Can Fish Get into My Closed-Loop Geothermal System? - Ask the Expert Episode 209

"Hey Dan, I have a closed-loop geothermal pond installation. How do you keep fish out of the geothermal heat pump? Also, what is the difference between a single-stage geothermal and two-stage geothermal system?"

That is my favorite question of all time. The idea of fish getting into a closed-loop geothermal system amuses me greatly. I don't know why.

It's a closed-loop geothermal system, so it's a closed set of tubes. You sink those in the pond and there's no opening for the fish to go in, because the loops are going to go all the way up to your house and into the flow center. There's no place for the fish to get into. You don't have to worry about that.

Now, the difference between a single-stage and a two-stage geothermal system is simple. Think of it like speeds. A single-stage will just go at one speed. If you've got a two-stage, you've got two speeds. It can go at the low speed or the high speed depending on the need.

For instance, in the spring when you may need some heating and some cooling, you can have it going at a lower speed and it's more energy efficient that way. But in the cold winter or the hot summer, you can have it go into both stages. Two stages are just a little more efficient. Both work really great. You don't typically choose which stage you want the geothermal system to run in. The need for the second stage kicks in by itself depending on the demand from your thermostat.

Have more questions? Just ask them in the comments below or on Facebook or on Twitter.

2 comments (view/add)
  • Jimmy strong
    Jimmy strong
    Posted on 4/28/2020

    How do ya wire the inside thermostat to the outside Goodman package unit

  • Kyle
    Kyle from Ingrams
    Posted on 4/29/2020

    We would recommend you follow the the thermostat installation manual and the package unit installation manual. If you run into trouble, you can call us at 270-575-9595 x300 for tech support.


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