Jandy JXiQ 400 with VersaFlo
For a large in-ground pool with a variable speed pump, where the built in bypass and smart diagnostics earn back the price.
Amazon $4,991.71$4,991.71
The Jandy JXiQ 400 with VersaFlo is the better gas pool heater overall, rated 3.6 to 3.5. The Jandy JXiQ 400 with VersaFlo costs $308.29 less ($4,991.71 vs $5,300).
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.
Jandy JXi 400
For a large in-ground pool on Jandy automation where a compact, light cabinet matters more than price.
Amazon $5,300$5,300
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 | Jandy JXiQ 400 with VersaFlo | Jandy JXi 400 |
|---|---|---|
| Overall rating | 3.6/5 | 3.5/5 |
| Value 35% | 59 $12.51 per 1,000 BTU/h ($4,991.71, 399,000 BTU/h) | 51 $13.28 per 1,000 BTU/h ($5,300, 399,000 BTU/h) |
| Heating input 25% | 99 399,000 BTU/h | 99 399,000 BTU/h |
| Efficiency 20% | 67 84% thermal efficiency | 67 84% thermal efficiency |
| Warranty 20% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Jandy JXiQ 400 with VersaFlo | Jandy JXi 400 | |
|---|---|---|
| Heating | ||
| Gas input | 399,000 BTU/h | 399,000 BTU/h |
| Gas type | Natural gas or propane | Natural gas or propane |
| Thermal efficiency | 84% | 84% |
| Condensing | No | No |
| Low NOx | Yes | Yes |
| Heat exchanger | Copper | Copper |
| Max water flow | 100 GPM | 100 GPM |
| Installation and controls | ||
| Ignition | Electronic | Electronic |
| Venting | Both | Both |
| Digital controls | Yes | Yes |
| Automation or app | Yes | Yes |
| Weight | - | 126 lb |