by High Performance HVAC | Thermostats |
The Mercury Switch Thermostat | HVAC Control - Mercury switch thermostats are not available for purchase in many states. They have been banned because they contain mercury, and it is important to properly dispose of these thermostats that contain mercury if they are changed out for newer digital thermostats. Some many homes and businesses still have these thermostats in use so we will offer a brief of how these thermostats work including the components inside the thermostat. (more…)
by High Performance HVAC | Thermostats |
Heat Pump Thermostats - To the average person a heat pump thermostat can be a very complicated thermostat compared to the typical thermostat which serves an air conditioning system with gas, electric, or an oil furnace. Of course, the heat pump thermostat typically has more wire terminations than the regular thermostat.
It has more switches to control emergency heat, and some even have lights, which will indicate that the auxiliary heat or emergency heat is functioning. Most heat pump thermostats are two-stage thermostats for the heating mode and a single stage for the cooling mode.
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by High Performance HVAC | Heat Pumps |
Heat Pump Electric Backup Heating Basics. There are different types of electric heating available in homes. Probably the most common use for electric heat other than portable electric heating units is electric heat strips. Electric heat strips used for backup heat in heat pumps. Sizing the electric heat strips for heat pump backup heating applications will depend on many different variables.
These variables include the size of the space to be heated and the insulation values of the whole structure. It also includes doors and windows. Additionally, it includes the geographical location of the dwelling, along with many other factors. Backup heat for heat pumps is essential for the defrost cycle. (more…)
by High Performance HVAC | Air Conditioning |
Dual Two-Stage Split System with a Dual Slab Coil. Huh?
Richard - Very nice site!- Dual Two-Stage Split System with a Dual Slab Coil - I have a question; my home was fitted out by the previous owner with a twinned system, and a thermostat (Totaline P374-1900) which was not designed to control discreet, paired units. I confirmed this with Totaline. The result is only one unit runs, and the second unit is never activated. It functions, but not automatically.
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by High Performance HVAC | Air Conditioning |
What Type of HVAC System Needed for Sun Porch - We added a 300 sq. ft. of living space to our home as a sun porch. How do we effectively, efficiently heat/cool this space? We’ve been pitched several options. 1) Use existing with a manual duct damper to the new sun porch. 2) same as above but use a zoned approach. Zoned w/auto dampers for main house 1st floor and sun porch plus separate thermostats. 3) HVAC with new units for sun porch (e.g., radiate, forced air, etc) (more…)
by High Performance HVAC | Thermostats |
Blank Display on Thermostat Problem - Screen Disappeared - The thermostat display is our interface with our HVAC equipment. The display lets us know what the temperature is in the house. The display tells us what the desired settings are including letting us know the setpoint setting the temperature.
Some displays give us time, and the newer modern displays show us family photos like a screensaver on our computer. But what happens when the display is not there, or there is a blank thermostat display or no display on the thermostat?
Is it a bad thermostat or something else that caused the display to disappear? What do you do when the thermostat screen is not working? (more…)
