Air Filter Quality

CALLER

• Wendy is using the EZ Flow green air filters in her system because they’re affordable and she changes them twice a month. She asks about the quality of these filter. We explain why they are called ‘rock catchers’ that allow more dust to go thru the system

COMMENTARY

• Dust is the primary enemy to air conditioner efficiency
• Recommend a MERV 8 one inch paper pleated filter changed every month provides superior filtration and better airflow
• Slightly more costly filter protects the system leading to long term savings

HVAC Questions

TEXT

• Greg in Gilbert asks are media filters worth the extra cost? Media filters differ in thickness and MERV rating impacting airflow resistance
• The risks of self-cleaning nylon filters that rely on static electricity, clog quickly requiring frequent hosing off

CALLER

• Greg has an 8 year old 14 sear heat pump using a Nest thermostat. He’s finding his unit shuts on and off more at certain temperature settings versus a setting that allows it to run longer.
• Maintaining a steady temperature is generally better for system longevity
• Effective home comfort depends on the home’s thermal envelope: insulation, duct sealing, air leakage
• Demand rate utility plans influence optimal thermostat strategies for cost savings

A/C Refrigerant

CALLER

• Ted has a 12 year old 2 stage unit. Had a recent repair done but was told it needs to be replaced soon. Shocked at the prices of new units so much he can’t afford another 2 stage
• Explanation of new refrigerants R32 and R454A replacing older R410A units
• Coil repairs are costly so replacement might be more economical
• Stresses evaluation of your home’s insulation, ductwork before you buy an A/C