Increased insulation and air sealing is the first thing to address. An attic easily hits 130 degrees on 90 degree days. If you only have a few inches of insulation, or even 8-12, your air conditioner has to work awfully hard to keep up a 70 degree temperature.
A few more issues are in play here as well.
1. Lots of heat - in the afternoon the sun has been beating on your house for hours, warming up all of the building materials - the studs, siding, drywall, etc. Your house is much hotter as a whole than at 6 AM when the sun comes up.
2. Temperature Stratification - heat rises (in general) so the upstairs is hotter than the downstairs. With too little insulation there could be a 10-15 degree difference. It should be more like 2-3 degrees.
3. Reverse Stack Effect - In the winter heat rises through your house. In the summer the denser, colder air falls through the house, into the basement, and out the top of the walls of the basement (the band joists). Air comes in to replace it from the attic. This is an example of heat goes to cold or the Second Law of Thermodynamics.
4. Poor Air Sealing - Light fixtures, attic hatches, chimneys, Plumbing stacks, and much more are leaking hot air into the house which your AC then has to cool.
Basically, get more insulation in your attic and be sure it is air sealed (caulk and foam those holes in the ceiling mentioned). Look for a "Home Performance" contractor, not just an insulation contractor.
There could be reduced efficiency due to dirty coils, filter, or ducts. If the filter is clean and the coils, both inside and outside are clean and the duct work is not stopped up or leaking, check to see if the condenser is blocked by plant growth. Check to see if the freon charge is to low.
72° is a bit cool. The recommended temperature is 78°. If your system was sized to efficiently maintain 78° it will be to small to maintain 72° in the heat of the day.
Many homes have load balancing from their electric company, which allows the utility to remotely shut off your outdoor unit during periods of high demand. This is usually in the afternoon when the heat load is the highest on your home, which in turns makes your home get hotter.
According to the International Energy Conservation Code (IECC) section of the International Building Code, the size (capacity) of a residential HVAC system cannot be designed to maintain an indoor air temperature of less than 75°. The processes that must be followed to determine the final system design are ACCA's Manual J (heat load calculation), Manual S (equipment sizing calculation) and Manual D (duct design procedures).
HVAC Equipment Evaluation - A trained service technician should perform a complete evaluation of the system to confirm that it is operating to the manufacturer's specifications. It is not possible to determine if the system is producing the correct amount of cooling by reading the operating pressures, by measuring the temperature difference between the air entering the indoor unit and the air leaving the indoor unit or by doing both. In order to determine the system's total total output capacity, "wet bulb" temperature and and total air flow measurements must also be taken and then the total capacity can be determined using a psychometric chart. If it is not known if the system is operating at its full design capacity, then replacing the system with a larger unit could replace the existing issues with a long list of new issues, not to mention higher utility bills for the life of that system.
The reason your A/C fails to keep the temperature you set late in the day is simply because it is sized wrong. A properly sized and properly installed heating or A/C system will maintain the desired temperature 24 hours a day, 365 days a year.
It is always afternoon, but depending on the time of year, it can sometimes be evening. Evening is generally when the light is beginning to fade.
Evening immediately follows afternoon; there is no time between them.
in the morning afternoon and evening.
afternoon evening begins at 6:00 Because on a clock twelve is up and six is down so that makes afternoon from noon-6:00 evening 6:00-midnight
Early Morning : 6:00 AM Mid Morning : 8:30 AM Late Morning : 11:00 AM Early Afternoon : 12:30 PM Mid afternoon : 3:00 PM Late Afternoon : 5:00 PM Early Evening : 6:30 PM Mid Evening : 9:00 PM Late Evening : 11:00 PM
The dogs habitually sleep in the morning, play in the afternoon, and eat in the evening.
PM is afternoon & evening, ANTE meridian and POST meridian.
Usually just verbal laziness, or they are having a bad day themselves and don't feel it IS good. Just ignore it and continue to be polite and pleasant yourself .
Afternoon or evening
In the morning, afternoon & evening.
Shaam Small correction: Afternoon = Dopehr Evening = Shaam
feasgar math means 'good afternoon/evening'.
8am is morning. AM is morning whilst PM is afternoon/evening.
Fargo, OK: Monday morning is 13C, afternoon is 23C, evening is 19C Fargo, ND: Monday morning is 1C, afternoon is 6C, evening is 5C Fargo, GA: Monday morning is 15C, afternoon is 29C, evening is 22C
Late afternoon. You want to wear something dressy, but not evening wear. It is too early in the day for evening, but late in the afternoon for morning.
Afternoon means after 12:00 mid-day until 6pm, then evening begins
Inelastic demand is the reason why movie theaters charge less in the afternoon than in the evening.
good morning: buenas dias good afternoon: buenas tardes good evening: buenas noches
La tarde (also 'afternoon') for early eveing La noche for late evening
"In/during the afternoon" in the afternoon/in the evening In the afternoon. Example: Me gusta esquiar por la tarde. Translated: I like to ski in the afternoon.