Although there are plenty of active ways to cool your home, sometimes a passive system makes the most sense. If you think about it, you know that the ground in the summer is cooler than the air. And the deeper you go, the cooler it gets. So wouldn’t it be great if you could harness that coolness in some way and use it to cool the air in your home?
How Passive Ground Source-Based Cooling Works
Well, the truth is that you can. That’s exactly what ground source-based cooling systems do. While similar to geothermal heat pumps in some basic ways, ground-source based cooling systems use much less energy to achieve their results. Instead of using coolant and a compressor to transfer heat from your home to the ground, passive ground-source based systems simply carry cold water from the ground to your home where it can then cool the air.
Traditional systems are more complicated in many ways. Air conditioners use coolant and electricity and even geothermal heat pumps use a condenser to transfer air into and out of your home. With a passive ground source cooling system, the amount of energy put into the cooling of your home is reduced to practically nothing – there are few systems that offer these results without costing you a lot in monthly bills.
Of course, if you want to put a system like this in place in your home, you need access to a naturally cooled supply of water. Unless you live near a large pond, lake or other ground level water source, this involves digging down to access the groundwater below your home. Depending on how far down you have to go to reach an acceptable water supply, installing this type of system can cost you quite a bit.
But if you do have easy access to naturally cold water, a ground source-based passive cooling system is an excellent option. And even if you have to spend a bit more on installation by drilling or digging, you’ll more than make up for that cost through what you’ll save in monthly energy bills. Air conditioners are great but they suck power, and if you can find a way to cool your home without one, you’ll be much better off in the long run.