I'm sure this is as frustrating for the hotel management who has to deal with calls from angry guests on mornings when occupancy exceeds the capacity of the building's undersized domestic water heating system. The fact is, with the right water heaters, properly sized, a hotel should never run out of hot water. Standard efficiency atmospheric water heaters or high-efficiency sealed combustion water heaters can both handle the load equally well, but there is a significant difference between the two in operating and installation costs. Let's look at a "real world" example, based on a new trend in hotels.
Domestic hot water for this type of lodging can represent up to 30% of the hotel's energy operating cost. That's a significant percentage, so investing in a high-efficiency water heating system will pay big dividends down the road. Let me show you how.