What is the power input (in kilowatts, rounded to the closed 0.1 kw) for a heat

Question

What is the power input (in kilowatts, rounded to the closed 0.1 kw) for a heat pump system with a COP of 3.0 that would be needed for this home? Note that 1 kw = 3412 Btu/hr. Types of insulation include all except: Fiberglass Rigid Spray foam Thermal bridging Cellulose Advanced framing includes all the following techniques except: Single header above windows Single studs at window and door openings Single top plate Two-stud corner 16" stud spacing Metal studs have thermal bridging that typically reduces wall R-values by about: 10% 25% 50% 75% 90% An electrician removed 10% of the insulation in an attic. A cable TV contractor removed another 20% of the original insulation. The originally had an R-value of R-25. A blower door test on the house resulted in 2200 CFM50. How much did the removed insulation reduce the attic R-value by, approximately? 76% 66% 56% 46% 36% The house in Question 1 above has a blower door test result of 2000 CFM. Does it need mechanical ventilation? Explain why.

Explanation / Answer

1. d) thermal bridging

2.e) 16" stud spacing (Advanced framing includes 24" stud spacing)

3. c) 50%(Metals have thermal bridging that reduce R value by 50%)

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