Answer:
The journal entries are as follows:
(1) Accumulated depreciation - Building A/c Dr. $250,000
To Cash $250,000
(To record the replacement of heating system)
(2) Building A/c Dr. $750,000
To cash $750,000
(To record the new wing)
(3) Maintenance expense A/c Dr. $14,000
To cash $14,000
(To record the maintenance expense)
(4) Equipment A/c Dr. $50,000
To cash $50,000
(To record the new equipment)