I have been charged with choosing a new heating and cooling system for the chapel of our non-profit cemetery, and raising funds for it. Pictures of the chapel can be found on the cemetery website at:
This is a beautiful 1913 building full of stone, and mosaic tile work, in a league with such others as Cleveland's Wade chapel (designed by Louis Tiffany in Lakeview cemetery.)
The original Dunham vapor system has been decommissioned several decades ago, and some hidden ducts , and hidden registers put in under side benches. This furnace installation qualifies for the wall of shame, as the ductwork only provides 75% of the needed airflow!
I would like a condensing boiler, placed in the basement, which will feed 2 zones (basement & main floor), which will feed some cabinet style fan-coils, which can be adapted to cold water from a chiller on the outside, installed in phase 2.
The heat-loss of the building is: 269 KBTU at 0 deg X 70 Deg.(in use) once a month or so.
When not in use, the heat-loss could be as low as 115 KBTU at 30 deg X 60 deg.
I am concerned with apparent complexity of some of the controls on such boilers as the Lochinvar WH. How easy will it be for someone to go into the chapel, and change the temperature from low to high? Do these have proprietary thermostats?
Unfortunately, there is no internet, now; but that would be in my plans.
I wonder if I would be better off choosing 2 simpler boilers, such as the Lochinvar Solution, each one rated at about a half of the maximum load, and capable of taking over in the event of a malfunction. They also have ODR, and might be easier to maintain, and more forgiving (like Darth Vader), if they were slightly neglected.
If we didn't have such a necessity for air conditioning, I would put the steam back in operation, as all the radiators are there. The chapel can hold 90 people, so how much cooling capacity should I plan for?--NBC