My suggestion is to run a polluted/clean water loop system. Assuming you've got a decent power generator like a natural gas geyser up and running, you should have the power to run an aquatuner full time and dump the clean water through it.
Just a single pump, a metric fuckton of liquid pipes made from regular sedimentary rock, and an aquatuner immersed in your polluted water reservoir dumping the heat from your cooling line before it feeds back into the clean water reservoir will probably solve all your heat problems in a few dozen cycles. You'll likely only need insulated piping for the bits that run through the hot polluted water, and with enough length, radiant piping's not really needed, though it might help if you add it to extremely critical zones like your farm areas.
Of course, preventing it's also a good idea, which is why some thermo regulators in your gas supply lines or radiant pipes through a wheezewort room are a useful design strategy.
One of my own preferences is to avoid a lot of heat by making sure my natural gas is cold before it's supplied to my generators. My generator system takes the 150°C vent gas and chills it until it's -21°C before sending it to the generator room. The generators output their gas and fluids based on the generator temperature, so it's helpful to keep these cool to cut down on future base cooling. A bit of preparation saves headaches in the future.