A large hotel or hospital is a small district-heating system in disguise. Hundreds of rooms draw domestic hot water in sharp morning and evening peaks; the in-house laundry consumes steam for washers, dryers and flatwork ironers; kitchens want steam kettles; pools and spas need constant low-grade heat. Hospitals add the most demanding load of all — the central sterile services department (CSSD), where autoclaves require dry, reliable steam every hour of the day and a failure has clinical consequences.
The right architecture is usually a pair of packaged fire-tube units — hot-water WNS boilers for building services, and a smaller steam unit where the laundry and sterilization loads justify it. Quiet operation, compact plant rooms, automatic unattended running and high turndown matter more here than raw capacity: a resort's load at 3 p.m. may be a tenth of its 7 a.m. peak, and the boiler must follow that without short-cycling.
For Philippine resorts and city hotels alike, gas or diesel-fired WNS units with condensing economizers keep fuel bills and plant-room footprints small, while N+1 sizing ensures a single boiler can be serviced without a single cold shower upstairs.