Home mining setup with immersion cooling and gear choices

Hey everyone, Been lurking for a while, did some GPU mining before, but I've recently jumped into asic mining. Right now, I’ve got a few S9s running with some custom firmware, pulling about 900 W at home. I’ve got the fan speed set to around 15-20% of the max. My next move is to swap out the fans for a duct-ventilator setup, which should help me handle bigger miners like the S17 or S19 down the line. I see a lot of people using noise suppression boxes for their miners, but since the fans are the main source of noise, I think focusing on airflow and cooling differently is a smarter approach. I’m mainly looking to invest in miners to get a return, but I also want to use some of the excess heat to warm up our house. Electricity costs are pretty stable at just under 0.1 USD per kWh, all taxes included, so the S9s are only just breaking even right now. But hey, they do give off 'free' heat, which is great during the winter and most of the year. Here’s what I’m planning for my investments: 1. Max out my power usage around 10 kW, since my house can handle 18 kW. 2. Keep the noise down to a reasonable level, ideally below 30 dB inside the house, and make sure the garage doesn’t sound like a server room. 3. Try to repurpose some of the heat for hot water, and maybe even a heated pool in the future. I’ve got a solid background in electronics and SMT repairs, but I'd rather have the miners running than fixing them all the time. That said, I’m more than willing to modify them for quieter operation and longer maintenance intervals. Immersion cooling seems like a smart way to cut down on noise. I thought water cooling might be a better solution too.