Hi, I'm part of the Alders HOA. We recommend having your dryer vent serviced annually. I wholeheartedly agree. I don't see how to attach photos here but we discovered a large bird nest in the vent that was definitely a fire hazard so I'm thankful we had it cleaned.
As for fireplace flume service I did mine for the first time in the 5 years since our place was built and it was in good condition. Our HOA recommends doing this annually as well.
You didn't ask but our HOA also recommends annual boiler maintenance which I've kept up with and it's been helpful in keeping it running reliably.