideal pool heater to keep your water warm and enjoyable all season long.

Hayward Pool Heaters
Hayward manufactures a variety of efficient and economical pool heaters. Their heaters use natural gas or propane with millivolt or digital thermostats. Some of their most popular models include the H150FDN, H250FDN, and H400FDN.
Cost
Hayward pool heaters tend to be more affordable than comparable Pentair models. Their millivolt units start around $1300, while digital thermostat heaters cost $1600 and up. This makes them a great option for buyers on a tight budget.
Efficiency
Most Hayward heaters offer thermal efficiencies of 83-84%. This means 83-84% of the fuel is converted to heat for the pool. Their higher-end H400FDN model boasts up to 87% efficiency. While not industry-leading, these are respectable efficiencies that can significantly cut pool heating costs compared to older or cheaper heaters.
Performance
Hayward heaters provide ample heating for small to medium-sized pools up to 20,000 gallons. Most can raise pool water temperature by 5-8°F per day. Their compact size also makes them easy to install and service. However, Hayward heaters may struggle to maintain desired temperatures in very large pools due to their lower BTU outputs.
Durability
These heaters are generally reliable and durable when properly maintained. Their heat exchangers carry warranties of 1-5 years. However, some users report issues with defective gas valves, circuit boards, and igniters requiring frequent repairs. Their longevity is not quite on par with the leading Pentair models.
Key Models
- H150FDN – 150,000 BTU, for pools up to 15,000 gallons
- H250FDN – 250,000 BTU, for pools up to 20,000 gallons
- H400FDN – 400,000 BTU, for pools up to 30,000 gallons
Pentair Pool Heaters
Pentair is the other major player in pool heating. They are known for their high-performance and extremely durable gas heaters. Their popular lines include MasterTemp, Sta-Rite, and UltraTemp.
Cost
Pentair heaters carry a premium price tag. However, their superior materials and construction make them worth the investment for larger or frequently used pools. Models start around $2000 and go up from there.
Efficiency
Pentair designed their heaters for maximum efficiency. Most models achieve 84-87% thermal efficiency for significantly lower operating costs. Their UltraTemp ETi hybrid gas/heat pump units can reach over 90% efficiency.
Performance
With BTU outputs from 150,000 to 500,000+, Pentair heaters can handle any size residential pool. Their rapid heating rates allow them to maintain precise and comfortable water temperatures. This performance does come at a higher purchase price than Hayward.
Durability
Exceptional durability sets Pentair heaters apart. Key components like heat exchangers and burner assemblies carry warranties up to 10 years. Many users enjoy over 15 years of reliable heating with minimal repairs needed.
Key Models
- MasterTemp 400 – 400,000 BTU, for pools up to 45,000 gallons
- Sta-Rite Max-E – 250,000-400,000 BTU, for pools 20,000-45,000 gallons
- UltraTemp ETi – Hybrid gas/heat pump up to 140,000 BTU, for all pool sizes
Comparing Key Features
| Feature | Hayward | Pentair |
| Cost | $$ | $$$ |
| Efficiency | 83-87% | Up to 95% |
| Heating Speed | 5-8°F/day | 8-12°F/day |
| Durability | Good | Excellent |
| Warranty | 1-5 years | Up to 10 years |
| Best For | Small pools | Large pools |
Making the Right Choice
Here are some quick tips for deciding between Hayward and Pentair based on your pool:
- For small to medium pools under 20,000 gallons, Hayward heaters provide ample performance at attractive prices.
- Larger pools over 30,000 gallons are better served by the superior heating of higher-end Pentair units.
- Choose Pentair for faster heating and maximum efficiency if heating bills are a major concern.
- Opt for Hayward if you need a basic heater on a tight budget for an average backyard pool.
- Frequent pool users should invest in a durable Pentair to minimize repairs and downtime.
- Infrequent users may prefer a more affordable Hayward if pool heating is not heavily used.
No matter which brand you select, proper installation, maintenance, and care will ensure the longest heater life span. Both Hayward and Pentair make excellent heaters that can keep your pool warm all season when matched to the right pool size.
Inquiries Addressed
What Is The Main Difference Between Hayward And Pentair Pool Heaters?
The main differences are price and performance. Hayward heaters are generally more affordable, while Pentair offers superior heating power, efficiency, and durability. Pentair heaters cost more upfront but last longer.
Which Brand Has The Better Warranty?
Pentair easily wins when it comes to warranty coverage. Most Hayward heaters have 1-5 year warranties. Pentair offers 5-10 year coverage on key components like heat exchangers to back up their reliability claims.
Can You Automate Hayward Or Pentair Heaters?
Yes, both brands offer models compatible with automation systems like Pentair IntelliTouch or Hayward OmniLogic. This allows you to precisely control and monitor your pool heater from your smartphone.
What Fuel Options Are Available?
Hayward and Pentair primarily offer gas heaters that run on natural gas or liquid propane. But Pentair’s UltraTemp ETi models can use gas, electricity, or both for maximum efficiency flexibility.
How Difficult Is It To Install These Heaters?
Most Hayward and Pentair heaters can be installed outdoors or indoors close to the pool. No special tools are needed beyond basic plumbing and gas line connections. But it helps to have a pool professional handle the complex venting and integration.
Recap
Hayward and Pentair both provide excellent options for reliable, energy-efficient pool heating. Which brand is right for you depends on your pool size, usage, budget, and heating needs. For best performance, reliability, and energy savings, choosing the properly sized Pentair heater is worth the higher initial cost. But Hayward heaters offer cheaper and simpler heating solutions for average backyard pools. Do your research to pick the ideal heater for maximizing enjoyment of your pool. We hope this comprehensive comparison has provided the guidance needed to decide between Hayward and Pentair.
Let us know in the comments if you have any other questions as you shop for the perfect pool heater. And thank you for reading!