I’ve been using one for about 6 months. It weighs 14 lbs since its hollow. But as we all know, air is a great insulator.
People in warm climates have to fight high temps, so cooling the bottle in the summer is VERY common. Seal up a car in the summer, even in NY, and the bottle temp can get above the sweet spot. Remember, when it comes to bottle pressure, more isn’t better. Just right is just right. Typically 900-950 psi is the desired bottle pressure for most racers. Some run a little higher if they are limited on jet or line size in order to shove more nitrous thru the system.
I did some cost calculations the unit can pay for itself in about a season if you race a bunch and typically purge a lot. So the high initial price does give you a payback. Nitrous is about $4.00/pound and a typical 50 psi purge uses about a pound. So that’s $4.00. If you make 100 runs a year, that’s $400. Lots of people make 200-300 runs a year if they are die-hard racers.
NX’s Fire and Ice isn’t enclosed, so the bottle loses/gaines heat a lot faster. It also pulls a bunch of amps and will zap your battery quickly. I hooked a multimeter to mine and it pulls right at 5 amp when running. Blanket heaters and the Fire and Ice pull about 25 amps!
Its a good product for the serious nitrous user or those who love to have the latest technology.
Hope this helps.