Rob

Consider your current EGA make, have you been happy with product, price & support ? If so you may save on calibration costs if use can do a deal as both can be calibrated on the same visit.

Also how old is the EGA ? If a few years old may be worth doing a deal on combi unit, or at least taken in to consideration cost of upgrading smoke to combi at some time.

probably just added to your confusion

Cheers Aidan