'Air-cooled service' is a higher spec oil than 'Water cooled', generally. I cannot tell you exactly what the differences are, but it is sufficient for my purposes that the classification exists. I use only 'Air-cooled service' oil in my lawn mowers. Mr. Roadbike probably uses air-cooled service oil in his Harley. My mower didn't cost $20,000, but I'll spend $5 a year more for the top spec oil for it. Well, I see I've been working on the assumption that you would automatically know why there is a higher spec for air-cooled engines, which is really your question. My bad. Engine heat in air-cooled applications is not regulated well at all compared to water-cooled engines. Heat can spike quickly and there can be hot-spots in the cylinder. A heavier-duty oil is designed for these applications to avoid premature engine failure. Will the average mower do fine on automobile oil? Most likely it will. Is it worth it to spend a few bucks more a year for the very best? Whay not? Makes me feel a lot better. There are two oils that in my view are the very best; Opti-4 10W30 or SAE30 and Royal Purple 'Max-Cycle' 10W30. I have been using the RP 'Max-Cycle' in one mower for two years and I have a 20-year history with Opti-4 30W, which I currently use in my #2 mower. The mower I started using it in in 1990 is still in service at my brother's house and it has had no internal engine repairs, not even a lower seal. That engine is a B&S 3.5 HP, non-commercial.

Your ground water is not quite cold enough for passive cooling. It should not rise above 46ðF ~ 47ðF. You will also have to remove the humidity from the fan coils and have enough water flow from your well for both cooling and domestic water usage. How do you plan to responsibly dispose of the water used for cooling? That could be up to about 600gph. You would not likely return the water to the same well as the temperature will may rise above the level of viability. SR

Well in fact, we do have an "orangerie", which is generally another name for a conservatory, as I learned from the British firm that built ours. However, it is open on one side to our indoor pool. The indoor pool air is kept dry through the use of an enormous piece of eqp called a Dectron. It is the reason no one ever feels any humidity when they come into our house, despite the indoor pool. But, it makes it very hard to grow plants in orangerie/conservatory/greenhouse. We have a disco ball in there and hula hoops instead, LOL. It's a great place for the kids to play loud music that we can't hear!

Rough Linen Forever! No Bamboo for us since it's rayon and a hot chemical mess. The Federal Trade Commission, the nation’s consumer protection agency, wants you to know that the soft “bamboo” fabrics on the market today are rayon. They are made using toxic chemicals in a process that releases pollutants into the air. Extracting bamboo fibers is expensive and time-consuming, and textiles made just from bamboo fiber don’t feel silky smooth. There’s also no evidence that rayon made from bamboo retains the antimicrobial properties of the bamboo plant, as some sellers and manufacturers claim. Even when bamboo is the “plant source” used to create rayon, no traits of the original plant are left in the finished product. FTC on Bamboo Fabrics