Engineered only. Only from a few manufacturers. They have to specifically state it in writing. Not verbally. You must document the system specifics and operating particulars. You must have whole home humidification.

You can only choose low temp water systems. No electric. Not at all a cheap choice. Ever. If you need AC, you’ll pay double plus for 2 systems.

Is this electric heat for a SMALL room? Is this whole-home heating system with hydronic (liquid filled) tubing? Are you on concrete slab (with the tubes inside the concrete)? Or is this plywood subfloor with the tubes underneath?

New build or a renovation?

A little bit more about your situation will help.

Ok, it’s a very large room with hydronic liquid filled tubing on a concrete slab. We live in a desert climate with soaring temps in the summer.

OK...so how do you control the heat inside the house? A/C? How do you ADD humidity into the home? In a desert climate the outside humidity can sit around 5%-15%. The interior humidity will sit a snick higher (because of showers, human breath, etc) at 15% - 25%. That is still WAAAAAAAY too low for wood - engineered or otherwise.

Wood (like your cabinets, your doors, window trim, framing, drywall,etc) all need indoor humidity to sit around 40%.

You need to ADD humidity into the home. What do you have to do that?

Was the BTU add into the home designed with the plan of putting wood on top of it? Or with concrete or tile floors being the unobstructed radiators ? Because wood is actually an insulator, averaging R-1 per inch. It retards heat radiation into the room, and the system has to be designed to overcome that from the beginning. How well was the slab isolated from the earth and insulated during construction?

This isn’t a “decorating” decision. This has to do with the fundamental HVAC design calculations and the actual build out construction of the home.

The big lag time response of the thermal mass with radiant makes it a poor choice where you have wide temperature fluctuations. You need something with more agility in response, or you’ll be opening windows at 9:00 am to cool the house off, and you’ll be freezing at 7:00 pm because it hasn’t ramped up yet. You need a steady state of exterior temperature to have it be at all efficient and comfortable.