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How Much Do You Know 11?

Questions

What are the purpose of filters in an HVAC unit?

All boilers produce steam.

Due to environmental concerns, many gym floor finishes now use water-based finish with lower VOC's. VOC's is an acronym for what?

A buildings envelope is the outside walls, windows, doors and so on that envelope the structure.

An infestation of ants and some other insects can be sprayed for any time day or night?