Callaway 40 Gas Fireplace Spa & Pools the Vanishing Act XL has

the Vanishing Act XL has three times the calcium removal capacity and is the more efficient single-use solution

Pro Tip: Don't be thrown by your test strips after shocking

This improved burner has a low-power cooking function

but the opposite is true with the Bellingham series

Plenty of cartridges share a 50 sq ft rating but differ in diameter

Callaway 40 Gas Fireplace Spa & Pools the Vanishing Act XL hasThe Kozy Heat Callaway 40 is the smallest fireplace in Kozy Heat's premium Callaway architectural lineup but don't let "smallest" mislead you. With a 43 3 8 inch wide 16 3 4 inch tall viewing area (more total flame visible than even the larger Callaway 50), a modulating burner that scales from a remarkably low 16,500 BTU up to 31,500 BTU hr, the full Komfort Kontrol System with smart modulating thermostat as standard equipment, and lifetime ceramic