Review on Manometer URPRO Differential Ventilation Measurement by William Pacino

I don't recommend adjusting the pressure in the firebox yourself, but I made my own and it did the job perfectly. The accuracy isn't as great as the many digits on the display (accuracy only goes to 0.01) but still good enough as you can type it between two digits and it's pretty close. I am not HVAC certified and take no responsibility for the information contained in this review or for the accuracy of this review.