How Often to Change Every Filter in Your House
A walk through every filter in a typical house, what actually governs each interval, why annually is usually the wrong answer, and the size trick worth doing once.
Guide
Property records · PR-07
Filter Change Log
A free printable log of every filter in a property — heating, ventilation, water and extraction — with sizes and part numbers recorded once.
Download Free · no sign-up
2 pages. Choose your paper size — both versions are laid out identically, so neither one gets shrunk to fit.
Print it and write on it
Fill it in type and save
The fillable versions have real form fields — open them in any PDF reader, type into them and save. Printing help.
What this sheet is for
Stop measuring a clogged filter in a dark loft. Write the size down the first time, then reorder without taking the old one out.
Who it is for
Homeowners and landlords with ducted heating, ventilation, water filtration or extraction to look after.
How to use it
- Walk the property and list every filter you can find, including the ones you have been ignoring.
- Record the size or part number the first time you change each one.
- Note the interval the manufacturer gives.
- Buy spares in pairs and note where they are kept.
What is on the sheet
The layout is fixed at a size that fits both A4 and US Letter, so the A4 and Letter files are visually identical and print at full size on either. Rows are set at a height that an adult can actually write a date and a few words into with a pen — most printable tables are built in a word processor and never tested with one.
Read next
How Often Should You Service Everything in Your Home?
A reference to how often the systems and machines in a house need servicing, why the intervals differ, and how to find the right figure for yours.
Guide
Pool and Hot Tub Water Records
A spot reading is one frame from a film. Logging chemistry as a series shows what your water is doing, and filter pressure tells you more than you think.
Guide
Related sheets
HVAC and Heat Pump Service Log
Separate the annual professional service from the filter changes you do yourself, and keep both on one sheet.
HS-03 2 pages
Appliance and Equipment Register
Collect the numbers you can never find when something breaks: model and serial numbers, install dates, and when the warranty runs out.
PR-03 2 pages
One new sheet, most weeks
We are building this library out steadily. Leave an address and we will send the new sheets as they are finished — nothing else, and no more than one email a week.
Sign-up is not live yet — we have not connected an email provider, so this form is switched off rather than quietly collecting addresses.