Hacker News new | ask | show | jobs
by abfan1127 915 days ago
I won't speak to cooking. But, gas central air heaters are much cheaper to operate than heat pumps in Phoenix, AZ. I wish it wasn't so environmentally speaking. But from a cost point of view, its better to use natural gas than electricity.
3 comments

I can see heat pumps costing more than natural gas furnaces in cold regions, but I would not have expected it in Phoenix. Are electricity prices super high or gas prices super low?
> gas prices super low

EXTREMELY low. I was shocked in the PNW when we switched to a house with natural gas appliances how much we saved.

In some cases they are not even superior appliances but you save so much money.

That's just a policy choice. There's no law of physics that makes an electric heat pump cost more.
Actually it is physics and the market https://www.statista.com/statistics/220174/total-us-electric... a huge percentage of us electrical power is from natural gas. Natural gas to electricity to heat is a lot less efficient.
There's not even a physics reason why a heat pump needs to be electric. There are gas-fired heat pumps. There are even gas-fired refrigerators. These weird anti heat-pump memes are just being regurgitated by people who do not understand what they are talking about.
A modern gas turbine is around 50% efficient, give or take 10%. A modern heat pump has a COP of around 4, so burning gas to make electricity to run a heat pump is more efficient than burning gas to make heat.
An electric heat pump by nature has a lot more parts.

A gas furnace is just a few sensors, a burner, a fan, and a box to do it in.

> a fan

I think you might be underestimating the # of components in a modern furnace.

I'm intentionally being reductive, but I have worked on several furnaces and gas furnaces are an order of magnitude simpler than their respective heat pump.

... gas furnace + A/C compressor is another story.

How is that policy choice?

Are be subsidizing the natural gas suppliers or adding fees to natty generation plants?

Retail prices of both electricity and mineral gas are highly regulated. They aren't market outcomes in any sense.
I live in Texas. At least for electricity it’s a fairly free market of prices. I would be surprised to learn natty gas is being heavily subsidized here too.
How?