Below are system manuals for HVAC and water heater units as well as links to helpful maintenance info and trade referrals.
LENNOX HVAC MANUALS:
Lennox_XC21(Ver.04-current)
Lennox_XP16_Manual
NAVIEN WATER HEATER MANUAL:
Navien-Owners-Manual
LINKS TO MAINTENANCE INFO/CALENDARS:
-Embed Maintenance Reminders in Your Google Calendar:
Click Here
-General Maintenance Advice (By System):
Click Here
-General Home Maintenance Manual/Check List:
Click Here
-Life Expectancy of Home Systems:
Click Here
MAINTENANCE LIST:
For a bullet list of maintenance recommendations
CLICK HERE
REFERRAL INFO:
Trade referrals can be viewed
HERE