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Uncategorised

How Does Humidity Affect Temperature? (+ Temp-Humidity Chart)

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Humidity and temperature are correlated. Our perception of temperature is affected by humidity levels. We are talking about the humidity and temperature relationship. Questions like “At what temperature does humidity feel colder?” or “Do we feel warmer when humidity levels are lower?” steer from this relationship. This is the classic moist heat vs dry heat … Read more

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What Is A Mini Split Air Conditioner? Split System Units Explained

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“What is a mini split?” Many HVAC experts would say a mini split is the best thing that has happened in HVAC in the past 20 years. And it’s not hard to see why. Essentially, mini splits are heat pumps that can provide both cooling in the summer and heating in the winter. In fact, … Read more

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HVAC metrics:

SEER = (1 × EER100% + 42 × EER75% + 45 × EER50% + 12 × EER25%)/100

EER = BTUcooling/W

HSPF = BTUheating/W

COP = Q (useful heat)/W (input work)

ACH = CFM x 60/Area x Heightceiling

Total Heat (BTU/hr.) = 4.5 x CFM x Δh (std. air)

Sensible Heat (BTU/hr) = 1.1 x CFM x Δt (std. air)

Latent Heat (BTU/hr) = 0.69 x CFM x Δgr. (std. air)

1 HP = 746 Watts

1 kW = 3413 BTU

 

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