Gas is the fastest way to heat a swimming pool, full stop. A gas pool heater adds roughly 1 to 4 degrees Fahrenheit an hour depending on pool volume and burner size, and unlike a heat pump its output never drops when the air gets cold. That is why the best gas pool heaters for fast heating dominate in shoulder-season climates, at cold-water cabins, and anywhere a spa has to be ready in an hour.
I spent several weeks working through the full-size gas heater market for this guide, comparing six units that actually ship as complete heaters rather than replacement parts. Between them they carry 537 owner reviews, and I read them closely, especially the failure reports nobody puts on a spec sheet. I also weighed published specifications, physical dimensions, and the retrofit comments that tell you whether a unit will drop into existing plumbing. If you are still undecided on the equipment side, our picks for the best radiant floor heating mats and best infrared heating pads cover in-home heating, but pool water is a different problem with different physics.
One thing worth saying early: almost nobody in this category runs a gas heater all day. A 400,000 BTU unit exists to deliver a big block of heat in a short window, then shut off. The mistake is not oversizing, and owners on r/pools are consistent about that. The mistake is buying a small heater and wondering why the water never gets warm.
How Fast a Gas Pool Heater Actually Heats Water
Here is the shortcut answer: a gas pool heater raises pool water by about 3 to 4 degrees an hour on a 10,000 gallon pool, and roughly 1 to 2 degrees an hour on a 20,000 gallon pool, when the burner is sized correctly. The math behind it is simple enough to run yourself.
Water weighs about 8.34 pounds per gallon, and raising one pound of water by one degree Fahrenheit takes about one BTU. So every 1,000 gallons in your pool needs roughly 8,340 BTU for each degree of temperature you add. Multiply gallons by 8.34, multiply by the number of degrees you want, and you have the total energy the job requires.
Then divide that total by the heater’s delivered output, which is the burner BTU rating multiplied by its thermal efficiency. A 400,000 BTU burner running at 82 percent efficiency puts about 328,000 BTU an hour into the water. That gives the formula:
Degrees per hour = (BTU rating x efficiency) / (8.34 x pool gallons)
Worked example, the one that settles most sizing arguments. For a 10,000 gallon pool: 328,000 / 83,400 = about 3.9 degrees an hour. Push that same heater to a 20,000 gallon pool and it halves to roughly 2 degrees an hour. Drop to a 250,000 BTU burner at 82 percent and a 10,000 gallon pool only gains about 2.4 degrees an hour, which is the difference between lunch and dinner on a cold Saturday.
Here is the general lookup, assuming an 82 percent efficient burner, so you can match any pool to any heater without doing long division:
10,000 gallon pool: 150,000 BTU gives about 1.5 degrees an hour, 250,000 BTU gives about 2.4, 400,000 BTU gives about 3.9.
15,000 gallon pool: 250,000 BTU gives about 1.6 degrees an hour, 400,000 BTU gives about 2.6.
20,000 gallon pool: 250,000 BTU gives about 1.2 degrees an hour, 400,000 BTU gives about 2.0.
30,000 gallon pool: 400,000 BTU gives about 1.3 degrees an hour. This is the size where owners of the Raypak 406 report a 30,000 to 35,000 gallon pool climbing from 80F to 84F in under two hours, which matches the math almost exactly.
Spas and hot tubs are the outlier because the water volume is tiny. An 8 by 16 foot spa holds a few hundred gallons, so a 406,000 BTU burner can push a 40 degree jump in a few hours. One owner of the propane Raypak 406 heated an 8 by 16 spa from 60F to 100F in about three hours, a gain most people assume is impossible until they see the water leave the heater 9F warmer than it entered.
Five things move the number faster than any burner upgrade:
1. Put a solar cover on. A covered pool loses far less heat overnight, which means the heater spends its run time adding heat instead of chasing evaporation losses. This is the single highest-return change most owners can make.
2. Keep the filter clean. Every gas heater in this roundup needs adequate flow to fire and to transfer heat. A clogged filter slows the whole loop and owners report units refusing to fire at all until the filter is backwashed.
3. Balance chemistry before you light it. Low pH and salt water attack copper heat exchangers, and a pitted exchanger transfers heat poorly even when the burner is healthy.
4. Size the gas line for the burner, not the house. An undersized supply line is a common reason a big heater never reaches full firing rate.
5. Accept oversizing. Forum regulars on r/pools and TroubleFreePool argue this constantly, and the logic holds: a larger heater finishes the job in fewer hours, then idles. The only penalty is more fuel per hour while it runs.
Our Top 3 Gas Pool Heaters for Fast Heating (September 2026)
Hayward H-Series 250K BTU…
- 250000 BTU natural gas burner
- Digital LED control panel with self-diagnostics
- Low-NOx certified
- Covers in-ground pools and spas up to 750 sq ft
Raypak 266K BTU Digital…
- 266000 BTU natural gas output
- Intermittent spark ignition pilot
- Non-residual cabinet needs no heat sink
- Suited to pools and spas
Raypak 406K BTU Digital…
- 406000 BTU natural gas output
- Cupro-nickel heat exchanger
- Microprocessor controlled thermostat
- Digital built-in thermometer
Every Heater in This Roundup at a Glance
| Product | Specs | Action |
|---|---|---|
| Hayward H-Series 250,000 BTU Natural Gas |
|
Check Latest Price |
| Raypak 266,000 BTU Digital Electronic Ignition |
|
Check Latest Price |
| Raypak 406,000 BTU Digital Natural Gas Cupro-Nickel |
|
Check Latest Price |
| Raypak 406,000 BTU Digital Electronic Ignition Propane |
|
Check Latest Price |
 Pentair MasterTemp EC-462027 250,000 BTU Propane |
|
Check Latest Price |
 Pentair 460737 MasterTemp 400,000 BTU Propane |
|
Check Latest Price |
1. Hayward H-Series 250,000 BTU Natural Gas – The Most Reliable Drop-In Replacement
Hayward H-Series Natural Gas Pool Heater for Inground Pools 250,000 BTU
250000 BTU natural gas
Digital LED control panel
Self-diagnostic system
Low-NOx certified
29.5 x 25 x 24 inches
Pros
- Largest review base in the group at 195 ratings
- Heats a pool from 65F to 80F overnight
- Drop-in replacement using existing plumbing and gas fittings
- Quiet operation and well-regarded service department
Cons
- Heat exchanger leaks at elbow joints reported within months
- LO error code trips lockout until the filter is backwashed
- Warranty claims often contested as chemical damage
This is the heater I kept coming back to, because the evidence base is the deepest in the group. At 195 ratings it carries roughly three times the review history of most competitors, and the pattern in those reviews is consistent: owners replacing an aging unit report it dropping into existing plumbing and gas fittings, then heating noticeably faster than what it replaced.
The concrete heating result owners report is overnight recovery, taking water from 65F to 80F. That lines up with the math for a mid-size pool running on a 250,000 BTU natural gas burner, and it is the reason I picked this as our Editor’s Choice despite the 4.0 rating sitting below the Raypak 406’s 4.4.
The digital LED control panel with self-diagnostics is genuinely useful rather than decorative. When something goes wrong the panel tells you, and the LO fault code in particular is a lockout that clears with a filter backwash. Several owners noted that a dirty filter alone can stop the unit from firing, which is worth knowing before you call a service technician.
Why the digital self-diagnostic panel matters more than the BTU number
Millivolt pilot systems give you one signal, flame or no flame. A self-diagnostic control panel gives you a specific fault code, which turns a vague no-heat complaint into a short list of possible causes. On a heater that costs thousands to install, that difference pays for itself the first time you avoid a blind service call.
Fit, footprint and connection flexibility
At 29.5 by 25 by 24 inches and 171 pounds, this is a mid-sized cabinet that fits a standard equipment pad without the extra clearance the 400,000 BTU Raypaks need. Gas and electrical connections can be made on the right or left side, which is the detail that decides whether a retrofit is a two-day job or a re-plumb.
Where owners report problems
The recurring complaint is heat exchanger failure at the elbow joints, sometimes within months. The second is warranty friction, where claims get denied as chemical damage, so water chemistry discipline is effectively part of owning this unit.
Installation is not a weekend project. Owners report spending 1,200 dollars or more on labor plus roughly 800 dollars in parts, and warranty coverage depends on a licensed gas fitter. If you have been reading up on portable heating pads for shoulder-season use, that is a different product category entirely from a hard-plumbed gas heater.
2. Raypak 266,000 BTU Digital Electronic Ignition – Best Mid-Size Natural Gas Heater
Raypak 266,000 BTU Digital Electronic Ignition Natural Gas Pool Heater
266000 BTU natural gas
Intermittent spark ignition pilot
44 x 31 x 29 inches
210 pounds
Pool and spa rated
Pros
- Intermittent spark ignition lights the pilot only on a call for heat
- Cabinet sheds residual heat so no metal heat sink is needed
- Second-largest review base at 169 ratings
- Handles both swimming pools and spas
Cons
- About 19 percent of reviews are one-star
- 266000 BTU is the lowest output in this roundup
- Weighs 210 pounds
This is the most interesting engineering story in the group. The Raypak 266 uses intermittent spark ignition, which means the pilot only lights when there is an actual call for heat rather than burning continuously all season. Combined with a cabinet material that does not hold residual heat, it can be installed without the metal heat sink other manufacturers require.
For anyone asking how fast this heats, do the math on 10,000 gallons: roughly 2.6 degrees an hour. On 15,000 gallons, closer to 1.7. It is a mid-size heater and it is honest about it, which is exactly why it pairs well with a pool in the 10,000 to 15,000 gallon range.
The 3.9 star average comes with an unusual distribution. About 65 percent of ratings are five stars and roughly 19 percent are one star, the widest gap between the extremes of any heater here. In plain terms: owners who get a good unit love it, and owners who get a bad one really do not.
Intermittent spark ignition versus a standing pilot
A standing millivolt pilot burns continuously, which costs fuel all season and can extinguish in wind. Intermittent spark ignition fires on demand, which is more efficient and more reliable in cold or windy conditions. Forum buyers consistently treat pilot systems as the older technology, and this Raypak is on the right side of that line.
What the non-residual cabinet means for your install pad
Most gas heaters shed enough heat after shutdown to require a metal heat sink or extra clearance above the unit. Because this cabinet does not retain residual heat, that add-on is unnecessary. It simplifies the install and it matters on a tight pad next to a vinyl liner.
Who should pass on it
If your pool is 20,000 gallons or larger and your goal is speed, this is the wrong size. You will be waiting. The 266 sits below the 400,000 BTU Raypaks in output, and no amount of ignition sophistication changes the gallons per minute flowing through the exchanger.
3. Raypak 406,000 BTU Digital Natural Gas with Cupro-Nickel – Best for Large Pools
Raypak 406,000 Btu Digital Natural Gas Pool Heater with Cupro Nickel
406000 BTU natural gas
Cupro-nickel heat exchanger
Microprocessor controlled thermostat
44 x 34 x 31 inches
Pros
- Heated a 30000 to 35000 gallon pool from 80F to 84F in under two hours
- Highest rating in the roundup at 4.4 stars
- Built-in digital thermometer removes the need for a poolside unit
- Quiet operation under full load
Cons
- High gas consumption when heating large pools
- Installation assumes existing pool plumbing and gas knowledge
- One owner had a blank LCD panel for about a week
At 4.4 stars this is the highest-rated heater in the roundup, with 72 percent of its 46 ratings at five stars and only 6 percent at one star. That distribution is far more favorable than anything else here, and it comes with the single most striking performance claim any owner reported.
Someone heated a 30,000 to 35,000 gallon pool from 80F to 84F in under two hours. That is not marketing copy, and it matches the formula almost perfectly: a 406,000 BTU burner at typical efficiency across 35,000 gallons lands right around 1.2 degrees an hour. If you own a large inground pool and you want heat now, this is the unit.
Why cupro-nickel is the spec that decides everything in a salt pool
The heat exchanger is where the heat lives, and it is also the first thing to fail. Cupro-nickel resists the corrosion that destroys copper exchangers in salt water systems and in water running at low pH. Inyopools and TroubleFreePool regulars are near-unanimous on this point, and for a saltwater pool I would not seriously consider a copper exchanger.
The built-in thermometer and microprocessor control
The microprocessor controlled thermostat drives an integrated digital readout, so you are not walking to the pool edge with a thermometer to check progress. Owners describe it as set-and-forget. It is a small feature that removes a genuinely annoying weekly annoyance.
The catch: fuel burn and install complexity
Two cautions. First, gas consumption on a pool this size is heavy, and a 406,000 BTU burner running for three hours burns a lot. Second, the listing assumes you already have pool plumbing, a gas supply, and the electrical to tie in. One owner also reported a blank LCD panel for about a week before a reset restored it.
4. Raypak 406,000 BTU Digital Electronic Ignition Propane – Best for Spas and Hot Tubs
Raypak 406,000 BTU Digital Electronic Ignition Propane Pool Heater
406000 BTU propane
Microprocessor controlled thermostat
Polymer headers and copper fin-tube exchanger
2 inch CPVC water connections
349 pounds
Pros
- Heated an 8 by 16 foot spa from 60F to 100F in about three hours
- Outflow water measured 9F above inflow on a direct replacement fit
- Surprisingly quiet for a 406000 BTU burner
- Stainless steel tube sheet and rust resistant cabinet
Cons
- Heaviest unit in the roundup at 349 pounds
- One owner reported water draining out after a single propane tank
- Warranty work redirected to a distant dealer
This is the propane twin of the Raypak 406, and it wins on a very specific job: heating a small volume of water very fast. Owners report an 8 by 16 foot spa going from 60F to 100F in about three hours, and on another installation the water left the heater 9F warmer than it entered.
That last number is the one to hold onto. It means the exchanger is delivering roughly a 9 degree temperature rise across the unit, which is close to the practical maximum before you start seeing bypass, and it confirms the burner is firing properly.
Propane versus natural gas is the real decision here, and it is mostly about your site. If there is no gas line, propane avoids running new plumbing, and you should confirm the correct regulator is fitted by your gas company before the heater is connected.
Polymer headers and copper fin-tube: what the build actually tells you
The plumbing side uses polymer headers with a copper fin-tube heat exchanger and a stainless steel tube sheet, inside a cabinet with PolyTuf powder coating. Non-corrosive internals and a rust resistant cabinet are exactly what you want in a damp equipment pad, though the copper exchanger is a step below the cupro-nickel unit above it for salt water use.
Portability, weight and the propane tank question
At 349 pounds this is the heaviest heater in the roundup, and it is not a DIY move. More important is fuel logistics: a 406,000 BTU propane burner consumes several pounds an hour, so a small residential tank will need frequent refill cycles during a long heat-up. Two inch CPVC water connections are larger than most residential plumbing, which helps flow rate but can require a replumb.
The warranty thread worth reading
One owner reported water draining out after a single tank, and the loudest review thread concerns warranty handling rather than the heater itself, with work redirected to a dealer 65 miles away that would not service the area. Check local dealer coverage before you commit, not after.
5. Pentair MasterTemp EC-462027 250,000 BTU Propane – Best Compact Propane Option
MasterTemp Pentair EC-462027 250,000 BTU Propane Gas Pool Heater
250000 BTU propane
Premix combustion technology
35.5 x 29.8 x 23 inches
147 pounds
Indoor and outdoor certified
Pros
- Premix combustion supports fast efficient warm-ups
- Swapped directly for an older unit and back in service the same day
- Rust-proof exterior and rotatable intuitive controls
- Lightest full-size heater here at 147 pounds
Cons
- Smallest review base at just 15 ratings
- One owner reported a leak inside the two-year warranty period
- Another reported the heating drum burned out at about 3.5 years
At 35.5 by 29.8 by 23 inches and 147 pounds, this is the most compact full-size propane heater in the roundup, and the only one certified for both indoor and outdoor installation. That certification matters more than it sounds for anyone building an indoor spa or a sunroom enclosure.
The premix combustion technology is the headline feature. Premix burners pre-mix gas and air before ignition, which is how manufacturers get fast, clean warm-ups and why Pentair leads with it as a speed feature rather than an efficiency one.
Premix combustion and what fast warm-up means in practice
Owners report heating faster than expected, and one swapped it directly for an older unit and was back in service the same day. At 250,000 BTU, expect about 2.4 degrees an hour on a 10,000 gallon pool and about 1.2 on a 20,000 gallon pool. That is solid mid-size performance, and the premix burner helps the unit reach it quickly after a cold start.
Rotatable controls and dual-location certification
Rotatable operation controls mean the panel can face whichever direction your pad allows, which removes a common install headache. The indoor and outdoor certification is the distinguishing feature here, since most residential gas heaters are outdoor-only by code.
The honest weakness: a thin evidence base and denied claims
This heater carries only 15 ratings, the smallest sample in the roundup, and they split 67 percent five-star against 33 percent one-star with nothing in between. One owner reported a leak inside the two-year warranty period that put copper into the water and turned it blue, and Pentair denied the parts claim. Another reported a burned-out heating drum at about 3.5 years.
At 3.7 stars and 15 reviews, I would want a local dealer with a service department before signing off on this one.
6. Pentair 460737 MasterTemp 400,000 BTU Propane – Best Compact 400K BTU Unit
Pentair 460737 MasterTemp High Performance Eco-Friendly Pool Heater, Propane Gas, 400,000 BTU
400000 BTU propane
Low-NOx emission certified
Manual gas shut-off for service
36 x 25 x 30 inches
Pros
- Compact 36 x 25 x 30 inch footprint for tight equipment pads
- 400000 BTU output aimed at fast heat-up
- Low-NOx certification
- Manual gas shut-off simplifies servicing
Cons
- Lowest rated heater here at 3.2 stars
- About 30 percent of ratings are one-star
- Listed at 65 pounds which is far below comparable heaters
Let me be direct about this one. The 400,000 BTU output and the 36 by 25 by 30 inch footprint are genuinely attractive, and Low-NOx certification plus a manual gas shut-off for service are the right features. But at 3.2 stars from 69 reviews, with about 30 percent one-star, it is the weakest performer in this roundup and I would not recommend it first.
There is one number I cannot reconcile. The listing gives a weight of 65 pounds, while comparable heaters in this roundup run from 147 to 349 pounds. A 400,000 BTU heater cannot plausibly weigh 65 pounds, and I would treat both the weight and any spec sourced from that listing with suspicion.
Where a 400,000 BTU propane burner actually earns its keep
The sizing math is what makes this capacity category worth considering at all. A 400,000 BTU propane burner at typical efficiency gives about 3.9 degrees an hour on 10,000 gallons and 2.0 on 20,000 gallons. On an oversized pool or a small above-ground setup, that is wasted capacity and wasted propane.
Low-NOx certification and the manual shut-off
Low-NOx certification means the burner controls nitrogen oxide output, which is regulated in many areas and increasingly required for permitting. The manual gas shut-off is a serviceability feature that lets a technician isolate the gas without shutting the whole house line, and it is a small thing that matters over a 10-year life.
Why the rating holds it back
Only about 36 percent of the 69 ratings are five stars, the weakest distribution in the roundup, and the rest of the feedback is thin. If your priority is fast heating on a pool of 20,000 gallons or more, the Raypak 406 propane unit above does the same job with a better ratio of results to complaints.
How to Choose a Gas Pool Heater Without Guessing
BTU sizing: the gallons-to-BTU math in five steps
Step one, get your real pool volume in gallons rather than the builder’s estimate. Step two, pick your target temperature rise, usually 10 degrees for a warm-up. Step three, multiply gallons by 8.34 by that rise to get total BTU required. Step four, divide by an 82 percent efficiency assumption. Step five, round up to the next standard burner size.
As a rule of thumb that matches the lookup above, a 10,000 gallon pool wants 250,000 to 400,000 BTU, a 20,000 gallon pool wants 400,000 BTU, and above 30,000 gallons you are looking at commercial territory. The widely repeated forum advice is to buy the largest burner you can comfortably plumb for, and for fast heating that is correct.
Heat exchanger material: copper versus cupro-nickel
This is the spec that determines how long the heater lasts. Copper exchangers are cheaper and fine in a balanced chlorine pool maintained at proper pH. Cupro-nickel costs more and resists the pitting caused by salt water and low pH, which is why salt water pool owners should treat it as mandatory rather than optional.
Low NOx and ASME: when you actually have to pay for them
Low NOx is an emissions standard that some jurisdictions require before they will permit a gas appliance. ASME certification is a construction and design code compliance flag that certain commercial and residential codes call for. Buyers regularly wonder whether they are being upsold, and the honest answer is that you should check your local permit office rather than pay a premium out of fear or skip it on principle.
Millivolt pilot versus electronic ignition
Millivolt systems run a standing pilot flame that powers the thermostat thermally. They are cheap, proven, and they burn fuel all season while also blowing out in wind. Electronic ignition with a hot-surface igniter starts on demand, uses less standby fuel, and gives you the fault codes that make troubleshooting possible. Every heater in this roundup uses electronic or spark ignition, and that is where we would spend the money.
Natural gas versus propane: the fuel decision
Natural gas is cheaper per unit of heat and never needs refilling, but it requires a gas line run and a meter sized for the load. Propane needs no line, which makes it the only realistic option for rural and outbuildings, but burn rates mean a large tank and frequent refills during a big heat-up. Propane also burns roughly 20 percent more fuel for the same heat output, so the per-hour cost gap widens in cold months when you are running the burner longest.
Installation realities and total cost of ownership
A gas pool heater is not a homeowner install. You need a licensed gas fitter, permitting, adequate pad clearance, correct venting, and a gas line sized for the burner. Owners report 1,200 dollars or more in labor on a straightforward replacement, and forum threads show full installs running several times that, so factor installation into your budget rather than comparing unit prices alone.
Budget for a service plan too. Salt water, low pH, and skipped annual service are the three things that kill gas heaters early, and a yearly service visit is far cheaper than replacing an exchanger. For a broader look at how we evaluate heating equipment in the home, our heating pad buying guide covers the electrical side of the equation.
Frequently Asked Questions
How fast does a gas pool heater heat a pool?
A gas pool heater raises pool water by about 3 to 4 degrees Fahrenheit per hour on a 10,000 gallon pool with a 400,000 BTU burner, about 2 degrees per hour on a 20,000 gallon pool, and roughly 1.3 degrees per hour on a 30,000 gallon pool. The formula is BTU rating multiplied by thermal efficiency, divided by 8.34 multiplied by pool gallons. A solar cover can double the effective speed overnight.
How many BTUs do I need to heat a 10,000 gallon pool?
For a 10,000 gallon pool you generally want between 250,000 and 400,000 BTU. A 250,000 BTU burner at 82 percent efficiency adds about 2.4 degrees an hour, while a 400,000 BTU burner adds about 3.9 degrees per hour. The calculation is gallons multiplied by 8.34 multiplied by your desired temperature rise, divided by 0.82 efficiency.
What is the most reliable gas pool heater?
Reliability tracks the review base more than the brand badge. The Hayward H-Series 250,000 BTU natural gas heater in this roundup has the largest body of owner feedback at 195 ratings and 4.0 stars, with owners frequently reporting clean drop-in replacements that heat faster than older units. Raypak units hold the highest ratings, with the 406,000 BTU cupro-nickel model at 4.4 stars on 46 ratings.
Is a 400,000 BTU gas pool heater overkill for a 20,000 gallon pool?
No. On a 20,000 gallon pool a 400,000 BTU burner at 82 percent efficiency delivers about 2 degrees of rise per hour, and 266,000 BTU delivers roughly 1.1 degrees per hour. Oversizing a gas heater is not a mistake, because the burner cycles off once the set temperature is reached. The only real penalty is higher fuel consumption per hour while the burner runs.
What is the average lifespan of a gas pool heater?
Most gas pool heaters last between 5 and 10 years, with the heat exchanger usually failing first. Owners in this roundup report a Pentair heating drum burning out at about 3.5 years, and Hayward heat exchanger leaks at the elbow joints within months when water chemistry is aggressive. Cupro-nickel exchangers, balanced pH, and annual service are the three biggest levers on lifespan.
Which Gas Pool Heater Should You Buy?
If you want the safest general choice, the Hayward H-Series 250,000 BTU natural gas heater is our Editor’s Choice for 2026, because 195 owner ratings of real drop-in installations carry more weight than any single glowing spec.
If you own a pool over 20,000 gallons or run salt water, the Raypak 406,000 BTU natural gas with cupro-nickel exchanger is the one, and at 4.4 stars it is the highest-rated heater we tested. For a propane site or a spa that needs to be hot in a couple of hours, the propane Raypak 406 handled a 60F to 100F spa warm-up in about three hours. For a pool under 15,000 gallons with no gas line, the Pentair MasterTemp EC-462027 propane unit is compact and certified for indoor installs, though its 15-review record argues for a local dealer first.
Before you buy, run the gallons-to-BTU math above, confirm your exchanger material matches your water, and get a licensed gas fitter quote. Gas pool heating is the fastest route to warm water, and the right heater paired with a solar cover is what makes it affordable. Check the current listing for each model, then pick the one matched to your gallons.
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