5.4 Self-Contained Air Conditioners and Through-Wall Heat Pumps This part of the Energy Efficiency Manual explains how to improve the efficiency of self-contained air conditioning units and heat pumps. This part covers window air conditioners, packaged terminal air conditioners (“through the wall” units or “PTAC’s), and air-to-air heat pumps. Virtually all these cooling units operate on the principle of refrigerant compression. (Absorption cooling is rare and specialized in this size range.) The units include all their components in a single package. Outside air is used for condenser cooling. In the case of heat pumps, outside air is the heat source. The units typically are installed in an opening in the building envelope. They often include heating coils, which are usually electric resistance elements. The energy conservation measures explained here include the maintenance needed to maintain efficiency, avoiding air leakage or infiltration around the units, more efficient ventilation, replacement with high-efficiency fan motors, and selection of the most efficient units.

Efficiency ratings are explained, including EER, SEER, and HSPF. HVAC experts out there... I live in Wisconsin and it gets mighty cold here! I have a condo with 2 wall units that are used for both air conditioning and heat. My heat bill in the cold winter months can get up to near $300 per month (normally my bill is about $100 +/- $10 during the spring/fall and is about $200ish in the summer with the air on). window ac unit cheapIf I keep one of the units on in the living room and turn the one in the bedroom off, my electricity bill is higher. hvac home unitIt seems strange but true. ac unit spring maintenanceIf I have both running, they turn on and turn off every 10-15 minutes. They work with my thermostat and whatever it's set to in each room. Whether I have a unit turned off or not, and go next to it, I feel an extreme cold air coming in through it's vent.

I think when it turns off (when it heats the room up to the desired temp), that area cools down and it was like not heating it at all. Seems to be a bad vicious cycle. I guess I'm looking for advice to prevent that heat loss, or to prevent the cold air from coming in from outside. It's about 2 degrees outside. If you want pictures (or make/model numbers) let me know. heating hvac air-conditioning heater cooling You can install an insulating cover on the inside of the unit. Some vendors caution against using outside covers unless the unit has been cleaned and drained first.Browse other questions tagged heating hvac air-conditioning heater cooling or ask your own question. Aerocon - AeroCon split heat pump systems incorporate high efficiency, scroll compressors and extended surface coils to increase the unit's operating efficiency and reliability. Systems are available from 1 to 2-1/2 tons of capacity and 2 cabinet sizes for customer flexibility.FeaturesAdvanced Scroll CompressorLow RPM blowers for quiet operation operationECM blower motor for high efficiency and E.S.P.Powder coated over galvaneal cabinet for durabilitySafety screen painted to match unitStainless steel condensate/defrost panElectric box located in top of unit for easier serviceAdvanced coil designEasy, full front access for serviceFactory piped service valves and pressure ports2 year parts, 5 year compressor warranty

Warranty Offered5 Year Compressor - 2 Year Parts See all 17 items in product family Wall Air Conditioners Are Designed to Minimize Air Leakage And Provide Energy Efficient Cooling Operation. 330, 350, 450, 550 and 800.8,000 - 14,000.3850- 11,200.8.5 and 9.8 The Global Industrial and Friedrich Wall Sleeves come with the Grille Included. Hazardous Location Air Conditioners Are Engineered to Perform in the Harshest Conditions. Hazardgard meets T4 temperature classifications and is designed to cool laboratories, control rooms, living quarters, storage areas and other enclosures situated in hazardous locations; where specific volatile flammable liquids or gases are handled or used within enclosed containers or systems. Hazardgard comes with a sleeve that can be installed in a window or thru-the-wall, provided the wall depth meets specifications. Cooling square footages are 700, 1,000, and 1,400. BTU cool range from 14,500 - 24,000. Voltages are 230/208 or 240/220.. Energy efficiency ratings vary between 8.8 and 9.7.Features:Hermetically sealed reciprocating compressor is cooled during the refrigeration cycle, which allows the unit to tolerate higher outdoor temperatures up to 130°FEnvironmentally sealed on/off switch and gold plated contacts in thermostat for corrosion resistanceSolid-state control relays for compressor and fan operationLarger, commercial grade, enclosed fan motor with hermetically sealed overload for arc-free operation.