To where are you targeting the delivery of it? If to a dishwasher or washing machine, a simple method is to run a faucet near the machine until the flow is hot ... such as at the kitchen sink. Otherwise, pretty much the only way is via a recirculation pump on a flow loop from the water heater across all the taps. Some plumbing systems are constructed with a dedicated recirculation loop. There are retrofit pumps that are installed at the furthest usage point from the heater, feeding water from the hot line into the cold to create a flow loop ... usually operated on a timer or on-demand a few mins before hot water is needed. One such product is the Metlund D'MAND System. There are others.

You don't need 3 separate faucets. I have two: the main faucet I use for washing (which isn't filtered) and then a small hot/cold faucet that's hooked to the filter and the instant hot. I left the filtered cold dispenser out of my original description because it's integrated with the instant hot system. The filter faucet I have is this one, I think. The only thing I don't like about it is that the hot lever is spring-loaded as a "safety" feature, so you have to hold it down to keep the water flowing. (I put "safety" in sneer quotes because I think it's less safe to force me to keep my hand near the hot water.) I actually have a ice/water dispenser on the fridge too. It dispenses chilled water, but it comes out quite a bit more slowly than the non-chilled water from the hold/cold dispenser by the sink. I tend to use the one on the fridge for a quick glass of ice water and the one by the sink for filling pitchers and other big stuff. I didn't try hooking the main faucet up to a filter because I think it would take a big filter to maintain the water pressure and flow rate you'd want from a faucet used for washing dishes, rinsing vegetables, etc. If I have time I'll try to post some photos of what my set-up looks like from above and below the sink. I may have to do a bit of cleaning first, though. :-) Depending on how carried away you want to get, a whole-house filter is an option. My next-door neighbor the plumber re-piped his house and put a big whole-house filter and softer system in his garage. It's two sealed units about 1 foot in diameter and 4 feet high each. He says they have to be changed every 5-10 years depending on how bad the city water is. I can ask him for the brand and model number if you'd like. It looked like a big job to install, though, not a DIY project. (Even for me, and I'm not afraid of sweating copper pipes.) And I'm sure we're talking at least a couple thousand dollars for the equipment and labor. Laura

I am researching this topic myself. I realize this is months after your question. But insinkerator instant hot has a faucet with instant hot and cold, and it can be filtered or not. There are 2 handles on 1 faucet. My plumber recommended this brand. I have no financial ties or personal experience with the unit.

My aunt had a hot water circulator pump installed after the house was built and she now has the same problem. Makes me crazy, but it's her house. Now it takes forever to get cold water. She even refrigerates water so as to have cold water for the coffee maker. Then there is the fact that she insists on washing all her dishes BEFORE placing them in the dishwasher. So her instant hot water pump is a total waste, in my opinion. In addition, her water is very hard (I just unjammed her dishwasher, which was almost completely blocked with hard water deposits -- two days of soaking parts in vinegar), which makes me wonder about the condition of the hot water circulator pump. Jakethewonderdog: are you saying that there is a way to reduce the problem of hot water from both faucets? Where do we install the temp sensor?