Welcome to shop.rdholder.com

RD Holder HVAC Instrument Store

NOW Includes Tactical Equipment


AR10 and AR15 Parts


USE (rdholder) as a promotional code

to get a 5% discount

 FREE Shipping to the USA, Territories, Possessions and APO/FPO


Also have a look At MY Smart Phone App,



 For A/C Troubleshooting

At the Apple or Google APP store

For $12.99 you get 40 years of my experience in the HVAC industry


We invite you to browse through our store, shop with confidence and create an account with us if you like, or shop as a guest. Either way, your shopping cart will be active until you leave the store. For all sales shipping is FREE in the USA and APO/FPO. Shipping will be through USPS Priority Mail or USPS Parcel Post. You may pay with your with your credit card (Discover, Visa or Master Card) or with PayPal. While browsing my web store, make sure you go to Books and Papers On HVAC to download FREE articles.


NOTE: For USA, its territories, possessions and APO/FPO customers. When using a Promotional Code with PayPal do not use the PayPal that is in the Shopping Cart. Use the PayPal on the payment page.  That is where the Promotion Code goes for PayPal and Credit Cards.  Always apply the code before completing transaction. If you choose PayPal the systom will take you to the PayPal to pay.


You can call me at (C) 661-477-4902 or E-Mail  me at rdholder@cox.net for any further questions or assistance.

Thank you for visiting our store

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    MY Smart Phone App, HVACPro, now available for A/C Troubleshooting


    At the Apple or Google APP store