Similar ones are available in different temperatures (color) and output.

More cost effective, if someone time consuming, would be to change the most vulnerable pipe to high pressure PEX; I've seen demonstrations of PEX expanded absurdly beyond its size, with pressure and temperature, before busting.

Your lease probably does not address a minimum temperature she should keep the house, but going forward you should.

Insulating pipes is rarely going to prevent frozen pipes when temperatures get very low; a source if heat is the only real solution when temperatures get low like when the “polar vortex” occurs.

I can save money on electricity when no one is there and monitor temperatures to make sure I don't see one of my HVAC units struggling so that I can arrange for service before there is a failure.

Highest temperature in the next 10 days is 85°.Any advice appreciated!!

.- the high humidity is likely caused by a combination of factors: moisture transmission through concrete walls and slab floor, lack of air circulation due to no forced air heating, lack of dehumidifier, cyclical air temperature changes in the home.- the condensation on the walls or windows is primarily due to inadequate insulation and dew point problems caused by cyclical air temperature changes in the home.These problems can be solved with the installation of a proper dehumidifier, improvements to insulation and properly utilized vapor barriers, increased air circulation through the use of ceiling fans, proper furniture placement (not right up against exterior walls), etc.

@Sara BolligerDuring the month of May the maximum temperature in KC was 83. 

If he really is a mentor, he would be the first person you call.There is no need to engage with the tenant about opening his windows or the temperature outside.

When the temperature and humidity  rise, it becomes crucial to keep our pets comfortable and safe.