Originally Posted by Lepke
Years ago when water was plentiful, larger land ac units were cooled by water that dumped into drains. Now they are illegal. Others covered the advantages of sea water cooling, but air cooled engines in an enclosed space are unbearable.
Marine anything is generally better built and longer lasting than land units. Diesel
engines greatly outlast gas engines and the fuel doesn't explode. I have a Perkins
that is 46 years old and can be rebuilt indefinitely. My mains are about 65 years old and only rebuilt twice in that time. Try that with a gas engine
Not to mention fuel savings. Cheap equipment
will also effect your resale value.
I think you are confusing geothermal units which are a different animal taking advantage of the fact that well water used for cooling typically comes at around 50deg rather using air which may be at 80-100 degrees. They are still legal
but you can't dump the water into the sanitary sewer, you need to pump it back into the ground via a secondary well.
The durability of older diesels had nothing to do with being marine. The higher compression
ratios forced them to be built more heavily and truckers (the vast majority of purchasers) needed long term durability. Modern engines particularly small diesels used in cruising boats don't shows the same increased lifespan as it's nothing to get 250k miles out of a gas car engine. I had a 30yr old V8 powered boat with the original engines. They ran fine when we sold it and to the best of my knowledge they had never been rebuilt...so I tried it with gas engines. The vast majority of boat engines fail due to abuse and neglect. They very rarely wear out.
I will agree a window unit doesn't boost resale value but a window unit is easily removed when it comes time to sell and when you compare a couple hundred to a couple thousand for a "marine" unit, you are unlikely to get the extra cost back on resale.