P$8\mathrm{.}2.$

Background: It was observed that the condensate return tank for the boilers was hot and uninsulated.

Recommendation: Insulate the surface area of the condensate return tank to reduce the heat loss.

Question: What is the estimated cost saving?

Data

Surface temperature of the tank: $152F$

Ambient air temperature: $75F$

Hours of operation: $8h\frac{r}{?}$ day, $5$ days$/$week$,50$ weeks$/$year

Diameter of the tank : $3$ ft

Length of the tank: $5$ ft

Fiberglass insulation materials and labor: $$10\mathrm{.}5$ per sq$.$ ft $.$