I installed a MRCOOL DIY unit in my shed. This unit is a heat pump as well. I only run it when I need to go out when its too hot or too cold. It works really well.
The installation process wasn't bad at all. I did everything. The tricky part was definitely connecting the coolant lines and getting them properly torqued. The lines are vacuumed out and sealed. They use special connectors to maximize the that you won't mess it up. All in all, I love the unit. It works great in hot or cold weather and the unit is rated at 20 SEER. It took ~6 hours to do everything. It was >90 degrees out so I was very happy when it started cooling right away.
A normal unit needs a vacuum pump and a little more care. That would put me off now.
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Originally Posted by masraum
Ok, for you self installers. What's the installation like?
Our house is old and poorly insulated, but we've got a heatpump that was built/installed in 1991 that keeps us cool in the summer and mostly warm in the winter.
Downstairs is ~1000sqft. Upstairs is about 500sqft. Downstairs is main/full bath, kitchen, dining, living, and office. Upstairs is 2 bedrooms, tiny half bath and a central room. We currently have a single heat pump with with ducts to all rooms including another room that's going to end up being a closet.
It seems like it would be prohibitively expensive to put units in all of those rooms. Although I guess if I could do the install myself, we might save enough for that. Of course, that would mean a ton of installation.
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