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Aqua Hot 675D vs AHE-100 series

August 30, 2022, 02:08:19 pm

Running through questions in my mind...
Is the 675D a direct replacement for the older 100 series AH units?
If so, are they the same quality/output/reliability etc??
I have heard from service shops the 675 is a replacement but am Leary as it looks larger and may not be compatible/same quality etc etc
Any thoughts or knowledge on this??
Peter

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Re: Aqua Hot 675D vs AHE-100 series

Reply #1 – August 30, 2022, 02:39:28 pm

Get with Rudy in the commercial section,he will have the answer.

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Re: Aqua Hot 675D vs AHE-100 series

Reply #2 – August 30, 2022, 05:16:44 pm

The AHE 100 is an older version of the full size heater that replaced the 431/12.  It has a stainless steel case and is a fine heater to maintaine till there is a castistrophic failure.

The AHE 675 is the current version of the Newell heater that  was built for Newell for years.  It has a 120 volt electric heating element as does the AHE 100.  The 675 has a second 240 volt element.  When both are on, it pulls nearly 37 amps ane requires two 120 volt supplies, leg 1 and leg 2.  The 240 volt element only works on a 50 amp power post or on the gen.

The AHE 600 is the replacement for the AHE 100.  It has two 120 volt elements.  So a direct replacement does not use the second element or one needs to pull a second 120 volt leg to the heater.

I will maintain my 431/12 for as long as I can.  If replacement is the only option, it will be a 600 and I will only energize one element.

Hope this helps.

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Re: Aqua Hot 675D vs AHE-100 series

Reply #3 – August 30, 2022, 06:05:12 pm

Rudy what do you consider to be a catastrophic failure on an AHE?  Just wondering which component would warrant scrapping the unit.  Are you mainly thinking of freeze damage?

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Re: Aqua Hot 675D vs AHE-100 series

Reply #4 – August 30, 2022, 06:28:00 pm

For me, a failure of the copper freshwater loop or a failure of the coolant tank would be castastrophic.  One of our members has rebuilt his freshwater loop and could have repaired a failed tank but my skills are no where close to that level.

I forgot to mention, a 431/12 or a 100 can be rebuilt by Aqua Hot for less than a new 600.  Plus, a rebuilt one would be plug and play.  A new 600 would need modest plumbing rerouting of pex pipes and fuel lines.  But small challange there.

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Re: Aqua Hot 675D vs AHE-100 series

Reply #5 – August 30, 2022, 07:27:32 pm

Thanks Rudy
Mine actually is a 431 unit which I presume is the same as the series 100 (??)
As I have spoken on previous posts, I just had the coils replaced as well as previous service involving new wire harnesses thermostats tempering valves etc. In total I have spent about 12 or 13 thousand cdn so my unit  I WOULD THINK... is just about new

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Re: Aqua Hot 675D vs AHE-100 series

Reply #6 – August 30, 2022, 08:51:07 pm

Peter,  your 431 has all metal pumps.  Way better than the plastic pumps in 100 or new heaters.  The new heater plastic pumps retail from AH for less than $200.  AH wants over $1000 for the metal pumps.  If you ever need one, call me as I have another less expensive source.

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