My base kit is the Adventure Medical Kits Adventure First Aid 2.0 First Aid Kit. To that I add an extra large ace bandage, a hemostatic agent such as Celox/Quikclot, steri strips, and then a few extra medications such as anti-diarrheal that aren't included in the kit. Here is an excellent First Aid Kit article that I always refer people too.
Yeah I want to get one for home emergencies or camping.
Saw one on the amazon deals of the day: https://www.amazon.com/Mr-Heater-F232017-Indoor-Safe-Portable/dp/B01DD6C4MY/ref=gbps_img_s-3_bb19_2e2a1c6b?smid=ATVPDKIKX0DER&pf_rd_p=41fd713f-6bfe-4299-a021-d2b94872bb19&pf_rd_s=slot-3&pf_rd_t=701&pf_rd_i=gb_main&pf_rd_m=ATVPD...
https://www.amazon.com/Industries-JDI-FST15-15-Gallon-Portable-Station/dp/B07R6T3Y86
That's what I'm using. It can be mounted in my truck bed but most of the time it lives on a dolly. It's well over 150 pounds loaded up, so me + wife to lift it off the truck, but I can do it by myself. I have used gas cans a lot in the past, and they're fine, but I wanted something much beefier.
Those industrial ones can be quite loud even on "low" settings as they are designed for, well, industrial use.
We have had good luck with the Winix plasmawave air cleaners. For example: https://www.amazon.com/Winix-5300-2-Purifier-PlasmaWave-Reducing/dp/B01D8DAYBA/
The lower price means you can have them in multiple rooms. Ours has a remote, and it auto senses odor and air quality and adjusts the fan appropriately.
This is the one I use: https://www.amazon.com/gp/product/B01D8DAYII/ - Winix 5500-2.
I have two of them.
For folks on an HSA, YSK that if you have allergies you can get an HEPA filtered covered as an HSA expense with a doctors note.
In addition, if you have an HSA, over-the-counter first aid kits are also good emergency supplies you can expense. This includes tourniquets and stop-the-bleed supplies.
Iv use this a bunch on open fire and on camping stoves and it’s always does the trick. The cap to the water bottle isn’t the best but it works.
Goetland Stainless Steel WWII US Military Canteen Kit 1QT with 0.5QT Cup Nylon Cover G.I. https://www.amazon.com/dp/B076WZ3384/ref=cm_sw_r_cp_api_i_L1TsFb6W03SKA
Mine is similar, except I think I have their Mountain series Weekender kit. And I added an Israeli Bandage to mine, hopefully I never have reason to use it.
Something to consider with a PVC shower, is supplementing your heat. Best way I've found to do so is to use a heating element like this one and couple it with a temp controller. This runs off 12v DC so you'd have to take into account electrical capacity, but I figure I could run that while on the move so the vehicle alternator takes the load, or from an onsite generator if you're in a fixed location.
Disclaimer: I have not run this yet, I'm still in the planning phases of a PVC shower. This was found through research.