I did a system with an Instant Hot (IH) and Reverse Osmosis (RO) into a single faucet. The RO also feeds the freezer for the ice maker. The water is not chilled, but at room temperature. It's only a minor inconvenience, because in order to have cold water you have to either use ice or store a pitcher in the fridge. I had originally considered a water chiller too, but after doing a little research, I found that not many recommend chilled and hot into the same faucet. I think one of the few systems available was from Everpure or something like that. But it was expensive. My system is set up to flow like this: Cold Pipe->RO->Faucet Cold Line->IH->Faucet Hot Line The faucet is vented and has a third line out so it feeds the IH, instead of the RO feeding the IH. After living with my system for almost a year now, I don't have any real complaints. I've only run out of IH and RO water once. That was the first time I entertained during the holidays. I got cute and made tea with the IH while also making coffee with the RO. This was also after serving drinking water from the RO throughout the party. RO takes a few hours to replenish and the IH shouldn't be run on empty. So I had to shut off the IH. Since then, whenever I entertain, I just use a kettle to boil water for tea. Then the IH to top-off or for other cooking needs. I got my IH and RO from Costco and the faucet is a Tomlinson that it designed for RO and IH. Quick & Hot from Costco: http://www.costco.com/Browse/Productgroup.aspx?Prodid=11226343 RO from Costco: http://www.costco.com/Browse/Product.aspx?Prodid=10034720 Tomlinson Faucet: http://www.uswatersystems.com/shop/products/Tomlinson-Hot%7B47%7DCold-Contemporary-Reverse-Osmosis-Faucet.html

Hydrotap is not available in the US and Australian companies won't ship to us here. Believe me I THOROUGHLY researched that angle even debated having it shipped to family in Australia and them bringing it but there would have been no warranty on it at all. We ended up with a RO sytem with an Evercold water chiller and an insta-hot hooked up to the same faucet. We purchased the system at cleanwaterstore.com and I think it came in around $1000 with the chiller, heater, ro system and the dual faucet. We LOVE ours

I'm not certain I know enough about the type of system you are considering. However, we have an RO system in our home and the components are located in the basement quite a distance from the kitchen. It works very satisfactorily. When the system was initially installed, the installer placed everything in the cabinet below our kitchen sink but it took alot of space so when we changed the sink, we had it moved onto a shelf we built in the equipment room of the basement. I only remember that it was necessary that a bit more pressure be added to the bladder to compensate for the altitude difference. Hope this helps.

I think eam44 means to filter the water for your ice makes also, giving you filtered ice in filtered water. I think it's a great idea... prob because that's what we did : ) Frankly, we have a basic 3-filter water system under our sink, with water dispenser above. I fill a glass pitcher and keep it in the fridge, changing the pitcher every couple days to wash. Be aware there are several kinds of water filter systems if you should go that route. Reverse Osmosis is one (RO). We opted out of that as we found the water to be too flat for coffee and tea, but that's our preference only and I understand other's do like it. To best answer your own question, I'd ask how important is immediate hot and cold filtered water, countertop accessible, to you and yours? If it's high on the list, then you may not want a simpler solution of 'just filtered' and refrigerated, as we chose.