Karel,

Your unit size sounds fine to me. I live in a 2000 square foot house
in Myrtle Beach, SC and I have a 2-ton heat pump with 4KW strip heat.

Please note that it is usually a bad idea to run strip heat unless it
is below about 35 degrees outside.

If you switch the thermostat to "Emergency Heat", you shut off the heat
pump compressor (the cheap heat) and run strip heat ONLY. Strip heat
is typically only 1/3 as efficient as the heat pump at your conditions.
That means it costs three times as much to operate as the heat pump
for the same amount of heat. Emergency Heat also means you will get
LESS heat, NOT more heat. Use Emergency Heat only if there is
something wrong with you outdoor unit, like a broken fan blade or heavy
ice buildup.

If you post your email address with spaces around the "dot" and "at", I
will email you our 4-page instruction sheet on "Care and Operation of
Your Heat Pump". That should explain a lot of things you need to know.

Don't set a heat pump temperature back at night in the heating season,
it will increase your electric bill.

Hope this helps

Kevin O'Neill
"Stretch"
O'Neill-Bagwell Cooling & Heating
843-385-2220
sixfoot7 @ sccoast dot net