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Summary... 100% add the duct work. It will be cheaper in long run, look better, and will increase resale value of the home. Few things here: Once you add those walls/ceilings (given it is not a drop ceiling) adding duct work will be very costly and messy. This is sort of like running ethernet cable throughout the house, but air ducts probably have ...


7

TL;DR Space heating doesn't make sense in a typical US house that already has duct work in place. There are, broadly speaking, 3 types of home heating in general use in the US: Fossil fuels - Natural gas (generally most cost effective) or oil. If you have this, it would definitely be forced air, as that matches "duct work". Electric resistance ...


5

One thing you could consider would be to install dampers in the duct work to close off various legs of duct. This would allow you to have heat available anywhere in the house you want, but to close off areas from heating when you don't want them to be heated. This would, effectively, give you multiple zones, though they'd be manually controlled. Also, adding ...


1

Heat loss or heat gain is how fixed heating is installed. What that means to keep a uniform temp in the room we put registers under / over windows . Where the outside temp affects the room more. I don’t find mini splits following this quite as much possibly because there air discharge is 3-5x the area of a fixed vent and the minis usually have active vents ...


1

I'm currently running such a setup with an Aprilaire 8620W thermostat. AC from the heat pump, Heat from the heat pump when outside temp is >=40F, Emergency Heat from the boiler kicks in when outside temp is <40F. The thermostat initially installed was a Honeywell model, and that could be configured to support AC, or could be configured to support Heat,...


1

In summer the attic is heated by the sun through the roof and windows and also by warm air rising from the rest of the house through the staircase. Closing the attic door would reduce the amount of warm air rising, but that is not the main source of heat. The sun is. And closing the door also decreases the flow of air from the attic registers back to the ...


1

Two separate issues here: Attics Get Hot! This is a fact of life. Attics heat up from the sun all day long. Color and type of roof can make some difference (reflection vs. absorption), but it is quite normal for an attic to get really hot. The usual solution is an attic fan. This can be thermostatically controlled so it only runs when hot. For an attic fan ...


1

Yes a refrigerator compressor can pull a vacuum but it may not last long because as you reach a vacuum there is no air to transfer the heat away from the windings. The heat buildup and motor failure this is something taught in hvac training when you pump Down a system using its own compressor. you don’t run it at a vacuum or you will smoke the compressor ...


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