Overview Other Details Reviews Product Description TR40 WALL MODULE, TEMP AND CO2, SYLK Other Details 0.144 Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Honeywell Honeywell TR40-CO2 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments