GulfStream HE125-RA Heat-Only Pool Heat Pump
The middle of the GulfStream line: a typical Gulf Coast residential pool that gets swum in most of the year and does not need the water chilled.
Electric heat pump
SKU HE125-RA
- Heating capacity
- 118,000 BTU/hr
- Fuel / power
- Electric
- Efficiency (COP)
- COP 6.0 at 80°F air / 80°F water / 80% relative humidity (AHRI)
- Heat exchanger
- Titanium
- Warranty
- Parts: 7 years · Labor: 2 years
- Controls & automation
- Digital LCD controller with plain-language status and fault messages, separate pool and spa setpoints and keypad lockout; automation through dry-contact remote thermostat terminals only.
Modern Pool Heating Equipment Score
Our score for the equipment itself. It is not a Google or customer review rating.
How we rate heatersFull specifications
Every row below is taken from a manufacturer document. Anything the manufacturer does not publish is left out rather than estimated.
| Heating capacity | 118,000 BTU/hr at 80°F air / 80°F water / 80% RH |
|---|---|
| COP | 6.0 at 80/80/80; manufacturer states all models meet or exceed COP 4.0 at the AHRI low (50/63/80) test point |
| Heat or heat and cool | Heat only (RA); the HE125-TA is the reverse-cycle version |
| Heat exchanger | Titanium, 2-inch full-flow |
| Cabinet | UV-stabilized ABS, no rust |
| Electrical | 208-230V, 1 phase, 60 Hz |
| Minimum circuit amps / maximum breaker | 37 A minimum circuit amps, 50 A maximum breaker |
| Water connections | 2" unions |
| Water flow | 30 GPM minimum, 70 GPM maximum, 45-50 GPM optimal |
| Clearances | 12" each side, 4 ft above; outdoor installation only |
| Operating temperature | Defrost cycle below 48°F ambient; will not operate below 35°F |
| Condensate | Up to 3 gallons per hour per the owner's manual |
| Dimensions and weight | 31 x 31 x 46 in, 237 lb |
| AHRI rating | Rated at the AHRI 80/80/80 point; the spec sheet states all models meet or exceed COP 4.0 at the AHRI low (50/63/80) test point |
| Manufactured in | North Fort Myers, Florida (G&F Manufacturing) |
| Controls and automation | Digital LCD display with plain-language status and fault messages, dual pool/spa thermostats, keypad lockout, spa timer and multi-language menus; automation through dry-contact remote thermostat terminals. No RS-485 connection, no published app or Wi-Fi control. |
Why homeowners consider it
- 118,000 BTU/hr at the 80/80/80 test point covers most ordinary Sarasota-area pools without stepping up to the largest unit in the line or the breaker that comes with it.
- It makes more heat than the equivalent heat/cool model. The HE125-TA is rated at 115,000 BTU/hr on the same spec sheet, because the reversing-valve hardware costs a little capacity — if you will never chill the pool, the heat-only version is the better buy of the two.
- The titanium heat exchanger and UV-stabilized ABS cabinet are standard. On a salt pool, or on a lot close to the water, that is the single most useful thing about this heat pump.
- 7 years parts and 2 years labor is published on the sell sheet, the product page and this SKU's page, and the sell sheet states there are no trip charges during the labor period.
- Electrically it is modest for its size: 37 minimum circuit amps on a 50 amp maximum breaker, the same as the 138,000 BTU HE150-RA.
What to know before buying
- It is heat only. The chiller components have to be ordered and built into the unit, so a heat-only HE125-RA cannot be converted later. Pentair's SKU pages carry identical line-level copy on every GulfStream model, including a reference to "heating and cooling functionality" on the heat-only SKUs — the spec sheet and the product-page table are the authority and list HE125-RA as heat only.
- Water flow has to land in the window: 30 GPM minimum, 70 GPM maximum, 45-50 GPM described as optimal. On a variable-speed pump the heating speed has to be programmed to satisfy that, and the manual's troubleshooting section says to expect about 40-50 GPM through the unit.
- Clearances are not negotiable — 12 inches on each side, four feet above, outdoor only. The installation manual warns that enclosed spaces such as sheds or garages without proper ventilation may void the warranty on the refrigerant components, and that overhangs which recirculate cold air will push the unit into defrost.
- Plumbing order is a warranty condition: pool pump, filter, heat pump, solar, then chlorinator or salt cell, then the pool. Never upstream of the heat pump.
- The manual publishes a water chemistry window — pH 7.4-7.6, free chlorine 1-3 ppm in a pool, total alkalinity 100-120 ppm, calcium hardness 200-400 ppm, total dissolved solids under 2,000 ppm. Titanium is forgiving, but chemistry damage is a warranty exclusion for every manufacturer we have read.
- Automation is dry-contact only — no RS-485, no published app or Wi-Fi control. It will take a setpoint from an AquaLink or AquaLogic system, but it does not appear in the app as a networked device.
Warranty, term by term
The warranty only matters on the parts that actually fail. Here is how this one splits up.
- Parts
- 7 years
- Labor
- 2 years
Pentair publishes 7 years parts and 2 years labor for GulfStream on the sell sheet, the GulfStream product page and this SKU's own page, and the sell sheet adds that there are no trip charges during the labor period. Pentair's cross-brand warranty table contradicts that: it lists "GulfStream Heat Pump" at 2 years and "GulfStream Heat Pump (Parts)" at 3 years. We could not reconcile the two, so get the current terms in writing before you buy. No separate heat-exchanger term is published — the titanium exchanger is covered under the parts warranty — and the manual states that warranty service must be handled by an authorized service center. Pentair lists GulfStream in the in-ground equipment section of its warranty page, and the channel rule stated there governs everything on it: the published term runs only when the equipment is bought from a brick-and-mortar retailer, pool builder or pool service company and installed by a qualified professional who charges a fee for their services, while a unit bought from an internet retailer receives a one-year parts-only warranty with no labor coverage at all. Professional installation / authorized-channel requirements may apply.
Why the heat exchanger matters
The heat exchanger is the part of a pool heater that actually moves heat into the water, and what it is made of decides how long the heater survives Florida water chemistry. Here is what the four materials mean in practice.
- Copper
- The traditional material and the cheapest to build. It transfers heat well and is fine on a well-balanced chlorine pool, but it is the least forgiving of low pH, high chlorine and salt. On the Gulf Coast it is usually the first component to fail.
- Cupro-nickel
- Copper alloyed with nickel. It gives up a little heat transfer in exchange for much better resistance to unbalanced water chemistry and salt. On gas heaters this is the upgrade worth having in Florida, and some manufacturers now ship it as standard.
- NiTek (nickel alloy)
- A nickel-alloy exchanger used on some gas heaters as a corrosion-resistant alternative to copper. Positioned between cupro-nickel and titanium in both durability and price.
- TitaniumThis heater
- Effectively immune to pool water chemistry, including salt. It is the standard on quality pool heat pumps and the reason a heat pump can sit on a salt pool for years without exchanger trouble. It is expensive, which is why you rarely see it on gas heaters.
Whatever the material, plumbing order matters just as much: a chlorinator or salt cell belongs downstream of the heater, never upstream.
How we scored it
- Warranty is 7 years parts and 2 years labor with no trip charges, marked down half a point because Pentair's cross-brand warranty table lists much shorter GulfStream terms.
- Titanium exchanger in a non-metallic cabinet is the best durability combination available for salt pools and coastal air, so durability scores a full 5.
- COP 6.0 at 80/80/80 with a stated floor of 4.0 at the AHRI low test point is at the strong end of the category; capacity is mid-line rather than class-leading.
- Serviceability is helped by the units being built two hours away in North Fort Myers and hurt by the requirement to route warranty work through an authorized service center.
- Controls lose ground for dry-contact-only automation and no published app: the onboard diagnostics are good, the connectivity is not.
- Value is strong — it is the mid-size unit at the mid-size price, and it produces 3,000 BTU/hr more than the heat/cool HE125-TA for less money if you do not need chilling. The weighted score sits below the 4.8 starter score in the owner's comparison guide because of controls and the unresolved warranty conflict.
What third-party reviews say
Outdoor Direct (retailer) — GulfStream line rating, not this SKU alone
4.9/5 from 34 reviews
Retailer sample, not a manufacturer or independent rating. The HE125RA listing on Outdoor Direct showed 4.9/5 from 34 reviews, 94% of them five stars (32 of 34) and the remaining two at four stars. The same 4.9 from 34 reviews appears on every GulfStream listing in that store, so treat it as feedback on the retailer's GulfStream sales overall rather than on this specific model. The retailer also lists this unit at 125,000 BTU; Pentair's own spec sheet says 118,000 BTU/hr at the 80/80/80 test point, and the manufacturer figure is the one we use.
Checked September 17, 2026View the source
These are other people’s numbers, quoted as published. They are not folded into the Modern Pool Heating Equipment Score and they are not in this page’s structured data. How we rate heaters.
Real Modern Pool Heating installations
Installed locally, researched for everyone
Affordable Solar & Pool Heating, LLC installs and services pool heating in Sarasota, Manatee, Charlotte & Pinellas County, Florida. If you are outside that area this page is still yours to use — take the questions on it to your local contractor. Pool heater installation in Sarasota.
Other heaters worth putting beside it
Same job, different tradeoffs. Every one of these has its own verified spec page.
GulfStream · GulfStream HE Series
GulfStream HE150-RA Heat-Only Pool Heat Pump
Model HE150-RA
- Heating capacity
- 138,000 BTU/hr
- Efficiency (COP)
- COP 6.0
- Heat exchanger
- Titanium
- Warranty
- 7-Year Parts / 2-Year Labor
- Wi-Fi / automation
- Automation Compatible (Relay)
A large or exposed Gulf Coast pool that needs the most heating capacity in the GulfStream line and has no use for chilling.
Hayward · HeatPro MCHX Series
Hayward HeatPro MCHX HP21405T Heat-Only Pool Heat Pump
Model HP21405T
- Heating capacity
- 138,000 BTU/hr
- Efficiency (COP)
- COP 5.7
- Heat exchanger
- Titanium
- Warranty
- 5-Year Parts / 2-Year Labor10-Year Heat Exchanger
- Wi-Fi / automation
- Automation Compatible (Relay)
A Gulf Coast pool that gets swum in most of the year and an owner who wants the lowest running cost from a mainstream brand their service company already stocks parts for.
Raypak · Crosswind V
Raypak Crosswind V 8550 Heat/Chill Pool Heat Pump
Model TWPH-8550EHC08
- Heating capacity
- 137,000 BTU/hr
- Efficiency (COP)
- COP 5.8
- Heat exchanger
- Titanium
- Warranty
- 7-Year Parts / 2-Year Labor10-Year Heat Exchanger
- Wi-Fi / automation
- Wi-Fi Built In
A Gulf Coast pool that gets used most of the year, where the owner wants heat in winter, the option to chill in August, and a warranty of seven years parts, two years labor and ten years on the titanium tube.
HE125-RA questions
What is the difference between the HE125-RA and the HE125-TA?
The suffix. RA is heat only; TA is reverse cycle and can chill the pool as well as heat it. There is also a small capacity difference — Pentair rates the HE125-RA at 118,000 BTU/hr and the HE125-TA at 115,000 BTU/hr, because the reversing hardware costs a little heating capacity.
What size pool will it heat?
118,000 BTU/hr suits most ordinary Gulf Coast residential pools. What actually decides it is surface area, whether the pool is screened, how exposed the lot is and the temperature you want to hold, so we size it on site rather than from a gallons chart.
Is it safe on a salt water pool?
Yes. The heat exchanger is titanium, so there is no copper in the water path. Plumb the salt cell downstream of the heat pump — the manual asks for the chlorinator on the return side, with a check valve between the chlorinator and the heat pump to stop backflow.
Does it work with pool automation?
Only through dry contacts. The manual states the heat pump cannot be connected to automation over RS-485, and Pentair publishes no app or Wi-Fi control for the GulfStream line. An AquaLink, AquaLogic or Compool system can enable the remote thermostat and drive the setpoint from the controller.
What does the warranty actually cover?
Pentair publishes 7 years parts and 2 years labor on the GulfStream sell sheet and product pages, with no trip charges during the labor period. There is no separate heat-exchanger term — the titanium exchanger sits under the parts warranty. Pentair's cross-brand warranty table lists shorter GulfStream terms, so confirm the current terms in writing before you buy.
Do you install GulfStream heat pumps in Sarasota?
Yes. We install and service GulfStream heat pumps throughout Sarasota, Manatee, Charlotte & Pinellas County, Florida. The comparison content here is written for pool owners anywhere; the installation offer is local.
Is the HE125-RA right for your pool?
We install and service pool heating in Sarasota, Manatee, Charlotte & Pinellas County, Florida. If you are outside that area, the comparison above is still yours to use — ask your local contractor the same questions.
Licensed & insured · Florida Certified Pool/Spa Contractor #CPC1460367 · Mon-Sat, 8am-6pm
Last verified September 17, 2026
Specifications and warranty terms are taken from the manufacturer documents below. Manufacturers revise these without notice, so confirm the current terms before you buy. If you spot something out of date, email us and we will fix it.
Sources
- Pentair / GulfStream — HE125-RA SKU page
- Pentair — GulfStream Heat Pumps product page (model table: BTU, COP, heat-only vs heat/cool)
- GulfStream Heat Pumps — HE Series spec sheet (capacity, COP, amps, breaker, flow, dimensions)
- GulfStream Heat Pumps — sell sheet (7 year parts / 2 year labor, no trip charges)
- GulfStream Heat Pumps — Installation and User Guide (clearances, flow, plumbing order, defrost, automation, water chemistry)
- GulfStream Heat Pumps — Installation Manual (G&F Manufacturing, North Fort Myers FL; dry-contact wiring; enclosed-space warning)
- Pentair — pool product warranty information (cross-brand warranty table listing GulfStream)
Ratings on this site are the editorial opinion of Affordable Solar & Pool Heating, LLC, trading as Modern Pool Heating. How we rate heaters. Corrections: modernpoolheating@icloud.com.
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