Smart+ Products, Heater, models:

SPP-1000-4WC	Instructions Manual
SPP-1500-4PR	User Manual
SPP-1800-6WC	Owner'S Manual
SPP-4PC-1000	Owner'S Manual
SPP-500-1WP	Owners Installation And Operating Manual
SPP-WI0035	Manual
SPP1500SBH	Owner'S Manual