AquaHot Descale?

[hawgguy]

I have 2 tankless hot water heaters in my sticks & bricks. We have very hard water. Around every 12-18 months I will flush the units with 3 gallons of white vinegar for an hour or so using a sump pump to descale. It occurs to me that, since I live in my bus for 26 weeks a year x 3 years I probably should service the AquaHot hot water heater as well.

Has anyone done this with their AquaHot? Where & how dod you tap in? My home units have service ports with garden hose threads which makes it reatively easy.

[drwaynesmith]

Originally Posted by hawgguy

I have 2 tankless hot water heaters in my sticks & bricks. We have very hard water. Around every 12-18 months I will flush the units with 3 gallons of white vinegar for an hour or so using a sump pump to descale. It occurs to me that, since I live in my bus for 26 weeks a year x 3 years I probably should service the AquaHot hot water heater as well.



Has anyone done this with their AquaHot? Where & how dod you tap in? My home units have service ports with garden hose threads which makes it reatively easy.

I'm not an expert, but I suspect you don't have the same issue with the AquaHot. The tankless heaters run the domestic water in direct contact with the high power heating element/surface, causing film boiling at the surface, resulting in mineral deposits something like that inside a tea kettle. In the AquaHot, only the glycol solution with distilled water is in direct contact with the heating surface, there aren't any minerals to deposit. The domestic hot water is then heated indirectly via the glycol solution, domestic water never touches the directly heated electric/diesel surfaces, so doesn't get hot enough to precipitate it's mineral scale.