Since I live just north of Seattle, the winter temperature rarely dips below
forty degrees. And - since ground source heat pumps are more expensive
then regular heat pumps would it make more sense to install a regular heat
I have propane heat now and could use that as a backup for cold snaps, but
the price of propane is now sky-high.
A good installer can do a payback analysis, but at those minimum air
temperatures an air-exchange will be adequate, certainly and unless you
have a very ready ground source (like an adequate-sized lake real close
to bury an exchange loop in) the payback time will be quite long...
In the UK the running cost of a GSHP (COP about 3.5) is a lot less than an
ASHP (COP about 2.0) but the capital cost of GSHP does make it expensive to
You generally get best performance when a heap pump is matched with low
temperature heating system such as UFH.
The way I look at things, money spent now to reduce my future cost of living
is well worth it.
I've spent thousands of dollars in the past on things which will reduce my
energy bills. Now my electric bill is $30 a month and I have a car which
gets 38 mpg. All those things are paid off and I now have a lower cost of
living. So I'm *very* glad now I did these things in the past. (Back then
people would have told me to invest my money instead of spending it on my
energy saving home improvements. Well I'm glad I did not do that!)
I would say if it will reduce your future energy expenses and you can afford
it, then do all you can now.
So the question is how much would a ground source cost to operate monthly?
How much would a heat pump cost to operate monthly?
Then a new high efficiency gas furnace (propane?) like this...
Also new "Energy Star" windows/appliances, adding more insulation, a solar
water heater can greatly reduce expenses, etc...
"RO" wrote in message
Whole house performance before any new heating system. Normally
efficiency is less expensice and has a longer life then a new heating
systems. After efficieny improvements you can then install a much
smaller heating system thus saving $$$. Now your can be comfortable
and have low bills. If your do the efficiency correct on the envelope
and heating system Geo Thermal will not be recomended as the cost is
so high and it is difficult to get an installer to understand the mass
flow rates of all the loops. If they do not get them correct your
will a very expensive lemon.
Whole House Performance is the wright thing to do...