The fact is laws of physics cannot be changed, and when you blow hot air into water it will cool it down no matter what brand of tub it is. Now Bain Ultra was the original air tub, their service is top notch, their parts and materials are top notch, and their design has only the bather in mind. Kohler is not a bad alternative, but all things being equal Bain Ultra all the way. Hope this helps.

Very pretty! I like your palette of pales/whites with the dark wood contrasts. Your arches are a distinctive feature, especially in your vanity area after you have your artwork/mirror in!

Not sure how/if I can reply directly. I just happened to look at this links again. For some reason, I don't get follow up.notifications to post comments. I think I am supposed to. Anyway...we had to go with the BASA, because it is a very small bathroom and we needed to fit in a shower/bathtub combo. you can find pictures of the bath in a previous post. There are lots of Bain ultra tubs that are prettier, can be built in, etc....but we were limited by the size and configuration of our bathroom. I am very pleased with it. have had it for almost five months now, and use it almost nightly. From research I did, it is quieter than most air jets and the guarantee sealed the deal for me. It is very easy to clean and we can use bath salts and bubble baths in it. I understand that you cannot do that in whirlpools. Hope you see this post. I will try to remember to check back. Here is a link that might be useful: Tiny Bathroom renovation

My spa does not have a blower and does not have coping valves either. There are actually three ways to plumb a vent pipe for a spa and it depends on how far the equipment pad is from the pool and what you are looking for. 1) Use coping vent valves to have air adjustment at the spa. Note that changing the amount of air does not change the strength of the jet only the way feels (pulsating vs steady). The same amount of water flows out of the jet regardless of the air. 2) Use a single vent pipe from the spa to the equipment pad. Sometimes a blower is required due to the distance. There really isn't air control with this because if the distance is long, then without the blower, there are usually no bubbles at all. 3) Have a vent pipe close to the spa usually outside of the deck. This does not require a blower and there is not air control. Next, two pumps does not mean he is planning to use both for the spa jets unless he has specifically told you so. Typically in a dual pump installation, one pump is used for pool/spa circulation/filtering/heating and the other pump is for the jets only so you need to make sure on what he is planning. Next, having two pumps does not mean you can't heat the spa. They normally plumb in a separate line for circulation/heating which is why I brought up the point above. Normally, I would put the Intelliflo as a circulation only pump that can be switched between the spa and pool. The other pump would be dedicated to the spa jets only. This save the most in energy costs when it comes to filtering the pool. There is no point in having the Intelliflo if it is dedicated to the spa. However, you could also plumb the Intelliflo so it runs some of the jets too. But generally, it is not a good idea to have high flow rates through your filter and/or heater. So if you really want that many jets, then I would go with three pumps. Use the Intelliflo for just circulation/heating/filtering and nothing else. Then get two high HP pumps to run the jets on separate loops without any other equipment so the jets can be powerful and efficient too.