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Why is a MERV-16 filter not recommended for residential furnace use? Urban myth?

My trane is 19 years old this year with a Honeywell 20x25 media filter on it and I've been running a Lenox Merv 16 on it for 15 years. I've only changed the igniter. Two stage variable speed. The ...
TooTall's user avatar
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Home preparation for air conditioner installation

If your goal is optimal energy efficiency, first have an energy audit done on your home. You don't say where you live, but many local utilities will provide a free or low-cost energy audit of your ...
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How to set temperature and mixing valve for heat pump water heater?

The mixing valve is what sets the temperature of hot water delivered to the house. You can set that by experimentation; there are standards but usually the essential thing is that it be below scalding ...
keshlam's user avatar
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How to set temperature and mixing valve for heat pump water heater?

For a heat pump water heater, lower temperature settings are more efficient because the temperature differential on the heat pump affects its operating efficiency. For a resistance heater, that doesn'...
Ecnerwal's user avatar
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