Residential Systems, a division of American Standard Companies in Dallas, said that it would allow its Trane and American Standard dealers to apply co-op funds to membership in the Service Roundtable, the industry's largest private contractor group. "Residential Systems has a long track record of providing our dealers with outstanding support," said company president Dave Pannier. "We see the Service Roundtable as another element in our dealer support efforts. A large number of Trane and American Standard dealers are already members of the group and speak very highly of it."