BPI Heating case studies
BPI Heating · Put your knowledge to work in context.
The Heating Professional credential is one of the certifications listed by the Building Performance Institute (BPI), a non-profit organization that describes its mission as advancing the home performance industry through nationally recognized standards and credentials, with the goal of making homes comfortable, healthy, safe, durable, and energy efficient. The Heating Professional designation appears on BPI's current certification roster alongside credentials such as Building Analyst, Energy Auditor, AC/Heat Pump, and Air Leakage Control Installer. The BPI Heating case studies are 5 cases and about 3,602 words.
1Cold Upstairs and Sweating Windows: Sizing Question
A 1,900 sq ft two-story house built in 1992 has a single-stage 80% AFUE furnace rated 90,000 BTU/hr input in the basement, one centrally located return, and a single first-floor thermostat. On a 12°F night the homeowner reports 68°F downstairs, 61°F in the upstairs bedrooms, and heavy condensation on the second-floor double-pane windows.
679 words, about 3 min2Backdrafting Water Heater in a Shared Chimney
A 50-gallon natural-draft atmospheric water heater shares a 6 ft x 8 ft mechanical closet with a Category I 80% furnace. Both vent into a single 5-inch masonry chimney about 10 ft tall.
737 words, about 4 min3Condensing Furnace Installation Review in a Crawlspace
A 96% AFUE condensing furnace is installed in a vented crawlspace. The installer ran 2-inch PVC: 18 ft of exhaust with four 90-degree elbows and 12 ft of intake with three elbows, terminating both pipes on the same sidewall 14 inches apart horizontally.
827 words, about 4 min4Commissioning an 80% Furnace With Conflicting Data
An 80% AFUE furnace with a nameplate input of 110,000 BTU/hr and a rated temperature rise of 40-70°F is being commissioned. The technician records: manifold pressure 3.2 in.
654 words, about 3 min5Bedroom Comfort Complaint After a Furnace Replacement
After a furnace replacement in a 2,400 sq ft ranch, the homeowner complains that the bedrooms at the end of the trunk are 5°F colder than the living room. The contractor installed a 100,000 BTU/hr 96% furnace with a 4-ton blower, reused the existing 20 x 8 trunk and 6-inch branch ducts (eight supplies), and set the blower to the highest tap.
705 words, about 4 min