All 15 posts
How Often to Change an HVAC Filter: One to Three Months
Six steps to swap it, which way the arrow points, what MERV your blower can take, and the gap around the frame that sends dust straight to the coil.
September 10, 2026
How Insulation Works When Your Attic Hits 130 Degrees
What R-value actually measures, why a Pasadena attic beats the number on the label, and the one kind of insulation a heating and air contractor owns.
September 10, 2026
Monitoring Air Quality in LA: the Short Version
The AQI scale in one screen, the two places to read your own street rather than a regional average, and the small indoor monitor that covers the house.
September 10, 2026
How to Monitor Air Quality in LA, Indoors and Out
What each AQI band means, where to read your own street instead of the regional average, and the filter change that helps on a smoke day.
September 10, 2026
Mini-Duct Systems: Central Air for a House With No Ducts
Flexible tubes roughly two inches across thread through joist bays. The air noise, the labor that drives the price, and how it compares to ductless.
September 10, 2026
Where Your Ducts Lose Air, and How to Find It With No Tools
Ducts leak at the joints and lose heat through the wall. Where each loss happens, a door check that needs no tools, and what a sealing job involves.
September 10, 2026
Signs It's Time to Change Your HVAC Air Filter
A 1-inch pleated filter lasts roughly one to three months, sooner once it has gone gray, and the arrow on the frame points toward the furnace.
September 10, 2026
Bad Air Day in LA? What to Do With Your HVAC System
When the AQI turns orange or red, almost every useful move runs through your system. Close up, recirculate, fit the right filter, and set up one clean room.
September 10, 2026
What a Real Duct Job Includes: Eight Steps on the Quote
Mastic or UL 181 tape, never cloth duct tape in a hot attic. Title 24 wants R-8 on new attic ducts, and a change-out triggers a leakage test.
September 10, 2026
Duct Insulation R-Value: Why Attic Ducts Need R-8
Supply air leaves the coil near 55 degrees and the attic sits at 130. What R-4.2, R-6 and R-8 mean on the jacket, and why sealing comes first.
September 9, 2026
Duct Sealing or Replacement? Three Readings Decide It
Leakage, static pressure and the condition of the jacket. Gray flex that flakes and a single undersized return are replacement, not something you seal.
September 9, 2026
MERV 8 or MERV 13? What Your Blower Can Actually Pull
A 1-inch MERV 13 can starve an older system with one small return. A 4-inch media cabinet gets you there at roughly the resistance of a MERV 8.
September 9, 2026
Seven Signs Your Ducts Leak, Starting With One Cold Room
Dust back days after cleaning, doors that swing shut, longer run times each summer. The Department of Energy puts typical loss at 20 to 30 percent.
September 9, 2026
Is a whole-home air purifier worth it? What it can't do
In-duct filtration catches particles, not cooking odors or traffic fumes, and it will not fix a return duct leaking in a 130-degree attic.
September 9, 2026
Wildfire smoke and your AC: filter, fan, and what to skip
MERV 13 catches smoke-sized particles if your blower can pull air through it. How to set the fan, close off outside air, and what makes it worse.
September 9, 2026Schedule service
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