Five days into installation, replacing an oil-fired boiler. There's the notion that it is the consumer that "doesn't get it." Not the case here. Day five on Vitacon 100 condensing boiler. I hate it. I am cold. Some component is running almost constantly, without any benefit of heat. I have not altered the thermostat temperature. The heat is not dry heat. The unit came with a defect – a missing "wire"? The hot water – flapper? (And there should be a deep manufacturer's discount for that). I would not have switched from an oil-fired boiler to this, if the oil guys had worked harder to find some way of getting a new boiler into the basement, and placement for a new oil tank. (Also they have now lost all business from me that they've had for 11 years). This old house needed the dry heat that the oil furnace supplied. You could tell me that I am imagining that it is now humid (and cold), but I swear I'm not.This took all my savings. The installers, who are "highly qualified" explained nothing about the function of the thermostat, but I asked. If there is an outside sensor to this piece of crap, I'd like to know where it is and if it is working.Sure. The installers will be called back, but what are the chances of any correction. And, if improperly installed, (and I wonder how they could have mounted this thing on a piece of 1 inch plywood sitting on a damp basement floor, and the plywood will rot), there is nothing to do about it. Also, there is the cost of the lease of the propane tanks. The oil tank was "owned." Today, the tanks, delivered with less than 80% full for delivery, were topped off. At a thermostat setting – there are two thermostat's – one upstairs, and one down – of 64 degrees, one person in the house. Electric stove, refrigerator, washer and dryer, I'd like to know how it is that the tanks took 163.1 gallons of propane in under 5 full days.The old oil-fired furnace cracked. But until then, the heating was consistent, efficient like crazy, and provided safe comfort, without those blasted tanks looming outside. Entire savings gone, and cold. And it takes a full 25 seconds for hot water to come out of the kitchen faucet, which is located not 30 feet from the boiler. Either I capture that water in a pan so that I can add hot water to it to use for washing dishes, or I am wasting water. I'm betting the water meter is having a field day. Until now, the water and electric uses had been way below the standards. What a blasted waste of everything. If this is also an installer's failure, just what does anyone think the chances are of them owning it. If there is any way you can avoid replacing your trusty oil-fired furnace, (and the one here also heated water), do it. Take off the side of your house if you have to get a new furnace to fit. PS Why did that woman from Maine give this thing 5 stars when she hates the noise – which I hate, too.