Wilo EcoStratos is the only one available right now in residential sizes. I think Grundfos is the next up to bat with the "alpha". I've only used one so far... going to see how it goes... but the technology is the future, for sure. it's been big in (of course) europe for quite some time, and in commercial sized systems.

Wilo. I just attended one of Ziggy's courses and think you will find they will last for decades. Motors like to run and if you have ODR, they should run for the entire season.

I have several specified, check back with me in a decade or two:).

Actually, with multiiple, muti-speed pumps, it is possible to use less energy as each is designed for a specific task and energy is used by pounds of water moved. I my zones are unusually different e.g. heat exchange or snow meltiing, radiant floor in basement and one for the garage I might opt for many pumps. These pumps rarely run at the same time and properly balanced, use only the energy they must. This is a very common commercial practice.

Lets face it, if it was easy we wouldn't have much to do.

I like it,
Dan

right sizing pumps are very important it's true. but until they make properly sized circulators for residential zoning... which they don't, unless you're aware of an optimized 1 GPM pump out there I haven't seen... that pump does not exist for zoning these days. when you have multiple temperature loads, obviously you have no choice but to pump. at least until someone invents a mixing zone valve ;)