[LurkerAtTheGate]

This was exactly my fear when designing my new house - I wanted to build a hybrid (heat pump and gas furnace) air-conditioning and water-heating system for a home in a climate with very cold winter and increasingly hot summer. Despite providing charts on efficiency & cost savings, and a detailed plan for installation, I eventually gave up. If I couldn't make builders, plumbers & HVAC techs understand, I'd never be able to get it serviced; If the techs couldn't understand it, I'd never get a future buyer to understand it either.