| Business | Phone |
| A 1 Hvac 4868 Uhrmann Rd, Klamath Falls 97601 | (541) 273-7547 |
| Dussel Construction Inc 7724 Booth Rd, Klamath Falls 97603 | (541) 851-0932 |
| Modern Heating Co 7809 Donegal Ave, Klamath Falls 97603 | (541) 882-2666 |
| Toyostove Clean Heating Systms 977 S Spring St, Klamath Falls 97601 | (541) 884-5167 |
| United Mechanical Contractors 2219 Washburn Way, Klamath Falls 97603 | (541) 884-1521 |