Symptoms of severe hypocalcemia include numbness or tingling around the mouth or in the feet and hands, as well as in muscle spasms in the face, feet, and hands. Hypocalcemia can also result in depression, memory loss, or hallucinations. Severe hypocalcemia occurs when serum free calcium is under 3 mg/dL.
HeatBloc is an aluminum colored, water-based, low emissivity (low-e) coating. When applied to building materials such as plywood, OSB or plasterboard, HeatBloc lowers their surface emissivity to 0.25 or lower, thereby blocking over 75% of the radiant heat trying to enter the home. It is classified by ASTM as an Interior Radiation Control Coating (IRCC).
For block heaters over 1800-watts or heaters that operate on 240-volts, timers will cost $40 to $60. In both cases the payback is less than one season.Timers are available at most hardware stores and building centers.Timers should be outdoor or weatherproof rated and installed on properly grounded electrical circuits.f block heaters are not standard with a particular engine, after-market block heaters are available. A block heater usually takes only 1 to 2 hours to warm an engine for starting.