ICF home - 3750 sq ft - geothermal heat/DSH/Electric water heater - Cleveland Oh - AlpinePure HRV "APHRV200V"

Getting my blower door test done this Friday.  Sealed up all the service penetrations real well so I hope to  get a very low ACH50 score. 

The folks doing the test asked if my dryer vent and HRV vent had louvers on them.

The dryer vent does - the HRV vents (both) do not. 

They said that they will "tape them up" when they do the blower door test.  Here is the email quote from the testing company:

"Your HRV unit should have an automatic damper if not that can be corrected at a later date.  Our technicians will tape off any openings to perform the testing. Therefore no urgency for the test."

Questions:

Do I have an "automatic damper" already?

Do I need louver covers on my HRV vents?

Thanks

Todd