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Water Heaters

Gas Vs Electric Water Heater Monthly Cost Comparison (State-By-State)

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Every time we talk about water heating costs, we come across the question “Electric vs gas water heater cost; which is cheaper?”. It’s pretty much unavoidable. To put the debate if it is cheaper to heat water with gas or electricity to rest, we have made a full comparison of yearly and monthly gas vs … Read more

Categories Tankless Water Heaters, Water Heaters 2 Comments

Water Heating Costs For 1,2,3,4,5,6 Family Homes (State-By-State Analysis)

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In the US, we spend $400 to $600 per year on water heating. Right? Well, this water heating cost has been thrown around quite a lot. But does that number apply to both 1-member and 2-member households, as well as 5-member and 6-member households? Is this the water heating cost for a 1,000 sq ft … Read more

Categories Tankless Water Heaters, Water Heaters Leave a comment

Electric Water Heating Cost, kWh Usage Per Month (State-By-State RECS Analysis)

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Electric water heaters run on electricity. In some states, you can check how many kWh does a water heater use per month from the utility bill. However, most of us don’t really get that data, or if we do, we don’t really know if the number of kWh water heater uses per month or electric … Read more

Categories Tankless Water Heaters, Water Heaters Leave a comment

Water Heater Wire Size Chart: Which AWG Gauge Wire?

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Big enough wire won’t fry the water heater circuit. What size wire do you need for a hot water heater? The choices range from 8 AWG, 10 AWG, 12 AWG, 14 AWG, 16 AWG, and even 18 AWG wire. We will explain this in simple terms the same as we did with the water heater … Read more

Categories Water Heaters 5 Comments

What Size Breaker For Water Heater? 10-100 Gallon Breaker Size Chart

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When wiring a water heater, you have to nail the breaker size. If you don’t adequately determine what size breaker you need for your water heater, the whole circuit can go up in flames. That’s why we will explain exactly how to size a water heater breaker. You can also consult the water heater breaker … Read more

Categories Water Heaters 2 Comments

Water Heater Amps: How Many Amps Does A Water Heater Use?

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How many amps does a water heater use? You will need to know the current draw if you want to adequately size a breaker, a wire, or if you want to run a water heater with a generator. Water heater amp usage is quite easy to figure out. Check the label on the water heater … Read more

Categories Water Heaters Leave a comment

Water Heater Wattage: How Many Watts Water Heater Uses?

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In a lot of cases, it is useful to know exactly how many watts water heaters use. If you want to run a water heater using a generator or estimate electricity costs, you will need to know the water heater wattage. How to check how many watts does your electric water heater draw? Just check … Read more

Categories Water Heaters Leave a comment

Water Heater Size Calculator: What Size Water Heater Do I Need?

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Adequately sizing a water heater is not all that easy. When choosing a water heater capacity for a family of 2, 3, 4, 5, or 6, there are two rather common mistakes most people make: Getting a too small water heater (undersizing). If your water heater capacity is too low, you are likely to run … Read more

Categories Water Heaters Leave a comment

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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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