Raypak X-Therm Series Ultra-High Efficiency Water Heaters

999 MBTH to 4,000 MBTH
Indoor and outdoor models
97% efficiency at full fire
Condensing, Cat IV venting required
Brass headers and pumps with copper (cupronickel opt.) finned tube heat exchanger
50°F minimum continuous inlet temperature
Modulation up to 12.5:1 turndown
On-board diagnostic center, real English, no codes
Primary-secondary piping required
VERSA IC® control package
Built-in cascade function for up to 4 boilers
Low NOx