Quick answer
Hayward and Pentair are the two brands most pool professionals reach for first — the widest dealer networks, easy online shopping, and near-identical performance on comparable models. Raypak usually costs less at the same BTU rating and adds Wi-Fi app control across its lineup. AquaCal is the strongest pick for hot, humid, salt-heavy climates thanks to a titanium heat exchanger, and Jandy only makes sense if you’re already running its AquaLink automation ecosystem. Two Pentair-owned sub-brands, Sta-Rite and Gulfstream, sell the same engineering under different names through separate dealer channels — worth checking if your local dealer prices one cheaper than the flagship line.
Brand comparison at a glance
| Brand | Known for | Price tier | Standard warranty | Where it's sold |
|---|---|---|---|---|
| Hayward | Value gas + heat pump, easy parts sourcing | Mid | 5yr parts/2yr labor (in-ground heat pump); 10yr on the titanium exchanger tube alone | Amazon, big-box, dealers |
| Pentair MasterTemp | Quiet, efficient gas heaters + IntelliCenter automation | Mid-High | 1yr limited (online reseller); up to 3yr if bundled with other Pentair equipment | Amazon, big-box, dealers |
| Raypak | Lower price at comparable BTU, Wi-Fi via Raymote app | Low-Mid | 1-5yr depending on part | Amazon, pool suppliers |
| Jandy | AquaLink/iAquaLink automation integration | Mid-High | Varies by dealer quote | AquaLink dealer network (pricing hidden online) |
| AquaCal | Titanium exchanger, salt/humid-climate durability | High | 3yr parts/labor + lifetime on the titanium exchanger | Pool suppliers, some online |
| Sta-Rite (Pentair-owned) | MasterTemp engineering, different dealer channel | Mid | Same tier as MasterTemp | Wholesale pool dealers |
| Gulfstream (Pentair-owned) | Budget-tier heat pump, undercuts Pentair's own UltraTemp | Low-Mid | 2yr parts/labor + 7yr parts-only extended | pentair.com, dealers |
Hayward and Pentair: the two default choices
Hayward and Pentair account for most residential installs, and for good reason — both list prices openly on Amazon and big-box retailers instead of hiding them behind a dealer quote, both have deep parts networks so a repair rarely means a long wait, and both make heaters across the full range from spa-sized to large in-ground. The real difference shows up in the details: Hayward’s Universal H-Series and HeatPro do roughly 95% of what Pentair’s MasterTemp and UltraTemp do for less money, while Pentair’s equipment tends to run quieter and integrates more tightly if you’re already running an IntelliCenter automation system. Neither is a wrong choice. See our full Hayward vs. Pentair breakdown for a side-by-side on price and COP, or our full Hayward lineup roundup for every current model.
Hayward Universal H-Series gas heater
- Matches Pentair MasterTemp performance within a few points at a lower price.
- Heat pump line's titanium exchanger tube carries a separate 10-year warranty per Hayward's 2026 warranty terms.
Warranty length is the one spot where brand matters more than most buyers expect, and it isn’t consistent even within a single manufacturer’s lineup. A Pentair MasterTemp gas heater bought from an authorized online reseller carries just a 1-year parts-only warranty by default (the standard MasterTemp warranty is 2 years, reduced to parts-only for online purchases), per Pentair’s own warranty page — while Pentair’s Gulfstream-branded HE-RA heat pumps carry a standard 2-year parts-and-labor warranty plus a separate 7-year parts-only extended term, per Pentair’s current warranty table and Gulfstream product page (not the same as the general 3-year bundle program Pentair offers when a heater is purchased alongside other qualifying equipment). Hayward follows a similar split: heat pumps get a standard 5-year parts/2-year labor warranty, but the titanium heat exchanger tube inside gets its own extended 10-year term, per Hayward’s 2026 warranty documentation. In short — gas heaters run short standard warranties across every brand; heat pumps run much longer ones, usually because the compressor and titanium exchanger are the expensive parts to protect. See our pool heater warranty guide for the full brand-by-brand breakdown, including what voids coverage and why buying online can quietly shorten it.
Raypak: usually the price leader
Raypak has built pool heating equipment since 1947 and, alongside Hayward and Pentair, is one of the three brands most pool professionals install first — but it typically prices below both at a comparable BTU rating, and its Digital and AVIA gas lines add Wi-Fi control through the Raymote app standard rather than as a premium add-on. See our full Raypak roundup for current AVIA, Digital, and Crosswind V heat pump pricing.
Jandy: buy it for the automation, not the price
Jandy (owned by Fluidra, the same parent as Zodiac) makes solid JXi gas heaters and JE-series heat pumps, but its dealer network hides pricing more aggressively than Hayward or Pentair — expect a “call for price” listing and a quote request rather than an Amazon buy button. The brand mainly makes sense if you’re already running Jandy’s AquaLink or iAquaLink pool automation and want everything on one app. Full details in our Jandy pool heater guide.
AquaCal: the salt- and humidity-durability specialist
AquaCal built its reputation specifically on hot, humid, salt-chlorinated conditions — every current model ships with a titanium heat exchanger backed by its own lifetime warranty, separate from the standard 3-year parts/labor coverage (limited parts-only in years 4-5) on the rest of the unit. It’s less widely stocked online than Hayward or Pentair, so expect to shop through pool suppliers rather than a same-day Amazon order. See our AquaCal SQ125/SQ160R/SQ225 comparison and our best pool heater for salt water roundup for how it stacks up against Pentair’s cupro-nickel HD options.
Sta-Rite and Gulfstream: the same engineering, a different label
Two names on this list aren’t independent competitors at all. Sta-Rite’s Max-E-Therm gas heaters share the exact 84%/82% efficiency split as Pentair’s own MasterTemp, sold through a separate wholesale dealer channel that’s harder to price-shop online — worth checking if your local Sta-Rite dealer beats MasterTemp pricing. Gulfstream’s HE-RA heat pumps were an independent budget brand until Pentair acquired it; the lineup now sells directly on pentair.com under Pentair’s standard 2-year parts-and-labor warranty, and it still tends to undercut Pentair’s own UltraTemp at a similar COP. Neither is a red flag — both simply trade brand-name recognition for a lower price or a different sales channel.
The bottom line
If you just want a heater that’s easy to shop, easy to get parts for, and backed by a wide dealer network, Hayward or Pentair covers that with no real downside either way — see our Hayward vs. Pentair comparison to pick between them. If price matters most at the same BTU class, Raypak or the Pentair-owned Gulfstream line usually wins — and if you’re torn between Raypak and one of the big two specifically, our Raypak vs. Hayward and Raypak vs. Pentair comparisons cover those matchups directly. If you’re in a hot, humid, or salt-heavy climate, AquaCal or a titanium/cupro-nickel HD model is worth the premium — our salt water pool heater guide covers that decision in more depth. Whichever brand you land on, get it ordered with enough lead time to have it installed before you need it: try Amazon Prime free for 30 days so it ships in two days instead of a week-plus special order — and if you’re weighing a bargain private-sale unit against buying new from one of these brands, our used pool heater guide covers what that warranty coverage is actually worth giving up. Once you’ve picked a brand, our pool heater sizing chart and installation cost guide cover getting it sized and installed correctly.
Sources: Hayward Warranty, Pentair Pool Product Warranty Information, Pentair GulfStream Heat Pumps, AquaCal National Heat Pump Warranty (Rev.H, 02/2026).