(a) An old 68% efficient natural gas furnace is used to heat a 400 m³ home in Boston, MA. Estimate the annual savings in $\mathrm { CO } _ { 2 }$ emissions if the furnace is replaced with a $93 \%$ efficient natural gas furnace?
(b) Estimate the annual $\mathrm { CO } _ { 2 }$ savings if the old furnace is replaced with an $80 \%$ efficient

Question

(a) An old 68% efficient natural gas furnace is used to heat a 400 m³ home in Boston, MA. Estimate the annual savings in

\mathrm { CO } _ { 2 }

emissions if the furnace is replaced with a

93 \%

efficient natural gas furnace?
(b) Estimate the annual

\mathrm { CO } _ { 2 }

savings if the old furnace is replaced with an

80 \%

efficient

Quizplus · Accepted Answer

The Answer of (a) An old 68% efficient natural gas furnace is used to heat a 400 m³ home in Boston, MA. Estimate the annual savings in $\mathrm { CO } _ { 2 }$ emissions if the furnace is replaced with a $93 \%$ efficient natural gas furnace? (b) Estimate the annual $\mathrm { CO } _ { 2 }$ savings if the old furnace is replaced with an $80 \%$ efficient

(A) an Old 68% Efficient Natural Gas Furnace Is Used CO2\mathrm { CO } _ { 2 }CO2​

(A) an Old 68% Efficient Natural Gas Furnace Is Used $\mathrm { CO } _ { 2 }$