Raypak Digital 336A
Good value for in-ground pools outside low NOx areas, provided it comes from an authorized dealer so the warranty holds.
Amazon $3,615$3,615
The Raypak Digital 336A is the better gas pool heater overall, rated 3.5 to 2.8. The Raypak Digital 336A leads on warranty, value and heating input. The Pentair MasterTemp 300 wins on efficiency. The Raypak Digital 336A costs $484.99 less ($3,615 vs $4,099.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Pentair MasterTemp 300
For a typical in-ground pool on Pentair automation that wants faster heat than a 250 without the gas line a 400 needs.
Amazon $4,099.99$4,099.99
Which should you buy?
- Choose the Raypak Digital 336A for warranty (2-year warranty vs 1-year warranty), value ($10.89 per 1,000 BTU/h ($3,615, 332,000 BTU/h) vs $13.67 per 1,000 BTU/h ($4,099.99, 300,000 BTU/h)) and heating input (332,000 BTU/h vs 300,000 BTU/h).
- Choose the Pentair MasterTemp 300 for efficiency (84% thermal efficiency vs 82% thermal efficiency).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 250,000 BTU and up gas pool heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Raypak Digital 336A | Pentair MasterTemp 300 |
|---|---|---|
| Overall rating | 3.5/5 | 2.8/5 |
| Value 35% | 76 $10.89 per 1,000 BTU/h ($3,615, 332,000 BTU/h) | 48 $13.67 per 1,000 BTU/h ($4,099.99, 300,000 BTU/h) |
| Heating input 25% | 55 332,000 BTU/h | 33 300,000 BTU/h |
| Efficiency 20% | 33 82% thermal efficiency | 67 84% thermal efficiency |
| Warranty 20% | 50 2-year warranty | 0 1-year warranty |
Specifications
| Raypak Digital 336A | Pentair MasterTemp 300 | |
|---|---|---|
| Heating | ||
| Gas input | 332,000 BTU/h | 300,000 BTU/h |
| Gas type | Natural gas or propane | Natural gas or propane |
| Thermal efficiency | 82% | 84% |
| Condensing | No | No |
| Low NOx | No | Yes |
| Heat exchanger | Copper | Copper |
| Max water flow | 100 GPM | 120 GPM |
| Installation and controls | ||
| Ignition | Electronic | Electronic |
| Venting | Both | Both |
| Digital controls | Yes | Yes |
| Automation or app | Yes | Yes |
| Weight | - | 136 lb |
| Warranty | 2 years | 1 year |