My ex has an ingenious chain of devices under his sink. The first filter is a Sears type that the cold water runs through, and up to a separate tap on the sink for filtered cold water. He also runs water from that filter into the under sink hot water tank that keeps a quart or so hot at just below boiling for tea and cooking and such.

I have resisted buying refrigerator/freezer units with taps and ice makers for years, because they are usually what break first. But when I bought this house and needed a fridge, the Sears on our side of town was closing to relocate, I found a deal too good to resist on a floor model (about 35% off) and it has the water and ice maker. It does a good job, and I buy the filter that removes more of the problem elements than just the flavor or smell issues. Costs about $80 a year for the filters.

Rather than go to the trouble to buy and install one of those under sink water heaters, which typically needs to be completely replaced every four or five years, I spent $50 for a wonderful steel kettle (Cuisinart--I looked a long time to find one that didn't have exposed weld points and wouldn't be heating the water against or in various forms of plastic) that sits on a base and has a simple switch. It turns itself off when it boils, and only takes a couple of minutes to boil about six cups.

SRS