Why wait for the HVAC rep to replace your filter, Do it yourself with our Honeywell Air Filter High-Efficiency TRN1727T1/U, 17.5x27x5 - MERV 10. Its designed to fit Trane or American Standard Perfect Fit. This filter can capture a high percentage of airborne particles, including microscopic particles. It carries a MERV 10 rating up to 20 times more efficient a typical five-5 in. pleated filter. The filter also exceeds Honeywell FC100A1045 specifications.