Installing a Broan ERV 200TE in San Diego California, existing 1950’s house

Don’t really need an ERV here since the climate is so mild, but what the heck. May be adding ductless mini split system in the future, just for the couple weeks each year when we need heating/cooling. Will see how the ERV does on it’s own.

Do need the ventilation to control allergy and noise problems. I chose this model specifically because it has a HEPA filter.

Currently in the planning stages for the task of air sealing the existing exterior envelope. Couple items I could use some advice on:

1. Best material for air sealing the vented crawlspace. I’m looking at Proclima mento 1000 and Intello, as well as Certainteed Membrain. I’d like to keep the material vapour permeable.

2. Best material for insulating the crawlspace ceiling (wood joists with lots of pipes in the way). Sprayed cellulose or batt? rockwool vs. fiberglass batt?

3. Guides for air sealing the remainder of house (exterior walls and vented attic)? These are pretty typical, I’m guessing someone has put together guides with details and specific materials.

thanks for any help!