Share 'Hot water re-circ systems'

For those of you who are conducting residential energy assessments; are you recommending "on demand"  hot water re-circ. systems?  I'm finding that many of my customers waste a ton of water while they wait for the hot water to arrive. This is the case even with an insulated pipe because the water is simply wasted down the drain where as a properly configured re-circ system will return the water i…