PopTop Compatibility: Features the quick-release actuator interface for simple

using OEM HVAC replacement parts is recommended to maintain system efficiency

the 49L90 is technically identical to the 49L9001

Features a robust 8-13 psi nominal spring range for stable control and fail-safe operation in pneumatic loops

Carrier 48CH402274 Heat Exchanger 322057-301 PopTop Compatibility: Features the quick-releaseThe Carrier 48CH402274 Heat Exchanger is an essential OEM replacement part engineered specifically for high efficiency Carrier rooftop units and commercial gas electric packaged systems. As a veteran technician knows, maintaining the integrity of the combustion cycle is paramount; this direct fit heat exchanger ensures maximum thermal transfer while preventing the mixing of flue gases with the supply airstream. Constructed from durable, corrosion