Problem: You are working for a wealthy elderly client who, because of health conditions, is extremely concerned that no matter what the circumstances are during the heating season, they must stay warm. You have carefully done load calculations for the building and included a safety factor. Your calculations result in a Design Heat Heating Load of 56,700 KBtuhs. Which of the following Boilers would you recommend. Remember cost is not an issue. Select one: a. Unit: Size 80 KBtuh; Cost $5000 b. Unit: Size 40 KBtuh; Cost $3000 c. Whichever one you can make the most money on. d. Unit: Size 100 KBtuh; Cost $6000 e. Unit: Size 60 KBtuh; Cost $4000