Hello everyone. I recently purchased a house with a 25,000 gallon Pool with a Spa incorporated with the spillover feature. The heater that came with the pool was a Laars Jandy LT400N with 399,000BTU output. Its been broken for about 10 years. I was looking to replace it with the Hayward W3H400FDN since it the same BTU output as what was originally installed. I was looking to see if this makes sense. Also what other heaters I should look at? Thanks
Replacement Heater
- Thread starter JDunks
- Start date
- Jul 21, 2013
- 65,414
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Consider the Jandy JXI400N and you may be able to use the RS-485 Smart Connection if you have Rev N or higher on your Aqualink.
Thanks for your reply. I'll look into it. Going to research upgrading my firmware now.
Last edited:
- Jul 21, 2013
- 65,414
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
If you don’t have iAqualink then getting the RS-30 upgrade gets you new firmware with it.
Jandy Aqualink RS - Further Reading
www.troublefreepool.com
Most any heater should work, really. I'm a fan of my Raypak 400k BTU unit. Honestly, the RS-485 connection matters far, far less with a heater than, say, a VS pump. Plus, you can actually buy parts for a Raypak. Jandy won't sell you anything if you're a DIY'r, and they certainly will NOT sell you the heater.
That's actually the same heater the previous owners of my house had and removed. Installed the Raypak a couple of months after we moved in and I've been very pleased with it.
That's actually the same heater the previous owners of my house had and removed. Installed the Raypak a couple of months after we moved in and I've been very pleased with it.
For clarity, the 399,000 is the input rating. The output is about 84% of that.
Thanks the clarity.
Ok. Happy to hear its working for you. I'll probably end up going with that one.