In July 2013, we got an estimate to add geothermal heating/air conditioning to our rather complicated-ly-laid-out house in Harrisburg.
It was heated with oil-fired steam furnace system and had central AC added about 10 years ago. Appropriate duct work is in place for cooling.
Doug (from MidAtlantic GeoThermal) measured all the rooms to be sure the unit would be the right size, but he did not pay any particular attention to the fact that bathrooms and my office have no AC ductwork in place. He also said that the unit would just replace the air handler in the attic. Doug came back at least twice more to discuss plans for the duct work. Up until that second visit, he insisted: ?It?ll be fine. The unit will be the right size."
We have a very windy and steep driveway. Doug said he would bring his ?drill guy? up to check it out. I think they came the first time when I was not home (which is fine). When we needed more conversation about the drilling, he had to bring the drill guy back again. Each of those visits took several days to more than a week to arrange.
In the permitting process (that didn?t start until mid-JANUARY 2014) Middle Paxton Township said we have to use Food Grade antifreeze in the system, something that was never even mentioned as an option or possible requirement. I understand that Lancaster County requires the same thing. So that, too, should not have been a surprise.
There was NO forward motion on the project unless we called/emailed/poked /prodded. We didn?t get a contract to sign until sometime in December 2013. So while we were ready to go in September, we waited until February to get going on the project.
A couple of other useful bits of information:
1. ?We just drill three holes straight down? actually means ?We?ll mess up a spot about 4 FEET by 30 FEET PLUS the distance to hook up to the house.?
- 2. Check your county/township codes to see if food grade antifreeze is required and prepare to pay for it.
The system wasn?t finally installed until March of 2014, at the end of a heating season. We had let the oil in the tank run down to nothing, which meant we were pretty much without heat while they worked.
The man who came to do the installation was knowledgeable and his helper very anxious to be sure everything was as we wanted it. They covered everything where they?d be carrying stuff.
Upon installation, when the original air handler was removed, there wasn't enough room for the unit so another 4x4' space in my attic was taken up and other pipes ran to complete the job)
The antifreeze originally delivered was the wrong kind. Doug brought it to the house and left it on the porch. Then a key part sent with the unit wasn?t the right one and had to be replaced. Then a pipe was the wrong size, and that had to be replaced. Part of those issues were discovered on a Friday (when we really were out of oil) and no body seemed to think that
anything could be handled over the weekend.
In the end, Doug suggested we live thru a winter and see if we really did need to install additional ducting anywhere and suggested that adding one for my office would probably just be ?a couple hundred dollars.?
During the summer, the AC worked well (VERY QUIET!) However, there was about a 4 degree difference between the temperatures in two rooms on opposite ends of the system.
Colder temps came. The unit couldn't really keep up and 4 degrees between sorta-ok-warmth and none a big problem. My office without additional space heaters was about 60-62 degrees.
Ultimately we hired another company to install the additional duct work required and balance the system. The duct work was MUCH more complicated than "a couple hundred dollars." That has been a big help.
However, this is my advice
: unless your house is well insulated and tight, geothermal will not be enough to keep you warm in the winter in central PA.