Size of 1 HP Aircon Calculator

Room Size Formula:

\[ A_{room} = \frac{1 \times 2545 \times COP}{139} \]

Room Size (ft²):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is a 1 HP Aircon Room Size Calculator?

Definition: This calculator estimates the appropriate room size (in square feet) that can be effectively cooled by a 1 HP air conditioning unit based on its COP.

Purpose: Helps homeowners and HVAC professionals determine if a 1 HP aircon unit is suitable for a given space.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ A_{room} = \frac{1 \times 2545 \times COP}{139} \]

Where:

\( A_{room} \) — Room area in square feet
\( COP \) — Coefficient of Performance (typically 3.0-4.0 for modern units)
2545 — Conversion factor (BTU/hr per HP)
139 — BTU/hr required per square foot

Explanation: The formula converts HP to cooling capacity (BTU/hr) then divides by the cooling requirement per square foot.

3. Importance of Proper Sizing

Details: Correct aircon sizing ensures energy efficiency, proper cooling, and prevents short-cycling or excessive wear.

4. Using the Calculator

Tips: Enter the COP value (default 3.5 for most modern units). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is COP in air conditioning?
A: COP (Coefficient of Performance) measures efficiency - the ratio of cooling output to energy input.

Q2: What's a typical COP value?
A: Modern units range from 3.0 to 4.0. Higher COP means more efficient cooling.

Q3: Why 2545 in the formula?
A: This converts 1 HP to BTU/hr (1 HP = 2545 BTU/hr).

Q4: What factors affect room size calculations?
A: Insulation, windows, ceiling height, sunlight exposure, and occupancy may require adjustments.

Q5: How accurate is this calculation?
A: It provides a general estimate. For precise sizing, consult an HVAC professional who can perform a Manual J calculation.