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A hand held anemometer can be used to see the flow then multiply by area to get the total flow. There are quite a few for under 20$ .


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You are right, that contractor doesn't know what he is talking about. Most inverters will produce power at low wattages as long as the Vmp of the string (maximum power voltage) doesn't fall below the spec in the data sheet for the inverter. Most inverters are actually more efficient when operated below full load. For example the Sunny boy 11000TL-US will has ...


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No. You may risk damaging your unit by running it in cooling mode when it is too cold out (although some systems have safeties around this), but heating in low temperatures should not damage the system. No. A correctly functioning heat pump should not ever drop below 100% efficiency. This is dependent upon the specific heat pump model. Often, manufacturers ...


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If the heat pump has an oporational temp limit it will control itself. Be careful with an awning, it could cause discharge air to recirculate. Not good. Keep the filters clean and don't use much night set-back



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