## T-shirt Size Breakdown Calculator

Total T-shirts: 0

Size | Chest Circumference (inches) | Length (inches) | Sleeve Length (inches) |
---|---|---|---|

XS | 32-34 | 27 | 8 |

S | 36-38 | 28 | 8.5 |

M | 40-42 | 29 | 9 |

L | 44-46 | 30 | 9.5 |

XL | 48-50 | 31 | 10 |

XXL | 52-54 | 32 | 10.5 |

XXXL | 56-58 | 33 | 11 |

## FAQs

**How do you size an evaporative cooler for a greenhouse?** To size an evaporative cooler for a greenhouse, you’ll need to consider factors like the greenhouse’s square footage, the desired temperature drop, outside humidity, and air circulation. A rough estimate is about 2,000 to 3,000 CFM (cubic feet per minute) per 1,000 square feet of greenhouse area.

**How do you calculate cooling load for a greenhouse?** To estimate cooling load for a greenhouse, you can use this simplified formula: Cooling Load (BTU/hr) = Greenhouse Area (sq. ft.) x Temperature Difference (ΔT) (°F) x 0.133 Where ΔT is the desired temperature reduction.

**Will an evaporative cooler work in a greenhouse?** Yes, evaporative coolers can work well in greenhouses, especially in dry or arid climates. They provide efficient and cost-effective cooling by adding moisture to the air, which lowers the temperature.

**How do you calculate evaporative cooling capacity?** Evaporative cooling capacity is typically measured in CFM (cubic feet per minute). The capacity depends on the size and efficiency of the cooler. A rough estimate is 2,000 to 3,000 CFM per 1,000 square feet of greenhouse area.

**How many gallons a day does an evaporative cooler use?** An evaporative cooler can use approximately 2 to 15 gallons of water per hour, depending on its size and operating conditions. Over a day, this can range from 48 to 360 gallons.

**Is a bigger evaporative cooler better?** A larger evaporative cooler can provide more cooling capacity, but it should be appropriately sized for the greenhouse. Oversizing can lead to excessive humidity and energy waste.

**How do you calculate cooling requirements?** As mentioned earlier, use the formula: Cooling Load (BTU/hr) = Greenhouse Area (sq. ft.) x ΔT (°F) x 0.133 to estimate cooling requirements.

**How do you calculate CFM for a greenhouse?** A rough estimate is 2,000 to 3,000 CFM per 1,000 square feet of greenhouse area. Adjust this based on specific greenhouse conditions.

**What is the disadvantage of evaporative air cooler?** The main disadvantage of evaporative coolers is that they are less effective in high humidity environments. They can increase indoor humidity levels, which may not be suitable for some applications.

**When should you not use evaporative cooling?** Evaporative cooling is less effective in areas with high humidity, as it may not provide sufficient cooling and can increase indoor humidity levels.

**What is the best cooling system for a greenhouse?** The best cooling system for a greenhouse depends on factors like climate, greenhouse size, and budget. Besides evaporative coolers, options include fans, shade cloth, and even traditional air conditioning in some cases.

**What is 30% humidity for an evaporative cooler?** 30% humidity is relatively low and ideal for evaporative cooling. Evaporative coolers work best in dry conditions.

**What is the maximum cooling for an evaporative cooler?** The maximum cooling capacity of an evaporative cooler depends on its size and efficiency. As a rough estimate, it can lower the temperature by 10-20°F in dry climates.

**What is too much humidity for an evaporative cooler?** Humidity levels above 60-70% can significantly reduce the effectiveness of an evaporative cooler.

**Can I run my evaporative cooler all day?** Yes, you can run an evaporative cooler all day, as they are energy-efficient. However, monitor humidity levels to avoid excessive indoor humidity.

**Can you run an evaporative cooler 24/7?** Yes, you can run an evaporative cooler 24/7 if needed. They are designed for continuous operation.

**How many gallons per hour does an evaporative cooler use?** An evaporative cooler can use approximately 2 to 15 gallons of water per hour, depending on its size and operating conditions.

**What size swamp cooler do I need for 2,000 square feet?** For a 2,000 square foot area, you would generally need an evaporative cooler with a capacity of around 4,000 to 6,000 CFM.

**Will an evaporative cooler work in 70% humidity?** Evaporative coolers are less effective in high humidity environments, and 70% humidity may limit their cooling capacity.

**How do I make my evaporative cooler colder?** To make your evaporative cooler colder, you can:

- Ensure proper maintenance and clean water pads.
- Increase airflow by adjusting fan speed.
- Reduce indoor humidity levels by ensuring good ventilation.

**What is the thumb rule in HVAC?** One common thumb rule in HVAC is that for every 500 square feet of space, you typically need 1 ton (12,000 BTU) of cooling capacity.

**How many BTU do I need for a 12×12 room?** For a 12×12 room (144 square feet), you would typically need around 5,000 to 6,000 BTU for cooling.

**How do you calculate BTU for cooling?** Calculate BTU for cooling using this formula: BTU = Area (sq. ft.) x ΔT (temperature difference, °F) x 25 (common factor).

**What is the fan airflow rate of a greenhouse?** The fan airflow rate for a greenhouse varies but can range from 2,000 to 3,000 CFM per 1,000 square feet of greenhouse area.

**How much air circulation does a greenhouse need?** A greenhouse generally requires good air circulation to distribute heat and control humidity. Aim for 5 to 10 air changes per hour.

**How many CFM per square foot for cooling?** A rough estimate is 2 to 3 CFM per square foot for cooling in most residential and commercial settings.

**What is the rule of thumb for cooling loads?** A common rule of thumb for cooling loads is 20-25 BTU per square foot for residential spaces and higher values for commercial and industrial spaces.

**How do you calculate CFM for cooling loads?** Calculate CFM for cooling loads by dividing the cooling load (in BTU/hr) by the temperature difference (ΔT in °F) and then multiplying by 1.08 (a constant).

**What are the disadvantages of evaporative cooling?** Disadvantages of evaporative cooling include reduced effectiveness in high humidity, increased indoor humidity, and the need for a constant water source.

**Should the windows be closed when using an evaporative cooler?** It’s generally recommended to keep windows partially open when using an evaporative cooler to allow for proper ventilation and fresh air exchange.

**How often does an evaporative cooler dump water?** The frequency of water dumping in an evaporative cooler depends on the specific model and settings but typically occurs every few hours.

**Can you run an evaporative cooler 24/7?** Yes, you can run an evaporative cooler 24/7 if needed. They are designed for continuous operation.

**How many air changes per hour for evaporative cooling?** For effective evaporative cooling, aim for 20-30 air changes per hour in the space you want to cool.

**Is it cheaper to run a swamp cooler or AC?** Swamp coolers (evaporative coolers) are generally cheaper to operate than traditional air conditioning systems because they use less electricity.

**What size swamp cooler do I need for 1,000 square feet?** For 1,000 square feet, you would typically need an evaporative cooler with a capacity of around 2,000 to 3,000 CFM.

**What is considered high humidity for evaporative cooling?** Humidity levels above 60-70% are considered high for effective evaporative cooling.

**Why doesn’t evaporative cooling work in high humidity?** Evaporative cooling relies on the evaporation of water to cool the air. In high humidity, the air is already saturated with moisture, limiting the cooling effect.

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