Bill D'Alessandro@BillDA
I was quoted $10,000 to install two dehumidifiers in my crawlspace.
I saved $7,500 by designing a DIY custom crawl space dehumidification system with Claude 🤑
I am not an HVAC professional.
Here’s how I did it.
Our story begins with the discovery that our new home needed a dehumidifier installed in the crawl space to prevent mold.
The professionals told me it would cost $10k, since I’d need one unit on each end due to the size of the space, plus a second drain line installed.
“Can’t we just use fans to move the humid air from one side toward the dehumidifier?”
They wouldn’t do that.
Enter Claude…
I uploaded a floor plan of my crawl space and air volume dimensions, telling Claude what I was trying to do. It researched the best dehumidifier sized appropriately for my air volume (100 pints apparently). Found me the best price - $1,500.
Now it was time for fans 💨
I had originally envisioned the single dehumidifier at one end of the space, with fans on the opposite end.
Claude taught me that would just draw more moist outdoor air in through the vents on that side, creating a linear flow through the crawl space.
Instead it modeled the air flow and suggested a circular vortex with 4 fans, one on each wall, in a circle. That sucks in minimal outdoor air, keeping cool dry air circulating.
I told it to research appropriate fans. It found four 20” sealed bearing fans on Amazon (impervious to dust), with DC drive motors (more energy efficient than AC apparently). $120 each.
🔌 It told me to buy a smart plug for each fan and a few internet connected humidity sensors. Another $200.
Claude mapped where to install everything in the crawl space.
Here’s how it works - the humidity sensors monitor the crawl space air continuously. If it ever exceeds 60% humidity, the smart plugs switch on all 4 fans, circulating the air in the crawl space past the dehumidifier until the humidity is below 50% 🔃🔃🔃
Total cost ~$2,500 for everything and one Saturday of work for me. I saved $7,500 vs. the original quote because I didn’t need two dehumidifiers, and Claude tells me my version is nearly twice as energy efficient. Plus I learned a ton about my home and had fun.
I didn’t know anything about dehumidifiers, fans, or air flow dynamics before starting.
AI can do so much more than write code - the applications are endless.