Post edited 6:09 am – June 18, 2010 by smilinjohn
Dale, welcome to our forum.
DW and I do not have a furnace in our 14RK, however, I have 16K btu propane furnace in my 2008 10 foot, V-nose / 4-hole Ice Castle Fish House (wheel house), mfg. in Montevideo, MN. My fish house has approx the same R-factor insulation as the Classic 14RK. The 16K furnace keeps fish house cozy at 70 deg. F, even with frozen lake air temps. of -10 to -25 deg. F. Donna and I plan to use small electric heater when that time of the year comes, such as Spring and Fall months.
The 14RK 5K btu Frigidaire wall-unit AC serves well enough, as long as we keep on High Cool speed and max temp. setting of "7″.
4.6 cu.ft. Refrigerator keeps food / pop cold, while freezer is a bit iffy.
John