ARLINGTON, VA — “The Role of Filtration in Maintaining Clean Heat Exchange Coils,” a research project released by the Air-Conditioning and Refrigeration Technology Institute (ARTI), is now open to bids.

The HVAC&R Research for the 21st Century (21-CR) program bid proposals are due April 11, 2001. The program has a budget of $190,000.

Instructions on bidding can be downloaded, along with work statements, at (website).