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2258
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City of Columbia Heights
590 40th Avenue NE
Columbia Heights MN 55421
Attn: Linda Magee
January 5, 2010
RE: Combustion Air
The combustion air opening for the boiler in the old Police Department area is just an opening in the wall with a
louver, so cold air dumps into the room making it very cold. If the boiler failed, it would freeze pipes.
NS/I recommends adding sheet metal to duct the cold air down to the floor level and installing a sheet metal cold
air trap at the bottom to prevent the cold air from flooding into the boiler roam.
TOTAL INSTALLED COST ................................................................. $1,580.00
__ _ .._ _ QNE..,THOUSAND FIVE HUNDRED EIGHTY DOLLARS 00/100 --------- ----------- 1 580.00
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