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6

In theory this is what HVAC professionals are supposed to do. In practice, most of them rely on antiquated rules of thumb to size equipment and use existing ductwork, even if it has major problems. A certified energy rater is who you're looking for and who will be able to definitively tell you what you need to know, but you can learn a lot yourself to be a ...


4

It should be fine. Air conditioners remove heat and dump it outside; sounds like the heat got dumped into the cover. Remove the cover, let the unit cool down, and don't do it again. If it stops working, call a service tech.


2

Give the ivy a few more weeks, and some compost to help it along. Wrap the bundle in a mesh to give the ivy more purchase. or put a short section of trellis in front of the bundle/wall for it to grab onto. Disappearing bundle, like magic. Shrubs if you feel you must, but given the ivy is already working the area, let it work.


2

Mine was freezing over and not cooling the house. I had recently replaced the filters so I made sure all the vents were open. I noticed there was no airflow so I checked the A/C coil up in the attic... I pulled the panel off and it was completely blocked by lint. I used a wide vacuum brush and sucked all the crud off and now there's airflow again and the ...


2

Is this a heat pump with supplemental gas heat? Sounds like the shuttle valve is stuck or something in the cycle reversing has failed, heatpumps do both AC and heating. Why double the misery by having two systems to fail and not having the current one repaired/replaced? As to new systems, you can get very efficient heat pumps with supplemental gas heat, ...


1

IMHO: I don't believe the position makes any difference. The pressure in the main duct, for all practical purposes, is uniform. There is a slight loss at each exit duct along the main duct, but the original main duct should have been designed to handle this. However, if you added the duct to the end of an existing system, and the duct is comparatively too ...


1

The fan in an air handler is typically stated to have a flow rate at a given static pressure (e.g. page 7 of the Lennox CBX25UH air handler specifications here). In my experience, almost all pressures in HVACR are stated in terms of gauge pressure; as you suspected, 0.5 in w.c. is a gauge pressure (generally noted as in w.g.). Some fan flow rates are stated ...


1

The Tee was left open as a means of a clean out. Start by using a shop-vac on that Tee and hold your finger over the other end, in the pump (you may have to get the pump out of the way). Next, snake it out, going into the machine: (e.g., the brush that comes with an EZ-Trap; johnstonesupply.com) Followed with another vacuuming. Ideally the first go ...


1

Unless you are an abnormally equipped layman, no. Even then, there may be a legal requirement (depending where you are) for this to be done by a licensed A/C service person, as regulations around refrigerants have become much more stringent over the years, trying to limit uncontrolled releases to atmosphere.


1

I think the outdoor unit fan turning off while the AC is still running is normal - I know that happens quite often in my own home (and my previous home), and the AC has always worked fine. As for the temperature, how new is your thermostat? In my current house, I have a thermostat from about 30 years ago (one of those dial-style thermostats), and while it ...


1

After checking with the building maintenance, the super said, because the building's main system is in "heating" mode and haven't switched back to "cooling" mode, the HVAC will automatically override and turn off the compressor. The building officially switched to "cooling" mode yesterday and my HVAC is operating as normal again. As it turns out, it is the ...


1

A MERV 13 filter should not let much if any pollen get through. If you still have pollen getting past, it is likely leaking around the filter. I would check that the filter is secured tightly in the HVAC system and that there is no place for air to bypass the filter. To increase filtration of existing plain filters, you can also spray it with a tackifier. ...


1

You'd need an air-handler somewhere downstairs, taking up the same amount of space (and nearly the same cost) as a furnace. I can only assume that the increase in efficiency is due to having the unit being within the building envelope, instead of on the roof. Do a full, new split system downstairs. I might endeavor to have the old unit remain as a back-up, ...


1

You could always put some sort of planter box in front/over it, like an upside down window valance. Something like a brick planter box


1

There are a few options. You can get some brown gutter downspouts, cut out the back end and mount it over the pipes. I think the downspout will look better versus the gutter because of it's uniform shape. This is commonly done in my area but it is installed at the same time as the pipes so that the pipes can run through it without having to cut the ...



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