Sorry, I don’t know much about infrared lamps so I can’t really help on that.

However I can give you some ideas on how to improve your thermal comfort for a very low budget. I don’t have any information about your situation, your home, the temperature you are reaching so it will be very vague but hopefully it can help.

Thermal Effusivity of the walls/floor

The thermal effusivity is a metric of how “cold” a material will feel. For example stone, ceramic or glass have a very high effusivity. It means that if you touch a ceramic tile at 10°C it will feel very cold, on the other hand wood, fabric, lime or earth plaster have a low effusivity, so if you touch a piece of wood at 10°C it will not feel as cold as the ceramic.

It will also impact how much the material radiates or absorbs heat, so a room covered in wood or tapestries will feel warmer than a room covered in tiles.

You can use that to your advantage by

• covering the floor with carpets
• covering the windows with thick curtains
• covering the walls with wood, wallpaper, lime/straw plaster or go very old school with tapestries.

Insulation

I’m stating the obvious but insulating your body is the most effective form of insulation. On material nothing beats wool, it will keep you warm in any condition.

Indoor you A thick wool sweater, wool gloves, wool socks, wool scarf and most importantly a wool hat ! Even if the head rarely feel cold most of the body heat is lost through the head.

All of these can be found cheaply in thrift stores, if you have a bit of money I highly recommend investing in merino wool underlayers too ! It can make a huge difference, it’s an investment but it will save money on the heating.

Then the house insulation is important, it is way more expensive but first making the house “air stream proof” will help.