Call Franke and ask. It does seem strange that Franke doesn't have little dispenser taps for filtered tap water. I think they used to sell a water filter (or they still do), so they must have taps for this. I agree that a tap labeled as "hot water only" can pass lower temperature water too. My guess is that the marketing people are out of control. I'm eager to know what the differences are between all the Franke models that look the same. 3100 4100 1030 and 1100 Here are some that have two handles (you get either hot or cold, from the same spout). LB22 LB32 LB42 -- Are you aware of the advantages of IHW?

I do not know how much energy they use, but I can't imagine that it is much. Basically, it is an insulated little tank, 1/2 to 3/4 gallon size, that fits under your sink. It's like a mini hot water heater, but keeps the water much hotter. It's so small and well insulated that I doubt that it uses much energy. Certainly I save water and energy not waiting for water to otherwise get hot or come to a boil. I had one by Kitchenaid; it was effective but the faucet was not too attractive. I loved it for the previously mentioned reasons: hot chocolate or tea or ramen noodles whenever desired, cuts down on cooking time for pasta or steamed vegetables, great to soak a pan, great to wash just a few dishes (diluted with cold) and not wait for the faucet to "warm up", and my husband warms up his coffee mug with it. I am not a tea gourmet; I just put a bag in my mug of hot water. If you are a serious tea gourmet you'd have to ask someone else who is. I definitely plan to put one in my remodel. It will be either Everpure's Everhot product (called Solaria) or the Waterstone product. I plan to have filtered water (not chilled) in one side and hot on the other. You might like the chiller as well. I am limited to either of these because they will accept a reverse osmosis filter with an air gap. There are other brands as well, if you don't have RO. You will need a receptacle under your sink for power. Mine is on the same one as the disposal. Again, I love having the instant hot.

We are getting the Vertex bottleless water dispenser thanks to learning about it on GW. It is a filter and has both hot and cold water at the touch of a button. You hook it up to a water supply to not need bottles, so it solves the dispensing, filtering and hot water needs all in one (we did not "need" the hot water feature, but will prob find it to be handy). The only downside is it will take some counter space, but we plan on making it fit our plan because we could not find a fridge freezer set with water in the door in our price range. We have an interior icemaker and wanted to encourage filtered water drinking in our house over store bought pre-made drinks. I am guessing we will make more (unsweetened) iced teas with the simplified hot water feature.... Here is a link that might be useful: Vertex

I've got the same set up. I've got the Shaw's farm sink with the prep sink in the island. (I just bought the house.) The previous owner installed the Whitehaus Vintage III with two different spouts/spigots. While the bases of the faucets are exactly the same size, the spouts are different shapes. You might try that approach. There are pictures below. I am having to replace the Whitehaus cartridges because of a slow drip on both faucets. They are 10 years old. At least they are available. I spent hours trying to figure out what brand and design that had been installed. If it had been me, I would have selected a different arrangement. I prefer the single sprayer with a soap dispenser arrangement. The two separate hot and cold controls are extra motions. With the cross handles, I can never remember which way to turn them to turn them off. The lever handles might be better. The Shaw's sink doesn't drain well. It requires the use of the sprayer arm every time I do something. It's very deep and hard on your back. It's pretty, but I would rather have my old Kohler Strive single bowl with a grid. I do like the fact that the drain is in the corner. The ceramic finish seems to be holding up to time and use. At this point in life, I don't think anyone builds a good faucet. I long for the days when you could just stick a new washer in the faucet. I might suggest saving my money and buying something cheaper than the Rhol, Perrin and Rowe. Kohler, Moen and Delta actually have good warranties and stand behind them. Everyone else seems to be a reseller. Pretty, but flawed. This is the main sink faucet This is the prep sink The pictures are different finishes. As I said, maybe different spouts/spigots. Good luck with your decision.