Help with electric help?

I need to find out total amps ill be using when everything in on. so far I have 5.5 amps+ 400 watt light+ 1500watt oil filled heater. Im running on a 20 amp circuit. Need to know if Ill be okay. I was fine last year with no heater. But this 1500 watt heater has me questioning this.

Watts/volts=amps.

Assuming 120v, 400w=3.33 amps 1500w =12.5 amps.

You're pushing it. I'd advise you try and split your load.

Yeah I just figured it out...Im past pushing it im over. deumhumidifer, exhaust, circulating fan =5.5 amps so Im at 21+ amps. It just isntt gonna work. Not to mention, if I used that space heater I imagine the elec. bill would be so high it would barely even be worth growing. I may just have to let the plant sit in 58 degree temps at night. I don't think theres anything I can do about it.

I seriously doubt my sativa dom blue dream is gonna like those cold temps......ughhhh just my luck...

Dump the heater, your plants will be fine.

just a take a bit longer right? Will low heat effect quality or will it just delay the maturity time?