The Lamberts had finally had enough. Their house in Golden was not warm. Their bills, for a moderately sized house, were astronomical. They had been discussing going tankless for a few years, but didn't think they could afford it. When we showed them the price, they were pleasantly surprised and said "Let's do this! a week without heat is enough!"
We removed their old, inefficient cast iron boiler and replaced it with a Navien NCB240E combi boiler that does both their space heat and hot water and freed up half of their closet! They told us it's more comfortable than it's ever been in their house!
Here are the before and after shots: